Method of trenchless installation of pipes in soil
SUBSTANCE: method includes submersion of a pipe into soil with an open end, formation of a soil core in it and its removal from the pipe with the supplied fluid medium by means of breaking and squeezing out in parts. The fluid medium is supplied into the soil core at the outer side of the submerged pipe, using the channel of connection between the pipeline for supply of the fluid medium and the inner cavity of the submerged pipe.
EFFECT: increased efficiency due to reliability of soil core removal by means of creation of conditions to preserve integrity of a broken part of the soil core.
5 cl, 3 dwg
The technical solution relates to mining and construction technology and can be used for trenchless installation of underground utilities.
The known method of trenchless laying of pipelines in the ground (see NA Kershenbaum and V. Minaev. Drilling horizontal and vertical wells shock method, M Depths. 1984, p.36-37), wherein the pipe has an inbuilt hydraulic fill pipe line, made in the form of a pipe, plunge into the ground open end, is formed in the above-mentioned hydraulic fill pipe line earth core and remove it through the same hydraulic fill pipe line through isolation and expression in installments, as its formation fluid medium under pressure (compressed air)is supplied to the separation zone through the annulus between the dip tube and hydraulic fill pipe line.
The disadvantage of this method is the most anagreement process of immersion of the pipe due to the significant joint drag submersible pipes and soil core in the hydraulic fill pipe line due to the large degree of compression, which increases the friction of the soil core on the inner surface of the immersion pipe and the growth of resistance in the immersion process.
The closest in technical essence and essential features is a method of trenchless laying of the pipeline in the ground by the RF patent №2116405, 02F 5/18, op is nl. 27.07.1998, in which the tube is immersed in the soil open end formed therein earth core and remove it by tearing and squeezing through the same pipe in installments, as its formation fluid medium under pressure supplied through the injector, which is injected directly into the earth core.
The disadvantage of this method is that the location of injector inside of the tube contributes to the destruction of soil core in the process of its removal leads to depressurization extrusion cavity formed between the bottom and excavated soil core, and, ultimately, to stop soil core in the dip tube. This reduces the reliability of the process of cleaning the pipes from the soil core and method of trenchless laying of the pipeline in the ground.
Solved the technical problem is to increase the efficiency of the method for the reliable removal of the soil core by creating conditions for preserving the integrity of the excavated part of the soil core.
The problem is solved due to the fact that in the method for trenchless laying of pipes in the ground in which the pipe is immersed in the soil open end formed therein earth core and remove it from the pipe supplied fluid medium by separation and extrusion parts, the flow of fluid in the earth core is performed with the external side of the dip pipe, use the UYa channel of communication between the pipe for supplying the fluid and the internal cavity of the dip pipe.
The gap part of the soil core by the flow of fluid from the outer side of the immersed pipe improves the efficiency of the method for the reliable removal of the soil core by creating conditions for preserving the integrity of the excavated part of the soil core and the absence of any elements inside the submersible pipe.
Suitable as a communication channel to use a radial hole in the wall of the front end of the immersion pipe which is connected to the pipeline for supplying a fluid medium. This simplifies the implementation of the method and reduces time spent on preparatory work, which increases the efficiency of the method.
Suitable as a communication channel to use radial holes in the wall of the front end of the dip tube connected to the annular chamber formed by this end and a nozzle installed on it, with a pipe for supplying a fluid medium is connected to the nozzle. The nozzle will be distributed evenly around the perimeter of the fluid, which will lead to more reliable separation of part of the soil core and the preservation of its integrity.
Suitable fluid medium to serve as portions of the liquid with astringent properties, squeezing gaseous environment. Pungent liquid will seal the gaps between the immersion pipe and the excavated part of the soil core, is also imbued with earth core, and strengthen its internal communication and improve its integrity during the removal process. Submission of binding liquid portion, extruding gaseous environment, will minimize its consumption, the effort to oust the excavated part of the core will perform the following for binding liquid pipeline gaseous environment.
It is advisable to apply the fluid with anti-friction properties during the immersion pipe. The flow of fluid with lubricating properties in the zone of contact between the inner surface of the immersion pipe and the soil core as the immersion tube into the soil will reduce the resistance created by the friction, and increase the length of the open part of the soil core. This will improve the efficiency of the method by reducing cleaning cycles submersible pipe from the soil core.
The essence of the technical solution is illustrated by specific examples of the method for trenchless laying of pipes in the ground and the drawings figure 1-3.
Figure 1 shows a diagram of the isolation fluid medium part of the soil core and remove it from the dip tube with the communication channel in the form of radial holes in the wall of the front end of the immersion pipe. The vertical arrow shows the flow of the fluid in the pipeline, and the horizontal direction of application of force to the Tr shall be in the process of its dive.
Figure 2 shows the same circuit with a communication channel in the form of radial holes in the wall of the front end of the immersion pipe connected with the annular chamber formed by this end and a nozzle on it.
Figure 3 shows the same diagram with the capacity to supply liquid portion with astringent properties, squeezing gaseous environment.
The method for trenchless laying of pipes in the ground is implemented as follows.
Submersible pipe 1 (hereinafter pipe 1) open end immersed in the soil by any known method (pushing force F, shock, etc). The soil enters the inner cavity of the pipe 1 (Fig 1) and forms the earth core 2 (hereinafter - the core 2). Increasing the length of the core 2 because of the formation of dirt tube immersion tube 1 is slowed down to a complete stop. To fix the tube in the core 2 through the communication channel in the form of radial holes 3 through the pipe 4 serves the fluid, which removes the portion of the core 2. On the torn part of the core 2 force created by the pressure formed in the extrusion chamber 5. Under the action of this force the severed portion of the core 2 is extruded toward the end of the tube 1 opposite to the bottom, until logoff. Further, the described process is repeated until the complete immersion of the pipe 1.
When used as a communication channel radial holes 3 (figure 2) in the front wall is about the end of the pipe 1, connected to the annular chamber 6 formed in this end and the nozzle 7 installed on it, fluid in line 4 enters the annular chamber 6 and further to the core 2 through the radial holes 3 in the pipe 1. This allows for better separation of the core 2.
When used as a fluid liquid with astringent properties, squeezing gaseous environment, its from the tank 8 (figure 3) serves to line 4 through the communication channel in the core 2 for the separation of its parts. Liquid with astringent properties seal the gap between the inner surface of the pipe 1 and the severed part of the core 2, and impregnating the core 2, strengthen its internal communication. Further, the extrusion part of core 2 carry out gaseous environment.
You can also use the fluid with lubricating properties. Low pressure, precluding separation of the core 2, the fluid is fed through a channel in the contact zone of the core 2 with the inner surface of the pipe 1 during its dive. This serves to reduce the intensity of the immersion pipe 1 due to the decrease of the friction force in a pair of pipe - to-core and increases the length of the open side of the core 2. More than core 2 enters the inner cavity of the pipe 1 until the formation of soil plugs, the less it is necessary to make its removal.
1. The trenchless method use is ADCI pipes in the ground, when the tube is immersed in the soil open end formed therein earth core and remove it from the pipe supplied fluid medium by separation and extrusion parts, characterized in that the fluid is served in a soil core from the outer side of the immersion pipe, using the channel of communication between the pipe for supplying the fluid and the internal cavity of the dip pipe.
2. The method according to claim 1, characterized in that the quality of the communication channel using a radial hole in the wall of the front end of the immersion pipe which is connected to the pipeline for supplying a fluid medium.
3. The method according to claim 1, characterized in that the quality of the communication channel using the radial holes in the wall of the front end of the dip tube connected to the annular chamber formed by this end and a nozzle installed on it, with a pipe for supplying a fluid medium is connected to the nozzle.
4. The method according to any one of claims 1 to 3, characterized in that the fluid is served in the form of a liquid portion with astringent properties, squeezing gaseous environment.
5. The method according to any one of claims 1 to 3, characterized in that serves the fluid with anti-friction properties during the immersion pipe.
FIELD: machine building.
SUBSTANCE: device includes a pipe-destructing working element with two disc knives, a reamer for enlarging the well diameter, an attachment device of a new plastic pipeline and a tie-rod element in the form of a rope with elements installed on it. Each element installed on the rope is made in the form of a detachable sleeve with three equally spaced radially oriented cylindrical rods, in each of which a fork with a ball is installed so that fixed radial movement is possible. A radial slot is made throughout the length of detachable sleeve between adjacent cylindrical bars; a retaining screw is inserted in a threaded hole in the middle of the above radial radial slot. The pipe-destructing working element is made in the form of an assembled two-section framework, the centre of the rear end face of which has a spherical slot. The reamer is made in the form of an assembled two-section flattened cone, the centres of both end faces of which have spherical slots The rear end face of the pipe-destructing working element and the front end face of the reamer are connected by means of a hinge joint consisting of a pin, on both ends of which balls are installed by means of a thread The rear end face of the reamer and the attachment device of a new plastic pipeline are connected by means of a hinge joint consisting of an additional pin, on one end of which a ball is installed by means of thread and inserted in the spherical slot of the rear end face of the reamer, and the other end of the additional pin is installed in an axial hole of the attachment device of the new pipeline and fixed with a nut
EFFECT: improving reliability of hinge joints and a tie-rod element at passage of curved sections of pipelines.
SUBSTANCE: proposed method comprises driving the trench to accommodate therein the protective jacket to receive the pipeline thereafter. Before driving said trench, in front of motor road or railway said protective jacket is placed to accommodate rotary screw with detachable cutting element at its end face directed toward the road. Cutting tool diameter equals protective jacket OD. Screw length exceeds that of protective jacket, screw extension being directed from the road. Screw shaft is engaged with rotary drive placed at slide rails provided with semicircular ledge arranged atop said rails and directed toward protective jacket above said screw, its end and jacket ends are jointed together by flanges to be bolted together. Slide rails are to be fixed relative to drive by "П"-like bracket secured at drive frame to thrust against slide rails rear end and to surround them from both sides. Then, screw drive is switched on to displace slide rails with revolving screw and protective jacket toward the road so that said jacket penetrates into soil to get completely buried therein. Then, said cutting element and bolts are removed from screw end. Then said screw is withdrawn from said jacket to fit main pipeline section therein.
EFFECT: safe and reliable laying, lower costs and labor input.
SUBSTANCE: installation comprises a frame, a carriage with a control unit arranged on it with a technological adapter, a hydraulic cylinder connected by the body to the frame, and with the stem to the carriage, at the same time the frame has guides for carriage rollers. The frame is made of the carriage frame and the hydraulic cylinder frame connected to each other.
EFFECT: increased reliability of operation and reduction of time for installation assembly and disassembly, increased volume of working space in a well and increased efficiency of performed works due to placement of a hydraulic cylinder with stem length that is larger than in a prototype outside the limits of the well, and whenever it is required to increase force characteristics.
3 cl, 2 dwg
SUBSTANCE: method in accordance with the first version includes formation of a pilot well along a design axis of the installed utility, expansion of the pilot well to the design diameter by damage of soil with the help of a working element connected with a drilling rod, and transportation of products of damage by means of a pipeline connected with a free end of the working element as the latter rotates around the longitudinal axis, for this purpose pressure is pulled at the open end of the pipeline below the atmospheric pressure with the help of a vacuum-forming device. The method in accordance with the second version differs from the method in accordance with the first method by the fact that transportation of damage products is carried out with the help of a drilling rod.
EFFECT: increased efficiency of a working process due to usage of process equipment, principle of operation of which provides for rational use of installed capacity.
3 cl, 2 dwg
SUBSTANCE: device comprises a body, a working organ, a mechanism of tunnelling direction control, which is made in the form of a tip installed in the front part of the body with the possibility of angular displacement, connected with a piston, a spring, a chamber, connected with channels for energy resource supply, and a navigation device fixed in the body, besides, the spring with its rear end is fixed on the front end of the piston, and with the front end - on the body, at the same time the read end of the piston contacts with the specified chamber.
EFFECT: arrangement of a tunnelling direction control mechanism inside a device body prevents negative effect of soil in process of well tunnelling.
3 cl, 4 dwg
SUBSTANCE: device for formation of wells in soil by the method of piercing comprises a hollow working tip of conical shape fixed on the front end of a pressure rod in direction of piercing and a feeding mechanism. In the wall of the hollow working tip there are holes, and on its outer surface there is an elastic impermeable shell fixed to the top and the base of the working tip. The inner cavity of the working tip is tightly connected to the hollow pressure rod, the other end of which is connected with a source of pulsating liquid or gas.
EFFECT: increased efficiency.
SUBSTANCE: device for trenchless laying of pipelines by piercing comprises a working tip of conical shape, a vibrator of circular oscillations of which is arranged in the form of an electric motor with a hollow shaft, the stator of which is fixed in the working tip, and the rod is installed inside the hollow shaft, having a displaced centre of gravity relative to the axis of rotation, at the same time the rod is fixed on the flange, which is mounted on the front end of the laid pipeline along the piercing direction. The rotation device is arranged in the form of a cover with a hole, rolling in displaced surfaces of the rotating eccentric reciprocally moving along the longitudinal axis of the rod.
EFFECT: higher accuracy of pipeline laying.
SUBSTANCE: device for trenchless installation of pipelines, comprising a guide body arranged on telescopic supports with a cut upwards, made of a 2/3 diameter of the pipe in the form of a hemisphere reinforced with stiffening ribs, having inside the welded thrust plates at the distance equal to the length of the power hydraulic cylinder stem, windows for soil discharge, stop wedges, a grip, differing by the fact that a carriage made as telescopic of double-sided action, having thrust sliding plates, an opening for soil transportation, is arranged inside the guide body transferring the force of power hydraulic cylinders installed on the telescopic carriage of the double-sided action.
EFFECT: higher efficiency of labour, expanded range of installed pipelines diameters, lower labour intensiveness.
FIELD: oil and gas industry.
SUBSTANCE: combined air-impact device includes a needle fixed in head part of the housing, working and auxiliary chambers separated with a spool valve with calibrated channel for connection of the above chambers, calibrated channel for connection of auxiliary chamber to atmosphere at the corresponding position of spool valve, stepped longitudinal channel for arrangement in the latter of differential piston and check valve, and which opens discharge ports of the working chamber periodically. Device is made in the form of combined structure containing front and rear housings with compressed air pulse escape mechanism and shank of two nipples connected to each other; at that, exhaust openings of working chamber in front housing of the device are oriented at design angle within more than 90°, but less than 180°, and in rear housing at design angle within more than 0°, but less than 90° relative to shank part from longitudinal axis of combined structure, and shank with air-distributing mechanism for compressed air supply at design pressure P1 or P2 to auxiliary chambers of the device and consisting of spring-loaded stock-piston with central and transverse channels and system of air-distributing channels supplying the compressed air to auxiliary chamber of front and rear housings with possibility of alternating supply to them of compressed air at pressure P1 or P2 at the corresponding position of stock-piston in the shank.
EFFECT: increasing operating efficiency of the device.
SUBSTANCE: device for trenchless installation of pipelines by means of piercing comprises a hollow working tip of conical shape connected via a hinged joint and a support of rotation with a shaft, installed in rotation supports on a flange, which is mounted on the front end of the installed pipeline, in direction of piercing, a vibrator of circular oscillations, a vibrator drive installed in the laid pipeline and a feed mechanism. The vibrator of circular oscillations is arranged in the form of movable weights capable of radial displacement in guides rigidly fixed on the shaft, at the same time movable weights via solids of revolution are pressed by means of springs to the inner conical surface of a ring, installed in a hollow working tip capable of axial displacement by "screw-nut" transfer.
EFFECT: higher efficiency of device operation in soils with various physical-mechanical properties.
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: mining industry.
SUBSTANCE: method includes expanding guiding pipeline by extracting soil from around it by driving shield with rotor working implement. Soil is extracted to value, surpassing needed outer diameter of shield cover. Forming ring-shaped space inside tunnel mine is compacted from back side and continuously filled with liquid. Concurrently sedimentation of extracted soil is drained from lower portion of face. Displacement of driving equipment relatively to guiding pipeline is performed along soft trajectory. Device has means for driving guiding pipeline and driving shield with rotor working implement. Rotor working implement is mounted on body of driving shield. Front surface of working implement with cutters extends beyond outer contour of shield cover, provided with back end compaction. Device is provided with fluid pump device. Force hose of pump is outputted from upward portion beyond outer contour of shield cover. Device for transporting extracted soil from face is made in form of suck-in hose connected to pump device and to lower portion of ring space beyond rotor working implement.
EFFECT: lower transverse loads on guiding pipeline.
2 cl, 1 dwg
FIELD: building, particularly for laying pipelines, for constructing buried passages during pipeline laying, laying cable lines and power lines.
SUBSTANCE: device has hollow conical working tip connected with stem through hinge and through rotary support. Stem is secured in rotary supports to flange mounted on front end of pipeline in the line of puncture direction. Installed in pipeline to be laid is vibrator drive connected to stem. Device has cage connected to stem, vibrator forming circular vibrations and made as unbalance. Unbalance is formed as hollow cylinder sector arranged inside working tip on rotary supports and connected to cage. Device also includes feeding mechanism.
EFFECT: increased operational efficiency.
FIELD: metal pipe driving.
SUBSTANCE: according to proposed method including change of value of backward stroke of striker interacting with operating resilient member and working liquid and stepless change of working liquid pressure at which striker changes from backward to forward stroke by changing force of preliminary compression of setting resilient member interacting with valve, it is proposed to control additional speed of valve forward stroke so that time of valve closing be not less than time of forward stroke of striker. Adjustable hydraulic impact machine contains striker unit and impact energy control device. Striker unit includes housing accommodating first working chamber, striker and operating resilient member. Impact energy control device is made in form of housing with second working chamber and valve interacting with setting resilient member. First and second working chambers are hydraulically coupled. Impact energy control device should be preferably equipped with valve forward stroke speed regulator including hydraulically independent shock-absorbing chamber with shock-absorbing liquid divided into upper and lower parts by ring-shock-absorbing piston arranged on valve. Upper and lower parts of shock-absorbing chamber are interconnected through channels, shutoff valve and restrictor.
EFFECT: enlarged sphere of application and improved reliability in operation.
3 cl, 1 tbl, 1 dwg
FIELD: mining industry, particularly devices for trenchless pipeline laying under roads and other engineering structures.
SUBSTANCE: rig comprises power cylinder with hollow shaft and support, hauling mechanism connected to cylinder and executive tool cooperating with ground and rig operation control means. All above components are put into a pit. Executive mechanism is formed as conical tip connected with rod separated into several chambers and passing into shaft. Power cylinder is made as hydraulic one, hauling mechanism comprises washer with slot and slider arranged in the slot. Washer is rotary installed on the shaft and is restricted from longitudinal displacement. Slider has control arm and figured orifice including hexahedron part and circle part. Each rod chamber is provided with outer groove with hexahedron cross-section mating to hexahedron part of slider orifice. Roller is installed on washer periphery. Secured to support is cam cooperating with roller. The rig is provided with transportable container installed in the pit and having body, bottom and hinged lid. The body comprises orifice for rod receiving and rod guide arranged inside the body. Each rod chamber has outer tapered thread formed on one end part thereof and inner tapered thread formed on opposite end thereof and mating outer one. Rig operation control means is provided with control panel. Conical tip includes radio transmitter to transmit signal indicating rig location in ground. Radio signal receiver linked with control panel is installed above ground surface.
EFFECT: simplified structure and increased reliability.
3 cl, 4 dwg
SUBSTANCE: device comprises screw pivotally connected with the conical working tip without permitting mutual rotation. The tip receives vibrator for generating circular vibrations. The vibrator is made of unbalance mounted on rotating bearings inside the conical working tip and is connected with the motor through a flexible shaft. The motor is mounted inside the additional housing connected with the working tip through a flexible link.
EFFECT: enhanced efficiency.
FIELD: mining industry and building, particularly equipment for trenchless pipe laying under roads and other engineering structures.
SUBSTANCE: device comprises rod and hollow bush connected thereto and enclosing ends of longitudinal composite reamer sections. Radial cut is formed in hollow bush. Rod is composed of sections having equal lengths. Each section comprises outer conical thread created from one section end and inner thread corresponding to outer one formed from opposite section end. Each section has annular groove with length equal to hollow bush thickness. Hollow bush cut encloses outer annular groove. Each section of composite reamer is installed on rod section and supported in two points spaced along section length. Each support point is formed as two mating hexahedrons.
EFFECT: increased structure simplicity and reliability.
FIELD: trenchless underground pipe laying.
SUBSTANCE: invention relates to trenchless laying of underground pipelines of considerable length and preset trajectory. Proposed punch includes body accommodating reciprocating striker with bore in rear part, spool getting into bore by larger diameter step with sliding. Spool consists of branch pipe secured in rear part of body and sleeve connected with branch pipe for sliding and spring-loaded relative to rear part of body with at least one radial pin getting into ring zigzag slot made on part fixed on body. Sleeve of spool encloses front part of its branch pipe, being spool larger diameter step, and said ring zigzag slot is made on outer surface of branch pipe. According to first design version, at least one radial hole is made on front parts of branch pipe and spool sleeve. According to second design version, flats are made additionally on outer surface of branch pipe displaced towards rear part of branch pipe. According to third design version each second cavity on rear side of ring zigzag slot is extended to side of rear part of branch pipe.
EFFECT: improved reliability and increased service life owing to making of pneumatic punch of closed type with reversing of delivery of compressed air simply by switching off and on.
7 cl, 19 dwg
FIELD: mining and building, particularly for trenchless pipeline laying under roads and other engineering structures.
SUBSTANCE: device comprises retaining wall arranged in pit. The retaining wall is adapted to cooperate with power equipment and ground and is formed as movable container having dimensions and formed of material, which provide collapse of container brought into contact with ground. Movable container comprises bottom with processing orifice, vertical cylindrical wall with handling lugs and hinged lid. Power equipment and operator's station are arranged inside the container. Storage vessels are located in lower side parts of movable container.
EFFECT: decreased load applied to ground and reduced support size.
FIELD: mining and building equipment, particularly to drive pipes and form holes in ground for following underground service pipeline laying.
SUBSTANCE: device comprises body, reciprocating hammer arranged in the body and having throttle channel and orifices for air inlet and discharge, as well as elastic valve. Body and hammer define forward stroke and reverse stroke chambers communicating with air supply pipeline through connection pipe. Collar with longitudinal slots is created on rear hammer end and adapted to communicate reverse stroke chamber with atmosphere. Body interior has several ledges. Elastic valve is installed on hammer between collar and above orifices. When the hammer is in its extreme front position inner cylindrical surface of body ledge having lesser diameter is in contact with outer cylindrical surface of elastic valve.
EFFECT: reduced compressed air consumption and increased stroke power due to decreased reverse stroke chamber size and prevention of air compression inside the reverse stroke chamber during forward hammer movement.
2 cl, 1 dwg