Method of erection of pipe line in permafrost soils (versions)

FIELD: construction engineering; erection of pipe lines in permafrost soils at alternating terrain.

SUBSTANCE: trench in smooth terrain and in sections cut by hydrographic net is dug in active layer at depth sufficient for location of upper generatrix of pipe line above level of daily level. Prior to laying the pipe line, bottom walls and berms of trench are lined with cloth of non-woven synthetic material. backfill soil is placed in ballasting polymer panel-type devices or in ballasting polymer container-type units suspended from pipe line. Anti-erosion partitions made from non-woven synthetic material are formed in sloping sections together with funnel whose neck is located downward of water flow embracing the pipe line at specified clearance between neck and pipe line. Funnel is formed by covering the natural slope of backfill soil by free lower edge of non-woven synthetic material with ballasting polymer panel-type or ballasting polymer container-type devices placed on lower portion of funnel followed by subsequent removal of embankment protecting the pipe line. As far as sections of route cut by hydrographic network are concerned, anti-erosion partitions are formed in trench at transients with opposite slopes of microterrain; anti-erosion partitions are made from anti-erosion cloths and backfill soil is placed n soil-filled weighting materials attached to pipe line. At low points where opposite sections cross, water pass or water bypass structure is formed in trench.

EFFECT: enhanced reliability; reduced scope of earth-moving work; enhanced stability of pipe line in horizontal plane.

9 cl, 8 dwg

 

The invention relates to the field of construction and can be used in the construction of pipelines in permafrost soils during transportation of products with negative temperature.

It is known that during operation of underground pipelines change the initial position, that is in communication with the pumping conditions of the product due to the specific pipe-laying and depends on the terrain, it changes due to hydrogeological processes or industrial developments. Move the pipe in the ground lead to the deterioration of the insulation, the occurrence of excessive stresses in the pipe wall, and sometimes to damage, bringing great damage.

In this regard, the problem of stabilization of pipelines is very relevant, especially in Northern areas during the construction of the pipeline in frozen soils. It is known that the development of permafrost is equivalent to the development of rocky soil.

The known method half-deepened pipeline crossing the pipeline route areas with permafrost soils. The pipeline is placed in a reduced trench depth, and to secure the pipeline and its protection is used ballasting devices that consist of a hollow cylinder of a complex type, the implementation of the tion of the water-permeable non-woven synthetic material (NCM), in which concluded the pipeline, fixed clamps from surfacing. The cylinder is filled with slurry of mineral soil, which is served by a flexible pipeline, fixed in a certain way in the upper part of the cylinder of the MNC, or direct hydraulic in waterproof sleeve made of MNC, mounted on top of the pipe and the sleeve is a track separation of slurry along the length Ballesteros section of the pipeline. Filling the cylinder from the MNC soil forms a mound in the underground pipeline. When included in paintings from the MNC grass seed can achieve a sustainable vegetation cover that protects the embankment slopes from atmospheric influences (see STRIZKOV S.N. "The use of means of dredging in ballast piping soil", EI "the construction of the oil and gas industry", Moscow, Nipimorneftegas, 1980, pp. 19-21).

The disadvantage of this method is the need to divert water from the pulp when the hydraulic soil in ballasting the cylinder from the MNC with the thawing of frozen ground, dislodging the trench and all the disadvantages associated with this process indicated in the analysis of the previous known solutions (see SU 1549205). In addition, to prevent halos thawing on "warm" and "hot" participants of the Oh pipeline satisfied with the Foundation of an effective insulation material, encased in a waterproof shell.

There is a method of laying a pipeline in permafrost soils, which are as follows. The objective of the invention is the reduction in capital costs when fixing the pipeline by marajuana it in the frozen ground.

In low-temperature permafrost dispersed soils tear trench in which to lay the pipeline and produce a layer-by-layer filling the array ground with its subsequent compaction and moisture, the thickness of the layer is 0.5-0.7 m Above the trench 1 create a mound 4 exceeding 1-1,2 m above the boundary 5 of seasonal thawing of permafrost soil. It is assumed that in this way you are saving a compacted frozen reference array on the pipeline during the summer period of operation. If the excess of the embankment is less than 1 m, it can lead to the lowering of the boundary layer of seasonal thawing of the soil above the pipeline and, consequently, to the thawing of frozen reference array.

The frozen moisture of the soil is carried out so that the total moisture content (including the content of ice and unfrozen water) was 15-45%. At lower moisture resistance to compression and compaction for all frozen ground increases. At higher humidity, the strength of frozen soils is not increased. The thickness of the layer is selected, the outcome is of the magnitude of the rebound in this range is 5-6 cm, which is not dangerous for the strength of the pipeline. When the layer thickness of less than 0.5 m soil moisture decreases faster, which makes it difficult to seal. When the layer thickness of more than 0.7 m experiencing technical difficulties seal.

To create a solid support array backfill, compaction and moisture frozen ground carry out sites length 20-400 m length of the plot in the claimed range is selected depending on the composition and properties of soil (volumetric weight of the frozen ground, the humidity, the proportion of solid soil particles, the weight content of unfrozen water, ice content and temperature of external air.

Since the operation to seal and moisturize produce at negative ambient temperatures, and then a layer of compacted soil freezes, increasing its strength is actually immediately after the passage of the units, creating a continuous belt of the frozen ground.

The filling moist and compacted layer is produced with some delay in the time needed to provide adhesion of soils compacted layer, from which the outside air temperature and the type of soil depends on the duration of exposure. Long resistance layer of soil shear reaches its nominal value, which ensures the stability about knogo provisions of the pipeline. The device is compacted embankments over soft layer creates protection from its thawing in the summer time when the transportation of gas with a negative temperature minus 2-7 degrees (see SU 1549205).

The disadvantage of this method is that during the construction period, a period of testing and commissioning of the pipeline there is no aura of freezing the soil around the pipeline, because in the period have been transported cooled gas through the pipeline. The specified aura appears and freezes during the process of pumping the cooled gas through the pipeline during the first years of its operation. Therefore, in the first year or two after construction of the pipeline is the thawing of frozen soil around the pipeline. This leads to the fact that the trench uplyvaet, is the destruction of the backfill, complete loss of longitudinal stability of the pipeline, offset it from the design position, accompanied by a sharp increase in deflection and possible collapse of the pipe.

In addition, it is known that changes in the pumping mode of the product underground pipeline in permafrost, extended when heated and shrink when cooled, causes shear stresses in the contact surface of the pipeline with the ground. This leads to damage to the insulation of the pipeline. As a result of violations of the integrity of the protective coating WA what is intensive corrosion of the exposed areas.

In the known method, it is impossible to seal the frozen soil without wetting at low temperatures, and moisture of the soil backfill increases its ice content.

The operation of pipelines laid in the North of the underground, shows that a significant number of violations of the reliability of the pipelines due to the phenomenon of creep of the soil, especially pipelines laid in the swamps and in soils with high ice content. This is expressed in the fact that over time without increasing efforts there is a gradual increase in the movement of underground pipelines in the ground, swelling of pipelines and damage from bending stresses. The occurrence of primary creep results during the first years of operation to the deflections and stresses in excess of regulatory levels.

Thus, there is the task of creating a method of laying pipeline in permafrost of the North, allowing to minimize excavation in frozen soils, providing cost effective method prigruzki, fixing the pipe, whereby movement of the pipeline remain within acceptable limits.

In the claimed group of inventions solves the problem minimize earthworks to ensure the legal protection of the pipeline, removal of soil erosion, permafrost degradation, ash soil waters in the ol of the pipeline trench and associated this ash soils ourageously.

This task is solved in that in the method of construction of the pipeline in permafrost soils on the terrain with undulating nature of the terrain tear trench, put it in a pipeline, it is fixed and secured to the design elevations of the soil backfill. Trench tear in active layer depth, providing the location of the pipeline in which the upper forming does not exceed the level of the surface. Before laying the pipe line the walls, bottom and berm trench sheets of non-woven synthetic material (NCM) with overlap of their transverse pipe edges and securing the longitudinal edges on the berms of the trench and the soil backfill placed in containers hung on the pipe close to each other ballasting polymer-panel devices (SRD) with subsequent filling protects the piping of the embankment.

On the terrain with undulating nature of the terrain to the rugged hydrographic network terrain with slopes less than 30% trench tear in active layer depth, providing the location of the top of pipe is not above the level of the surface. Before laying the pipe line the bottom wall and berm trench panels from the MNC with the overlap of their transverse pipe edges and pinning continue the data edges on the berms of the trench. Put it in a pipeline, it is fixed by the soil filling with the filling of the sinuses and fix the pipeline, ballestero its soil backfill placed in hung on the pipe close to each other foam or ballasting polymer container devices (PCBU). Make the trench erosion of the walls of the panels of the MNC by formation of the transverse edges of each panel of the MNC funnel, the mouth of which is located down the watercourse, covers the pipe and fixed it by ensuring that the calculated values of the gap between the neck and the pipeline. Mount the funnel in the trench shall be exercised on its top soil backfill with the formation of the angle of repose in the area of the funnel. This funnel is formed by an overlap of repose of the soil backfill free lower edge of the cloth - overlap of the longitudinal edges of the cloth of the MNC, placing the foam or PCBU on the bottom of the funnel and with the subsequent dumping of protecting the piping of the embankment.

In permafrost soils on the terrain with undulating nature of the terrain to the rugged hydrographic network of the route and at the junctions with opposing gradients of microrelief tear trench, put it in a pipeline, fix it with soil filling with the filling of the sinuses and fix the pipeline, ballestero it is runcom backfill, placed in containers hung on the pipe close to each other, PCBU and other protosemantic mass (GU), for example containers textiles (CT). Before laying the pipe line the bottom wall and berm trench erosion towels with overlap of their transverse pipe edges and securing the longitudinal edges on the berms of the trench. Soil backfill placed in containers hung on the pipe close to each other protosemantic mass (SE) from technical fabrics. Make the trench erosion of the walls of erosion towels by the formation of transverse edge of each towel a funnel neck which is located down the watercourse, covers the pipe and fixed it by ensuring that the calculated values of the gap between the collar and the pipe, and fastening funnel in the trench shall be exercised on its top soil backfill with the formation of the angle of repose in the area of the funnel, leaving free the increased width of the lower edge erosion towels. This funnel is formed by an overlap of repose of the soil backfill free bottom edge erosion towels - overlap of the longitudinal edges erosion towels with the placement of goo on the bottom of the funnel, the upper cha is th funnels have above ground water level in the trench, and in low wet areas at the intersection of opposing gradients in the trench arrange culvert or vodopropusknye structure.

As a culvert or Vodopianov structures used, for example, installed in a trench erosion cylindrical containers textiles (CT) in combination with filling the trench erosion cylindrical gruntotsementnyh containers (KP).

The amount of overlap overlap transverse to pipe the edges of the panels of the MNC or erosion towels appoint conditions shelter berms and slopes of the trench in the formation area of the funnel of the adjacent panels of the MNC, which eliminates their exposure and erosion groundwater. Erosion towel is made of panels of the MNC, the transverse edge of which is provided with a longitudinal axial section and to extend the edge of the cloth, forming a funnel, sewn-in insert of a material identical to a material of the cloth. Sewn into the cloth insert has a triangular shape.

Used for ballasting pipeline grantodateljami weights (SE) from technical fabrics have different design and well known in the field of construction of pipeline transport. For example, from technical specifications 48 34-002-17179339-03, as well as from technical specifications 48 34-003-17179339-03. Famous: ballasting on emerna-panel device PUF-5, PUF-6, ballasting polymer container device PCBU), containers, textile CT, KMT, erosion containers KP. On crossing rivers and streams may use the well-known circular concrete goods or cast iron ring weights.

Polymer-container ballasting device PCBU) comprises a pair of rigid frames, which are symmetrical and adjacent the lower longitudinal carriers parties to the pipeline imposed on him and connected with the bottom longitudinal load-bearing sides of the rigid framework of the power belt in the form of a flexible cloth associated with frames filled ballasting soil capacity, as well as retaining the rigid frame inclined and United at their corners with the upper longitudinal bearing sides of the transverse pipe flexible jumpers, fastened his middle in the zone of the longitudinal axis of symmetry with the power belt. PCBU provided with transverse end walls, and tanks for ballasting ground and power belt is made in the form of a single bending around the bottom of the lower longitudinal load-bearing side frame panels, the longitudinal side of which is connected to the upper longitudinal bearing sides of the inclined part. The longitudinal size of a panel exceeds the longitudinal size of the hard part, which is made of a collapsible and provided with transverse resporn the mi elements. The connection of the upper longitudinal sides of the framework with flexible jumpers, as well as the connection of the upper and lower longitudinal sides of the frame with the panel power belts are made with eyelets. Transverse end walls bonded with flexible jumpers, round the outside transverse sloping sides of the frame and fastened with a cloth power belts.

The presence of transverse end walls of the weighting guarantees the elimination of flowing soil ballasting weights in their group setting even if the mounting gap between the weights that prevents spillage and leaching ballasting of the soil under the weights and allows full use of the weight of the soil ballasting pipeline, adequate protection of its insulating coating and maintaining the temperature of the pipeline.

The invention is illustrated graphic material, in which figure 1 shows a cross-section of the pipeline laid on the part of the track with a calm relief; figure 2 - the pipeline laid on the part of the track, rugged hydrographic network, top view; figure 3 is the same, side view; figure 4 is shown the side view of the pipe laid in a trench dug at the junctions with opposing gradients of microrelief; figure 5 is a section a - a in figure 3; figure 6 is a variant of the laying of labor is aproved on the part of the track with a calm terrain; 7 - section b-b In figure 4; Fig - section b-B in figure 4.

The method is as follows. In permafrost soils on the transitions of the great length with quiet relief tear trench 1 in the active layer 2, depth, providing a semi-underground laying of the pipeline 3, i.e. depth, providing the location of the top of the pipe 3 is not below the level of the surface 4 and in excess of the upper generatrix of the level of the surface is not more than half of the diameter of the pipeline.

Before laying the pipe line the sides and bottom of the trench panels 5 from non-woven synthetic material (NCM) with overlap of their transverse pipe edges 6 and securing the longitudinal edges 7 on the berms of the trench by the pins 8. Trench fall asleep in two stages: first, the loosened soil by filling the sinuses fix the pipe in the trench, and further backfilling is carried out after the attachment to the pipeline ballasting devices. Before ballasting soil backfill 9 pipeline hang closely to the foam 10. Installation ballasting devices FPU pipeline is as follows. On the site of the pipeline hang a group of unfilled weights, it is possible bond between them adjacent sides of the rigid framework. rodolia bearing side of the hard part is movable from tubular elements, and the connection is made through the outer sliding sleeves or inner cylindrical inserts with the possibility of moving along the longitudinal bearing sides of the frame and fixing the pins in the holes formed respectively in the joined elements of the longitudinal sides of the rigid framework.

Make filling mineral ballasting ground cloth weights. Under the weight ballasting ground cloth elastically deformed and by exceeding their longitudinal dimension over the appropriate size of the hard part in the last-formed containers. The volume of soil accommodated in a separate weighting depending on the pipeline diameter is from 1.0 to 2.0 cubic meters per metre of pipe. The total load from the ballasting of the soil is passed through the panel - power belt weighting on the pipeline and fixes it in the trench on the project mark.

Soil backfill 9 forms a mound that protect the pipeline from external impacts, including atmospheric.

Based on the survey data to determine the catchment area, the direction of water flow and unit discharge for the area known mathematical dependences calculate the flow per unit length of the embankment, for example 1 km in light of these data to determine the distance between the culvert structures, skipping the first ability which is determined by known hydraulic formulas. In all formulas, the pressure is taken from the condition that the water level above the surface with the Nagorno side of the embankment of the pipeline should not exceed 0.1-0.2 m If you cannot determine the size and slope of the basin, the number of culverts is defined structurally rate of not less than one 1-2 km of the transition.

Protect the embankment from destruction carried out using known geotextile grids 11.

On the terrain with undulating nature of the terrain to the rugged hydrographic network terrain with slopes less than 30% trench tear in active layer depth, providing the location of the top of pipe is not above the level of the surface. Before laying the pipe line the bottom wall and berm trench panels from the MNC with the overlap of their transverse pipe edges and securing the longitudinal edges on the berms of the trench. Put it in a pipeline, it is fixed by the soil filling with the filling of the sinuses and fix the pipeline, ballestero its soil backfill placed in hung on the pipe close to each other foam or ballasting polymer container devices (PCBU) 12. Make the trench erosion of the walls of the panels of the MNC by formation of the transverse edges of each panel of the MNC Raven and 13, neck which is located down the watercourse, covers the pipe and fixed it by ensuring that the calculated values of the gap between the neck and the pipeline. Mount the funnel in the trench shall be exercised on its top soil backfill 14 with the formation of the angle of repose in the area of the funnel. This funnel is formed by an overlap of repose of the soil backfill 14 free lower edge of the cloth - overlap of the longitudinal edges of the cloth of the MNC, placing the foam or PCBU on the bottom of the funnel and with the subsequent dumping of protecting the piping of the embankment.

Possible consolidation of the pipeline in accordance with 6, when in the trench with the calculated step cut pits 15, block the pipe and the bottom of the pits panels of geotextile material 16 with ankerwyke elements 17. As a last possible using CT. Panels with high elongation predvaritelno pull and in the process of backfilling the trench with soil material panels obtains the estimated pre hood that enables the material of the panels into operation immediately upon the lifting of the pipeline.

The secluded hydrographic network of the route and at the junctions with opposing gradients of microrelief use of erosion control sheets 18, and the erosion of the walls of them create th the laying of the pipeline by forming each towel a funnel 13, neck which is located down the watercourse, covers the pipe and fixed it by ensuring that the calculated values of the gap between the neck and the pipeline.

The fastening of the longitudinal edges 7 of towels on the berms of the trench is performed by the pins 8 and towels in trench 1 - soil backfill from the top of the watercourse and the angle of repose of 16 soil in the area of the funnel, leaving free the increased width of the lower edge erosion towels. The lower part of the funnel formed by the overlap of repose of the soil backfill the lower extended edge erosion towel and tie it around the pipe, and the upper part of the funnel formed by the overlapping of the longitudinal edges 7 erosion towels and have it above the ground water level in the trench. Erosion towel is made of panels of the MNC, the transverse edge of which is provided with a longitudinal axial section and to extend the edge of the cloth is sewn into the insert of a material identical to a material of the cloth, with sewn-in cloth MNC insert has a triangular shape.

When laying pipe in a trench reduced depth mound of soil backfill 9 above the pipe will interfere with the natural flow of surface waters. After snowmelt or summer-autumn rains with the OK of water along the trench goes to low places, where it is necessary to organize flowed water through the spillway for the future, its current down slope. Spillway can be performed by known recommendations, for example, of metal or concrete pipes. When the gas pipeline crossing the bed of a stream or river flowing into the trench counter-slope water should be allocated in a natural way. For this reduced space of the trench, crossing natural watercourse, arrange vodopropusknye construction. As a culvert or Vodopianov facilities are hung on the pipeline SE, for example, containers textiles (CT) 20 in combination with filling the trench erosion cylindrical gruntotsementnyh containers (KP) 21.

Laying pipe in a trench reduced depth reduces the amount of earthworks associated with the development of the trench in frozen soils, provides stability to the pipe in the horizontal plane, especially on the route turns, and reduces the volume of the embankment.

The invention is effective at a high level of groundwater and at a very low bearing capacity of the upper soil layer.

At the same time, the invention eliminates possible damage to the insulation coating of the pipeline under the influence of atmospheric factors - the destruction of the isolation trubor the water from exposure to radiation of the sun, - and also eliminates the change in the temperature regime of the pipeline and its thermal deformation.

1. The method of construction of the pipeline in permafrost soils on the terrain with undulating nature of the terrain, which consists in the passage of the trench, laying of pipeline, its fixing and binding on the project marks a soil backfill, characterized in that the transitions with quiet relief trench tear in active layer depth, providing the location of the top of pipe is not above the level of the surface before laying the pipe line the sides and bottom of the trench sheets of non-woven synthetic material (NCM) with overlap of their transverse pipe edges and securing the longitudinal edges on the berms of the trench and the soil backfill is placed in hung on the pipeline close to each other ballasting polymer-panel devices (SRD) with subsequent filling protects the piping of the embankment.

2. The method according to claim 1, wherein the ballasting PUF contains imposed on the pipeline power belt in the form of a flexible panel attached to its longitudinal edges of one of its adjacent to the pipeline longitudinal side of the pair of rigid frames associated with them and fill ballasting soil containers made of flexible material, and the e flexible elements, holding rigid frame inclined, with tanks for ballasting of the soil and these flexible elements are in the form of a single upper relative power zone panel and connected to the latter means, and the longitudinal edges - with the free longitudinal sides of the rigid frame, the corners of which are fixed to the corners of the top panel, while the longitudinal dimension of the upper cloth exceeds the longitudinal size of the hard part, the upper panel is equipped bonded with its transverse edge of the hinged apron, and the transverse size of the upper cloth in excess of the amount of power belts.

3. The method of construction of the pipeline in permafrost soils on the terrain with undulating nature of the terrain, which consists in the passage of the trench, laying of pipeline, its fixing and binding on the project marks a soil backfill, characterized in that the secluded hydrographic network terrain with slopes less than 30% trench tear in active layer depth, providing the location of the top of pipe is not above the level of the surface before laying the pipe line the bottom wall and berm trench panels from the MNC with the overlap of their transverse pipe edges and securing the longitudinal edges on the berms is ransei, soil backfill placed in hung on the pipe close to each other foam or polymer containers-container ballasting devices (PCBU), create a trench erosion of the walls of the panels of the MNC by formation of the transverse edges of each panel of the MNC funnel, the mouth of which is located down the watercourse, covers the pipe and fixed it by ensuring that the calculated values of the gap between the collar and the pipe, and fastening funnel in the trench shall be exercised on its top soil backfill with the formation of the angle of repose in the area of the funnel, while the funnel is formed by an overlap of repose of the soil backfill free lower edge of the cloth - overlap the longitudinal edges of the cloth of the MNC, placing the foam or PCBU on the bottom of the funnel and with the subsequent dumping of protecting the piping of the embankment.

4. The method according to claim 3, characterized in that the amount of overlap overlap transverse to pipe the edges of the panels from the MNC appoint conditions shelter berms and slopes of the trench in the formation area of the funnel of the adjacent panels of the MNC.

5. The method according to claim 3, characterized in that the polymeric container ballasting device PCBU) for pipes comprises a pair of symmetrical relative to the longitudinal axis of the pipeline filled ballasting soil and the implementation is built from panels of flexible material containers, United imposed on the pipeline power belt and a pair of flexible external power jumper attached to the outer corners of the rigid planar rectangular frame forming the frame of the tank and in contact with the pipe inner longitudinal sides, and bottom of tanks and weight belt is made from a single imposed on the pipeline, a panel of flexible material passing under the inner longitudinal sides of the flat part, fixed at their outer longitudinal sides of the longitudinal edges of the lugs and provided with an additional, above panel power belts and the envelope of the inner longitudinal side of the flat part of the plate, the longitudinal edges of which re-imposed on the pipeline and lapped over top of the pipe, and the external power jumper made in the form of multilayer films, the ends of which are provided with eyelets, double cloth pads, power zone, and the external power jumper is bonded into imposed on the pipeline their middle part, the end walls of the containers are made of sewn into the bottom of the tank walls and suspended his eyes on the face of the transverse sides of the framework, and to make the best use of the soil backfill external power jumper equipped bonded with them more end walls with the possibility of their institutions inside the containers.

6. The method of construction of the pipeline in permafrost soils on the terrain with undulating nature of the terrain, which consists in the passage of the trench, laying of pipeline, its fixing and binding on the project marks a soil backfill, characterized in that the secluded hydrographic network of the route and at the junctions with opposing gradients of surface before laying the pipe line the bottom wall and berm trench erosion towels with overlap of their transverse pipe edges and securing the longitudinal edges on the berms of the trench, the soil backfill placed in containers hung on the pipeline protosemantic mass (SE) of technical fabrics, to create in the trench erosion of the walls of erosion of towels by the formation of transverse edge of each towel a funnel neck which is located down the watercourse, covers the pipe and fixed it by ensuring that the calculated values of the gap between the collar and the pipe, and fastening funnel in the trench shall be exercised on its top soil backfill with the formation of the angle of repose in the area of the funnel, leaving free the increased width of the lower edge erosion towels, while the funnel is formed by overlapping the natural slope of the soil backfill free bottom edge erosion towels - overlap the longitudinal edges erosion towels with the placement of goo on the bottom of the funnel, the upper part of the funnel have above ground water level in the trench, and in low wet areas at the intersection of opposing gradients in the trench arrange culvert or vodopropusknye structure.

7. The method according to claim 6, characterized in that the erosion towel is made of panels of the MNC, the transverse edge of which is provided with a longitudinal axial section and to extend the edge of the cloth is sewn into the insert of a material identical to a material of the cloth.

8. The method according to claim 6 or 7, characterized in that the sewn-in cloth insert has a triangular shape.

9. The method according to claim 6, characterized in that as a culvert or Vodopianov facilities are hung on the pipeline GU for example containers textiles (CT) in combination with filling the trench erosion cylindrical gruntotsementnyh containers (KP).



 

Same patents:

FIELD: construction engineering; erection of pipe lines in thawing permafrost soils and in flooded areas.

SUBSTANCE: proposed method includes ditching at trench with widened areas located at definite distances and pipe line is laid on bottom of trench. Pipe line is covered with flexible rugs and bottom of trench at widened areas is also covered with rugs; edges of rugs are fastened in widened areas and trench is filled. Used as anchor member are cylindrical textile containers placed in lugs of flexible rugs in parallel with pipe line and filled with soil. Prior to fastening the edge sections of flexible rugs, each of them is tightened at fixation of tension; preliminary tension of edge sections is effected during filling the widened areas and trench soil ensuring contact of flexible rugs with bottom of widened areas and trench. Filling the widened areas and trench is performed in direction towards pipe line, symmetrically relative to it.

EFFECT: enhanced reliability of attachment of pipe line at 0required marks.

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EFFECT: provided automatic cyclic action of the pneumatic percussion mechanism.

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FIELD: construction, applicable for trenchless laying and replacement of underground pipe-lines.

SUBSTANCE: a reciprocating striker is positioned in the casing of the pneumatic percussion mechanism. The air-distributing system of the mechanism includes the front and rear working chambers, inlet and exhaust valves and a fixture for closing and opening of the exhaust channels made in the form of a spring-loaded end face stopper coupled to a tractive member. At actuation of the pneumatic percussion mechanism, before the supply of compressed air, the exhaust channels are closed, they are opened after the inner cavities of the pneumatic percussion mechanism are filled with compressed air.

EFFECT: provided automatic cyclic action of the pneumatic percussion mechanism.

3 cl, 3 dwg

FIELD: construction engineering; erection of pipe lines in thawing permafrost soils and in flooded areas.

SUBSTANCE: proposed method includes ditching at trench with widened areas located at definite distances and pipe line is laid on bottom of trench. Pipe line is covered with flexible rugs and bottom of trench at widened areas is also covered with rugs; edges of rugs are fastened in widened areas and trench is filled. Used as anchor member are cylindrical textile containers placed in lugs of flexible rugs in parallel with pipe line and filled with soil. Prior to fastening the edge sections of flexible rugs, each of them is tightened at fixation of tension; preliminary tension of edge sections is effected during filling the widened areas and trench soil ensuring contact of flexible rugs with bottom of widened areas and trench. Filling the widened areas and trench is performed in direction towards pipe line, symmetrically relative to it.

EFFECT: enhanced reliability of attachment of pipe line at 0required marks.

13 cl, 4 dwg

FIELD: construction engineering; erection of pipe lines in permafrost soils at alternating terrain.

SUBSTANCE: trench in smooth terrain and in sections cut by hydrographic net is dug in active layer at depth sufficient for location of upper generatrix of pipe line above level of daily level. Prior to laying the pipe line, bottom walls and berms of trench are lined with cloth of non-woven synthetic material. backfill soil is placed in ballasting polymer panel-type devices or in ballasting polymer container-type units suspended from pipe line. Anti-erosion partitions made from non-woven synthetic material are formed in sloping sections together with funnel whose neck is located downward of water flow embracing the pipe line at specified clearance between neck and pipe line. Funnel is formed by covering the natural slope of backfill soil by free lower edge of non-woven synthetic material with ballasting polymer panel-type or ballasting polymer container-type devices placed on lower portion of funnel followed by subsequent removal of embankment protecting the pipe line. As far as sections of route cut by hydrographic network are concerned, anti-erosion partitions are formed in trench at transients with opposite slopes of microterrain; anti-erosion partitions are made from anti-erosion cloths and backfill soil is placed n soil-filled weighting materials attached to pipe line. At low points where opposite sections cross, water pass or water bypass structure is formed in trench.

EFFECT: enhanced reliability; reduced scope of earth-moving work; enhanced stability of pipe line in horizontal plane.

9 cl, 8 dwg

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EFFECT: reduction of tractive force.

5 dwg

FIELD: construction engineering; erection of underground pipe lines in permafrost soils, in bogs and in flooded and marshy areas.

SUBSTANCE: proposed polymer container ballasting unit has two distance rigidity frames located on both sides from pipe line, reservoirs made from polymer commercial cloth and filled soil which are secured to said frames, anti-erosion partitions and upper and lower weighting belts. Distance rigidity frames are curvilinear in form and their height exceeds diameter of pipe line being ballasted. Bend of each frame is made at obtuse angle and lower part of each frame is inclined towards pipe line relative to trench bottom. Polymer commercial cloth laid along pipe line makes distance frame rest against ground of trench bottom both in filling the reservoirs with soil and at action of pushing-out load.

EFFECT: extended functional capabilities.

3 cl, 1 dwg

FIELD: laying or reclaiming pipes.

SUBSTANCE: method includes removing upper layer of spoil, developing side trench with disposal the spoil by damping. The development of side trenches is performed step-by-step. The stripped trench is provided with stripping machine, the side trench are deepened by the working members of the stripping machine below the bottom of the pipeline and pipeline is continuously stripped by trenching machine and stripping machine when it moves forward. The stripping machine has frame with running carriages, clamps, supporting members and mechanism for forward motion.

EFFECT: enhanced efficiency.

3 cl, 4 dwg

FIELD: construction.

SUBSTANCE: pipeline is laid on the concave part of the longitudinal section of the trench bottom on the layer of soft soil and is locked by filling one or two layers of soil with compacting. Screw vertical anchors and load-carrying belts are then mounted. Before filling the trench, the space between the belt and pipeline is provided with a cloth of unwoven synthetic material.

EFFECT: enhanced reliability of pipeline locking.

4 dwg

FIELD: pipeline transport.

SUBSTANCE: flexible pipeline comprises several pulp lines provided with chambers with ball check valves and interconnected through piping diaphragms. The outer surface of the pulp line is provided with a displacement device for movement along the pipeline. The sections of pulp lines receive shell made of layers of syntactic and polyurethane, the ratio of thicknesses of which is (10-4):1. The displacement device affects the piping diaphragm, pumps hydraulic mixture from the bottom section to the next one which is arranged above the check valve, and moves along the outer side of the pulp line to the next piping diaphragm mounted above.

EFFECT: expanded functional capabilities.

3 dwg

FIELD: construction.

SUBSTANCE: pipeline has triply connected supports mounted on the stable sections above and under the slope subject to creep, one connected supports arranged over the subject to creep slope, and deformation compensator. The distance between the upper support and site of the deformation compensator arranged below the slope subject to creep is determined from the formula proposed.

EFFECT: enhanced reliability of the pipeline.

2 dwg

FIELD: construction.

SUBSTANCE: working member comprises rotors provided with teeth arranged symmetrically with respect to the axis of pipeline and provided with drive and mechanism for bringing the rotors together and moving them apart. Each rotor is provided with cleaning device which is arranged behind the rotor and secured to the unmovable segment of the working member for keeping it unmovable or permitting rotation. The cleaning members permanently co-operate with the outer side of the rotor.

EFFECT: enhanced efficiency.

1 dwg

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