Protective net, in particular for protection against fall or for slope reinforcement and method of its manufacturing
SUBSTANCE: invention is related to protective nets, intended for reinforcement of slope against fall, and to methods of their manufacturing. Net is made with diagonal plaiting and is woven of twisted wire strands bent in the shape of spirals, armature bundles or cords, which comprises two or more wires or twisted wire strands of steel. Method for manufacturing of protective net consists in the fact that twisted wire strand, cord or armature bundle is fed with a certain angle of lift at least to one bending mandrel of device and is bent at a certain length around bending mandrel approximately by 180°, then repeatedly moved along their longitudinal axis to bending mandrel at a certain length, bent accordingly around bending mandrel by 180° until this twisted wire strand, cord or armature bundle does not achieve shape of spiral, besides wire strand bent in the form of spiral, cord or armature bundle are woven together with the second twisted wire strand, cord or armature bundle bent in the form of spiral, and this is repeated until net is made with diagonal plaiting of desired value.
EFFECT: optimal fixation of slope is achieved, as well as damage danger is reduced.
9 cl, 4 dwg
The invention concerns a protective network, in particular to protect from fraying or to strengthen the slope, according to the restrictive part of paragraph 1 of the claims.
The protective network of this type is disclosed in EP-B-0979329. Protective network is designed as a diagonal braid with cells in the form of a parallelogram and a three-dimensional-like mattresses structure, which is woven from a single curved in the form of a spiral wire of high strength steel. Wire have high tensile strength, so that the braid saves the specified three-dimensional structure even in the stretched condition and can serve as coverage of the earth surface as fastening or stabilizer layers of vegetation. Wire mesh can be folded and occupies a small space for storage or transportation. Due to the high tensile strength wire bending, reducing the risk of descending loops when possible broken wire.
At the heart of this invention lies task even more to improve the protective network of the type mentioned at the beginning and greatly reduce the risk of damage.
This problem is solved according to the invention, by means of a protective network with signs of paragraph 1 of the claims.
Further preferred embodiments of the respective invention protective nets form the subject hung the number of claims.
Due to the fact that the protective net according to the invention is woven from a single bent in the shape of a spiral twisted wire strands, cables or wire bundles, which contain at least two wire or twisted wire strands) mainly from high-strength steel, creates a protective network with high strength, which practically prevents any deformation under load and without fixation of cells (for example, cross-type terminals).
Corresponding to the invention diagonal weave of twisted wire strands, cables or wire bundles can be virtually "infinite" in the rolls, and on the longitudinal sides of coils mainly provided by ductile boundary nodes in the form of anchor loops formed at the ends of the twisted wire strands, cables or wire bundles.
Hereinafter the invention is explained in more detail by means of drawings, on which:
Figure 1 is a top view of the cell corresponding to the invention a protective network
Figure 2 - protection network for a partial top view,
Figure 3 is a partial side view of the protective network according to Fig 1,
4 is a schematic view of the protective system of the network as a strengthening of the slope on the slope.
Figure 1 and figure 2 show, respectively, a protective network for fixing layer of the earth's surface, as nab, the emer strengthening of the slope or protection from the crumbling cliffs near the road or the like, which is made in the form, for example, rectangular diagonal weave 10 with four or polygonal cells 17. Diagonal weave 10 woven bent in the shape of a spiral twisted wire strands, cables or reinforcing beams 11, 12, 13, 14, which contain, respectively, two or more wires 22 of high-strength steel. You may to talk about two or more wires twisted together in a twisted wire strand, two or more related in the reinforcement beam wires, twisted into a twisted rope wire strands, or combinations of these elements.
Wire, according to DIN 2078, have a nominal strength between 1000 and 2200 N/mm2for example 1770 N/mm2. Could also use a wire of spring steel according to DIN 17223. The thickness of the wire depends on the required tensile strength and may be, for example, 3 mm
These wire 22, as a rule, galvanized, supplied with a coating of zinc and aluminum and/or plastic, or from a chromium alloy, to achieve the required corrosion resistance. For this purpose, for example, provided by the galvanized coating with a surface density of between 100 and 250 g/m2.
On the lateral ends of the netting 10 twisted wire strands, or wires, or reinforcing beams 11, 12, 13, 14, pairs flexibly connected to each other ankern the mi hinges 11”, 12, with the anchor loops 11", 12" established a cap on the end of the twisted wire strands or ropes, or steel beams 11, 12, 13, 14. Twisted wire strands, or wires, or reinforcing beams 11, 12, 13, 14, after they are bent in the anchor loops, additionally supplied mainly multiple wound around their perimeter loops 19 which are due to occur in the inserted state of tensile load on these anchor loops guarantee sufficient reliability against their disclosure.
Diagonal weave 10 is held with a certain tension on the earth due to sunk into the soil of fasteners 15. Preferably located on the upper and lower end of the netting 10 curved in the form of a spiral boundary rope, or regional twisted wire strand, or respectively of the edge reinforcing beam 11 is electrically connected to one wire or cable 21, which with his hand stretched fasteners 15 on the ground or the like, In principle, the fastening elements 15 could keep and also directly anchor loops 11'.
Separate curved in the form of a spiral twisted wire strands, cables or wire bundles 11, 12, 13, 14 have an angle α of lifting, and the length L between the two curves, which is Radelet shape and size of the cells 17 diagonal weaving 10. For angle α lifting angle is preferably selected from about 20 to 35°. Individual cells 17 respectively form a parallelogram, and the cell size is, for example, 77×143 mm This gives the advantage that the netting 10 is stretched slightly when it is displayed on the surface of the earth and pre-loaded in tension from the sides 21 in its longitudinal course. In addition, individual cells 17 form thus a parallelogram with an oblong hole, which eventually gives the advantage of lower permeability earthen material.
Separate twisted wire strands, cables or wire bundles 11, 12, 13, 14 are held movably relative to each other in a woven state, which has the result that the diagonal weave 10 may be formed or, respectively, to fold the carpet. Therefore, you need minor excavated area for storage and transportation of such tangles.
According to Figure 3 weave 10 has three-dimensional-like mattresses structure, which again is ensured thanks to the use of high-strength steel wires. Separate twisted wire strands, cables or wire bundles 11, 12, 13, 14 to this end bent in the form of a spiral and then woven together so that the formed thus weave 10, if cm is the third in cross-section, forms an approximately rectangular contour. So twisted wire strands, cables or wire bundles consist of curved parts 11' and the straight parts 11. This oblong rectangle has a thickness of 10' several thicknesses of wire or twisted wire strands. However, this wire mesh 10 is made in a pre-tensioned state is three-dimensional. This causes, on the one hand, increased spring property of weaving, as twisted wire strands, cables or wire bundles can stretch while increasing the tension in their longitudinal length and attach the mesh netting increased elasticity. On the other hand, through this three-dimensional structures for covering the surface of the earth, such as slope, reach additional support or stabilization laid in this braided layers of vegetation or cut surfaces.
Due to the fact that the protective network, according to the invention, woven from a single bent in the shape of a spiral twisted wire strands, cables or wire bundles that contain two or more wires of high strength steel, woven together in a twisted wire strand or in the reinforcement beam, or formed from two or more twisted wire strands of high-tensile steel, twisted together in a rope, created vysokoprochnaja network, which practically prevents any deformation under load and without fixation of cells (for example, cross-type terminals).
Corresponding to the invention diagonal weave of twisted wire strands, cables or wire bundles can be virtually "infinite" in the rolls, and on the longitudinal sides of coils mainly provided by ductile boundary nodes in the form of anchor loops formed by the ends of the twisted wire strands, cables or wire bundles.
However, fundamentally protective network can be made of twisted wire strands, reinforcing beams stranded cables with thinner or thicker wires, which are not manufactured or partially manufactured from high-strength steel.
Figure 4 shows the system corresponding to the invention a protective network 10, which is provided as the strengthening of 40 slope, for example, located on a steep hillside slope 45, which forms a protected surface of the earth.
This strengthening of 40 slope consists of decomposed to the desired area of the slope diagonal (wire) netting 10 and embedded in the ground fastening elements 15 with clamping weave 10 to the surface of the earth capture (claw) plates or the like For fastening elements 15 are famous ground is rock Lee swing enshrined mainly at regular intervals in the slope of the 45. In the upper and lower end of the netting 10 is provided, respectively, the cable 21 through which the netting 10 is stretched by tensile forces.
Using this system, the protective network to achieve optimal fixation of the slope. At the relevant invention perform a network can easily be seen even large shearing forces that occur due to the breaking away of stones or rock fragments in the slope.
If used according to the invention method of manufacturing a protective network 10, respectively twisted wire strand, steel beam, the cable 11, 12, 13, 14 or the like, is delivered to the first stage with a certain angle α of lifting at least one bending mandrel is not shown here, the device is bent at a certain length L around the bending mandrel of approximately 180°. In the next steps, twisted wire strand, steel beam, the cable 11, 12, 13, 14, etc. is repeatedly pushed for a certain length L along its longitudinal axis by bending mandrel 66 and respectively bent around the bending mandrel 180°, until this twisted wire strand, steel beam, the cable 11, 12, 13, 14, etc. will not accept a spiral shape. After you have received such curved in the form of a spiral twisted Provo the internal strands, reinforcing beams, ropes 11, 12, 13, 14 or so, they respectively are woven together with the second curved in the form of a spiral twisted wire strand, steel beam, a cable or the like, the second with the third, and this is repeated until then, until it is made of wire mesh to the desired value.
In the strands, reinforcing beams or cables are preferably used, at least partially, high strength wire. But it could have used a wire with lower strength. Given the fact that, compared with the individual wires can be used, for example, thicker reinforcing beams, you can improve overall strength.
1. Protective network, in particular to protect from fraying or to strengthen the slope, made of wire (22) with the formation of diagonal weaving three-dimensional structure, characterized in that it is woven of twisted wire strands, cables or wire bundles(11, 12, 13, 14), which contain at least two wires (22) or twisted wire strands of steel.
2. Protective net according to claim 1, characterized in that the twisted wire strands, cables or reinforcing beams (11, 12, 13, 14) is made at least partially of a high-strength steel.
3. Protective net according to claim 1 or 2, characterized in that the twisted wire strands, cables or reinforcing beams (11, 12, 13, 14) popen is movably connected to each other at their ends with anchoring loops (11", 12").
4. Protective net according to claim 3, characterized in that the twisted wire strands, cables or reinforcing beams (11, 12, 13, 14) after the bend in the anchor loops (11", 12") is further provided with at least one wrapped around their perimeter loop (19).
5. Protective net according to claim 1, characterized in that the wire (22), forming a twisted wire strands, cables or wire bundles(11, 12, 13, 14), are corrosion-resistant.
6. Protective net according to claim 1, characterized in that the wire (22), forming a twisted wire strands, cables or wire bundles(11, 12, 13, 14), have a nominal strength of from 1000 to 2200 N/mm2.
7. Protective net according to claim 1, characterized in that curved in the form of a spiral twisted wire strands, cables or reinforcing beams (11, 12, 13, 14) form a diagonal weave (10) with an angle (α) of the rise mainly from 25 to 35°.
8. Protective net according to claim 1, characterized in that it has deepened into the ground fastening elements (15) with clamping diagonal weave to the earth's surface clamping plates and at least on the surface retention and tensile diagonal weave rope (21).
9. A method of manufacturing a protective network of claim 1, wherein the twisted wire strand, rope or wire beam (11, 12, 13, 14) served with a certain angle (α) lifting at least one bending mandrel and bent on is definitely the length (L) around the bending mandrel of approximately 180°, then repeatedly advance along its longitudinal axis by bending mandrel at a certain length (L)curve, respectively, around the bending mandrel 180° up until this twisted wire strand, rope or wire beam (11, 12, 13, 14) does not form a helix shape, and curved in the form of a spiral twisted wire strand, rope or wire beam (11, 12, 13, 14) weave together with the second curved in the form of a spiral twisted wire strand, rope or wire bundle, the second with the third, and this is repeated until until will not be formed network with diagonal weave the desired value.
FIELD: constructional engineering.
SUBSTANCE: guard rail contains load-bearing racks to be installed along the perimeter of protected area. Load-bearing racks have metal mesh cloth placed thereon, made in the form of interconnected and consistently tightened along perimeter mesh panels of steel pretensioned wire with drawing strengthened skin with intersecting rods welded and hot-dip galvanised at iron and zinc ratio changing by skin direction in the range of 1:3 to 5:1000 respectively. The mesh cloth of vertical panels is fixed to racks by means of wire shackles, rods of adjacent mesh panels being interconnected with an overlap outside racks by means of metal plate clamps. Single clamp fastens adjacent net sections of guide unit, white double clamp attaches basic net section to vertical or horizontal net sections of tunnel-preventive covering and sections of forward and backward climbing shields. Welded joints of section mesh cloth are directed to outer side of guar rail. Guar racks are mounted from guar outer side. Section wire skin covers trengthened layer and have galvanised coating of density at of least 0.210 kg/m2. Strengthened section wire skin is produced by drawing. The racks design is simplified, accuracy of net effect detection is improved even in case of single damage, cost is lowered, maintenance service is simplified, parameters variety of net and racks coating is excluded, and thus improved reliability unter hard climatic conditions is provided.
EFFECT: construction of effective external guard rail; wider range of external guard rails.
16 cl, 11 dwg
SUBSTANCE: invention is related to methods of earth bed stabilisation, namely to methods for stabilisation of railway embankment. Method for stabilisation of embankment with retaining structures from steel corrugated sheets, in which steel corrugated sheets are submerged at least from one field side into soil within the limits of verge. Submersion is carried out vertically at the angle to longitudinal axis of embankment, in process of submersion, ruptures are left between corrugated sheets, corrugated sheets on top are combined with links. In areas of ruptures, vertical enclosure is installed to links, which retains soil and provides for verge of required width in this area.
EFFECT: improved stabilisation of embankment along the whole height of earth bed, higher efficiency of works on stabilisation of embankment in process of machined performance of operations for arrangement of retaining structures, widening of embankment on top with provision of verge of required width.
2 cl, 4 dwg
FIELD: textiles, paper.
SUBSTANCE: covering for reducing disturbance of matter particles with wind has the first layer made from large-meshed material and the second layer made from large-meshed material. The first layer is kept namely in fixed position relative to the second layer. Especially, covering is suitable for being used as helicopters' runway in conditions when dust, sand, snow, water or other particles or liquids can otherwise cause disturbance resulting in loss of visibility, damage or wear of helicopter's parts, and in harm to the people or equipment located nearby.
EFFECT: new type of covering used for reducing disturbance of matter particles and liquids with wind.
8 cl, 14 dwg, 2 tbl
SUBSTANCE: device for slope surface grouting includes solid geogrid consisting of interconnected sections. The geogrid cells are filled up with a filling agent. Polymer or metal ropes are passing through each cell in the direction of slope generatrix. In addition, the geogrid sections are connected to slope by anchor rods. At least one rope in one section is made so that its length is more than solid geogrid width and fixed with additional anchors at the ends. The said additional anchors are installed horizontally next to the top and along embankment bed. The anchor rods are isolated from ropes and fixed to additional anchors.
EFFECT: improved bearing capacity of slope grouting, slope surface protection from atmospheric and wind effects and local shear slides compensation in sub-surface part of slope - active area.
5 cl, 3 dwg
SUBSTANCE: invention pertains to hydraulic engineering of coast - protecting constructions. Coast protecting construction includes metal mesh arranged along the shore and secured with anchor supports standing proud from the body of the slope. Metal rods are placed over the metal mesh and are fastened in the intersection points between each other, with the mesh and with anchor supports. Anchor supports are made by installation of curbs in intersection spots of the metal rods, and filling them with concrete mixture, its further rodding, inleakage into the slope and freezing. Metal mesh is secured with anchors arranged on the slope. Metal rods are set forming cells, dimensions whereof make 1.0×1.0 m or 1.5×1.5 m.
EFFECT: enhanced operational reliability of the construction.
2 cl, 3 dwg
SUBSTANCE: invention refers to the sphere of construction in general and hydraulic engineering in particular, dealing with protection of aquatoria shores and hydraulic engineering structure slopes against wave and wind forces as well as ground slope or hillside consolidation. Each section of the ground slope or hillside being consolidated undergoes engineering-and-geological and geotechnical survey as well as surface vegetation clearance. Based on the survey findings one defines the range and depth of excavation into the solid and resistant mass of the slope soil or the hillside rock crack-free mass. Excavation is performed lengthwise along the whole of the section being consolidated without application of impact and/or vibration load onto the mass of slope soil or hillside rock. From the excavation sideways in the direction of at least one section being consolidated there are holes bored for embedment of anchors fabricated of wire cables or metal rods. The anchors are inserted through the boreholes from the excavation or from the surface of the section being consolidated with the cables and rods subsequently interconnected to form an integrated meshed metalwork. The cord/rod stretches laid inside the boreholes become pre-tensioned with the help of tension devices installed either in the excavation or on the consolidated section land surface. The pre-tensioned cord and rod stretches laid inside the boreholes are then fixed with a liquid curable polymeric material injected into the boreholes from the excavation. On the surface of the section being consolidated there is a meshed metalwork arranged filled with a liquid curable polymeric material poured into it so that to form a protective layer on its surface.
EFFECT: enhanced hardness and reliability of slope or hillside consolidation; possibility of the slope or hillside consolidation activities under the conditions of imminent soil slip commencement, soil/rock strata movement, fall, collapse or inrush, landslide, rockfall etc; reduction of the amount of mechanical, impact and vibration load applied to the slope/hillside masses of soil and/or rock.
5 cl, 3 dwg
FIELD: construction industry.
SUBSTANCE: method of landslide slope reinforcement by transferring potential slump block into rigid underground operated construction includes determination of length, width and depth of slump block as well as determination of adhesion, angle of internal friction and specific weight of soil of distorted horizon, wherein there is a flattened horizontal part of slump block sliding surface. In order to erect underground operated construction, soil is removed from potential slump block mass as per relief opening sizes: length L≥ℓ; width B≥b; depth H≥h-((2c·tg(45+ϕ/2))/γ), where L, B and H are length, width and depth respectively of relief opening /m/, ℓ, b and h are determined length, width and depth respectively of slump block; c, ϕ and γ are adhesion /kPa/, angle of internal friction /deg°/ and specific weight /kN/m3/ respectively of soil of distorted horizon, by reducing domestic pressure by deepening the opening for distorted horizon up to the value of its structural strength, and then there shall be continued removal of slump masses from slope top by levelling slump terrace and eliminating the possibility of shear forces occurrence. Opening depth and weight of underground construction can be controlled by increasing structural strength of distorted horizon under the opening bottom, e.g. by means of reinforcing solution injection up to strong layers with decreasing or increasing H, and increasing or decreasing domestic pressure or changing the allowable weight of underground construction in the above manner. Groundwater flows can be captured in underground construction and their level in surrounding soil masses can be reduced, and to underground construction frame or to its front wall there can be attached slump block body e.g. via anchors.
EFFECT: eliminating the hazard of deep earth slides activation and formation of new slump blocks, and effective use of slump-hazardous area and underground space.
4 cl, 2 dwg, 1 ex
SUBSTANCE: invention may be used for reinforcement of slopes in embankments of motor and rail roads, arrangement of pipelines banking, reinforcement of ditches and other minor drains, and also in construction of other structures in the zone of permanently frozen soils and neighbouring territories, and also in building of temporary roads under complicated conditions (blown sands, watered grounds built with clay or organogenic soils, etc.). Heat insulating layer of building structure that is mainly used in zone of permanently frozen soil contains geotechnical volume grating, in cells of which hydrophilic fibre material is installed. Fibre material in cells is in feebly compacted state with compaction coefficient of 0.7-0.8, and cells of geotechnical volume grating are closed with geotextile fixed with brackets in walls of cells. As fibre material natural material is used, such as peat, or man-made material on the basis of fibre polyethylene such as padding polyester.
EFFECT: provision of building structure functioning in wide range of temperatures changes both in minus and plus intervals, increase of operation life duration.
3 ex, 5 dwg
SUBSTANCE: invention is related to structures of foundation sites beds and may be used for building of main pipelines, for fast erection of roads, airfileds, site objects, reinforcement of coastal line and different slopes. Method of foundation building, in which on prepared soil elastic layer prepared with subsequent growth is installed and fastened, at that elastic layer represents foundation that consists of foundation modules with cellular structure, for this purpose foundation module is laid, inventory anchors are installed in mounting eyes fixed on one side of foundation module, inventory anchors are submerged in soil. In order to form cellular structure of foundation module, propelling force is applied to inventory anchors, which are previously installed in mounting eyes fixed in the opposite side of foundation module, and without removal of propelling force inventory anchors are submerged in soil, cells of foundation module are filled with loose material. Growth of foundation is carried out by means of installation of adjacent foundation modules with pairwise installation of end tops of cellular structures of adjacent foundation modules opposite to each other. Side mounting cavities are covered with provision of cells by aprons fixed in end side surfaces of foundation modules.
EFFECT: increase of bearing capacity of main pipelines, roads and other structures supports, and also increase of operation life and reduction of expenses and time for maintenance of specified industrial sites.
21 cl, 4 dwg
FIELD: constructional engineering.
SUBSTANCE: invention refers to constructional engineering, namely to building of foundation beds and house footings. Method for reinforcing basement soil, includes placing reinforcing elements, layer-by-layer deposition of soil followed by grouting of filling compound, through outflows, to cavity pocket of reinforcing elements. Extensive hoses made of semipermeable polymer fabric or glass fabric are laid on piled soil as reinforcing elements. Hardening or consistent filling solution is grouted to hose cavity pocket until solution penetrates pores of reinforcing element fabric, and basement soil contact area is cemented, or until fabric is ruptured, and cells of circumferential soil are filled. Cement mortar or bentonitic clay solution can be grouted as hardening or consistent solution respectively. Filling solution can be grouted using injector tube mounted in hose cavity pocket. Plane or volume reinforcing cage, metal or synthetic, of strand or bar reinforcement can be placed into hose cavity pocket.
EFFECT: increased durability and reliability of basement soil, decreased dimensional instability of reinforcement.
4 cl, 8 dwg
FIELD: environment protection.
SUBSTANCE: invention is related to environment protection improvement of territories and may be used as erosion-preventive protection of slopes and other objects. Device for erosion-preventive protection of steep slopes includes drop spillways made in the form of walls and arranged at the slope across surface drain. Vertical side of the said walls serves as spillway, the wall being assembled from interconnected gabions oriented along direction of drain. Drop spillways are arranged in their cross section as curvilinear trapezoid, with its concave curvilinear side oriented to the side of supported soil. Wall is assembled from interconnected parabolic gabions. Concave curvilinear side of trapezoid is described with equation of hyperbola where X, Y - abscissa and ordinate of hyperbola, respectively, 0.3≤X≤B; H - height of drop spillway, m; B - width of drop spillway basis, B=(1÷1.5)H.
EFFECT: increase in efficiency, effectiveness and reliability of slopes protection against water erosion and durability of structure service life.
2 cl, 4 dwg
FIELD: construction industry.
SUBSTANCE: invention refers to road construction industry and namely to devices protecting against snow breaks, rock slides, and snow and rock falls. Protecting device of mountain path against snow breaks and rock slides is made on inclined sections of the mountain slope in the form of trays as per the form of ski jumping board. Trays are movable and provided with the possibility of changing angle of slope and installed on inclined sections of the slope on hydraulic jacks connected to hydraulic unit that is remote controlled through communication channel, or as tray bases, there used are natural structures on the mountain slope contour by giving to them the sliding properties owing to ice freezing and by applying antiadhesion coating with low friction coefficient and low adhesion to snow and stone particles.
EFFECT: increase of carrying capacity, decrease of dangerous catastrophic situations and forced movement delays of automobile and railroad transport in mountain path sections.
FIELD: hydraulic structures, particularly to protect downstream objects in mudflow direction against damage by directing mudflow around the object to be protected.
SUBSTANCE: mudflow protective structure comprises upper mud-holding tank arranged at mudflow outlet over objects, which cross mudflow path and defined by protective dam. The structure also has lower accumulation tank and mudflow conduit to permit mudflow passage from mud-holding tank into accumulation one. Longitudinal ridge-like mudflow partitions are arranged inside mud-holding tank. The partitions converge towards mudflow path outlet. Trenches converging in mudflow direction are created between partitions and are arranged on each side of extreme ones. Mudflow conduit is made as excavation system including vertical ones. Each vertical excavation has mudflow inlet orifice provided with grid-like metal structure and located in converged end of corresponding trench. Underground inclined mudflow guiding excavations include main one communicated with lower end of one vertical excavation and arranged under objects to be protected. The main inclined mudflow guiding excavation is opened in slope over accumulation tank. Each of other underground inclined mudflow guiding excavations, namely side ones, is connected to lower end of corresponding vertical excavation. The underground inclined mudflow guiding excavations and communicated with main mudflow excavation and with underground inspection and control one connected with one mudflow excavation and opened in slope surface. All mudflow excavations have inclinations providing transport velocity of solid material entrained by mudflow. Each excavation has at least one safety recess formed in side wall thereof.
EFFECT: possibility of repeated structure usage, increased reliability and efficiency of object to be protection against mudflow.
7 cl, 3 dwg
FIELD: construction, particularly protective device to shield railroad and motor road engineering structures in highlands.
SUBSTANCE: device comprises vertical and horizontal supports and screen composed of separate rigid members. Each member is connected with horizontal support by means of flexible suspension means. The screen is formed of sleepers connected with each other by resilient tie members. Horizontal support is made as fixed girder. Vertical supports are provided with fixed inclines posts. Netting is fastened to the inclined posts.
EFFECT: decreased costs for shielding device construction, increased strength and reliability and improved operational efficiency due to possibility to retain stones of any size.
3 cl, 3 dwg
FIELD: devices affording protection against snowslides, avalanches or falling rocks, particularly to stimulate avalanching at predetermined time.
SUBSTANCE: method involves installing vessel on slope in avalanche hazardous areas before snowfall period; fastening thereof to slope; connecting the vessel with hose and conductor cable; locating hose and cable ends in safe locality. If avalanche hazard occurs the vessel is filled with gaseous explosive mixture via hose laid under snow blanket and the explosive mixture is blasted.
EFFECT: increased reliability, safety and efficiency, reduced costs, increased technological effectiveness and time of avalanching initiation.
2 cl, 2 ex
FIELD: devices affording protection against snowslides, avalanches or falling rocks, namely avalanche preventing structures.
SUBSTANCE: method involves laying perforated hose and electric cable in territory characterized by high avalanche risk on rock surface before snowfall period starting, wherein the hose is adapted to supply explosive gas; leading out hose and electric cable ends into safe zone; supplying gaseous mixture in avalanching territory by pumping thereof under snow blanket from hose through perforated orifices so that gas-saturated zones are created; blasting gaseous mixture with the use of electric cable. Device for above method realization involves flexible hose to be connected to gas source, for instance with gas generator, and provided with perforated orifices punched in hose wall. Device also has electric cable fastened to outer hose surface and comprising electric igniters located in perforated zone of the hose.
EFFECT: increased reliability, safety and efficiency of avalanching initiation, provision of repeated device usage, decreased costs, increased manufacturability and decreased time of works performing.
5 cl, 2 ex, 4 dwg