CN215759070U - Anchor structure of cutting high slope - Google Patents

Abstract

The utility model discloses an anchoring structure for a cut high slope, which comprises a grass planting lattice beam, an anchor cable and an anchor head, wherein one end of the anchor cable extends into a drilling hole of the slope, the other end of the anchor cable penetrates through a through hole of the grass planting lattice beam on the slope and is fixedly connected with the anchor head, the anchor cable comprises a grouting pipe, a plurality of steel strands, a secondary grouting pipe, a plurality of centering circular plate frames and a plurality of hoops, the centering circular plate frames are used for enabling the grouting pipe to be placed in the center in the drilling hole of the slope, and the hoops are wound on the periphery of the plurality of steel strands and are used for bundling the grouting pipe and the steel strands together. The grass planting lattice beam is fixed on the side slope through the anchor cable, so that the grass planting lattice beam is firmer; because the centering circular plate frame is additionally arranged on the anchor cable, the anchor cable can keep centering in a drilled hole, and the secondary grouting pipe is limited; because the periphery of the steel strand is sleeved with the protective sleeve, the protective sleeve has a protective effect on the steel strand, and can ensure that the steel strand is separated from water, so that the steel strand is not easy to rust and oxidize.

Description

Anchor structure of cutting high slope

Technical Field

The utility model relates to the technical field of cutting high slope construction, in particular to an anchoring structure of a cutting high slope.

Background

Excavation of cutting slopes is a great change to stress states of mountains, and if mishandling is carried out, the excavation of cutting slopes is a direct cause of slope instability. Therefore, whether the design of the cutting slope is reasonable is a key for determining the stability of the cutting slope, and the key comprises the steps of determining the slope shape, the slope rate, the slope height, the type of a reinforcing and protecting structure and the like. Therefore, under certain engineering geological conditions, the stability of the cutting slope depends on the designed slope height and whether the reinforcing measures are suitable for the geological conditions. The stability of the slope is mainly controlled by several factors: 1) the line passes through the cutting high slope in a deep excavation mode, and a large relaxation area is easily formed due to large excavation volume and large ground stress adjustment after the slope body is excavated, so that the stability of the slope is reduced; 2) After the side slope is excavated, rock collapse, gully and other slope diseases are easy to be generated along the structural surface under the action of water. 3) The construction method, the construction process and the construction sequence also have great influence on the stability of the cutting slope, so that construction organization is well done on the premise of reasonable design by combining different geological conditions and engineering characteristics, reasonable construction method and process are selected, and organic coordination of excavation and retaining engineering is especially well done. If the side slope with larger stability risk is excavated in a grading way, the side slope is immediately supported and blocked, the side slope is excavated to the first level, the side slope is protected to the first level by the supporting and blocking, and then the side slope is excavated downwards. If reinforcement protection is carried out after excavation is finished, or improper construction methods such as large blasting are adopted, the side slope is unstable and deformed, if the side slope is light, the local collapse is caused, if the side slope is heavy, the engineering landslide is caused, and therefore the engineering cost is increased and the construction progress is influenced.

When the engineering geological condition of the mountain or slope where the side slope is located is poor, a bad slope structure or rock structure exists, a through bad structural surface or a soft interlayer with a long extension degree and a tendency of being empty exists, underground water develops, the influence range is deep, the side slope is high, the possibility of generating integral instability deformation of the slope with large scale, such as landslide, collapse and the like exists, and the range of the deformation often exceeds the range of the side slope. Aiming at the deformation of the slope body, in combination with the design of slope shape and slope rate, retaining or reinforcing measures such as a prestressed anchor cable frame, an anti-skid retaining wall and the like are required to be adopted for strengthening feet and waist, and necessary measures such as drainage, weight reduction and the like are supplemented to ensure the stability of the slope body.

The deformation of the shallow layer of the side slope is an unfavorable structural surface which is poor in engineering geological conditions, high in water content or prone to being empty in the side slope range, the deformation damage can be the deformation of the first-level or several-level side slope, but the damage depth is generally not more than 6-7 m, such as collapse, shallow landslide, partial wedge-shaped body sliding and the like. Aiming at the side slope deformation diseases, the occurrence of the diseases and the further expansion of the deformation scale can be prevented by changing the slope shape and the slope rate or performing common reinforcing and drainage measures such as anchor rod frames, oblique drainage holes and the like. When the slope stability is not controlled by the rock-soil strength, the weathering crack surface and the structural surface, the slope is stable, only the slope is weathered and degraded, washed by water and the like to generate slope deformation, such as stripping, slide collapse, gully and the like, the damage depth is generally in the range of 1-2 m of the surface layer of the slope, and the deformation can be prevented by only taking protective measures (such as a facing wall, a mortar-masonry stone slope protection, grass planting in a framework and the like).

This patent is mainly consolidated to the grass planting gridwork that the surface of cutting slope was laid, then fills in the grass planting gridwork and plants soil, the grass seed of spray-seeding to consolidate the side slope. If the treatment is not good, the grass planting lattice beam can slide under the washing of rainwater, so how to solidify the grass planting lattice beam is the premise of improving the stability of the side slope.

Disclosure of Invention

The utility model aims to provide an anchoring structure of a cutting high slope, which aims to solve one or more technical problems in the prior art and at least provides a beneficial choice or creation condition.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows:

the utility model provides an anchor structure of cutting high slope, includes grass planting gridwork roof beam, anchor rope and anchor head, and in the drilling of side slope was stretched into to the one end of anchor rope, the other end passed on the side slope grass planting gridwork beam's through-hole and anchor head fixed connection, its characterized in that: the anchor rope includes slip casting pipe, many steel strand wires, secondary slip casting pipe, a plurality of disc frame and a plurality of hoop in the middle, be equipped with a centre bore and distribute at a plurality of side openings of centre bore outlying on the disc face of disc frame in the middle, it has at least one spacing circular arc groove to open at disc frame's disc periphery in the middle, the slip casting pipe passes from disc frame's centre bore in the middle, steel strand wires pass from disc frame's side opening in the middle, secondary slip casting pipe is located spacing circular arc groove, a plurality of disc frame and a plurality of hoop in the middle are along slip casting pipe interval distribution, disc frame in the middle is used for making the slip casting pipe place between the middle in the drilling of side slope, hoop winding is in the periphery of many steel strand wires for be in the same place slip casting pipe and steel strand wires.

Furthermore, a protecting sleeve is sleeved on the steel strand.

Furthermore, a steel sleeve is arranged in the through hole of the grass planting grid beam, and the anchor cable penetrates through the steel sleeve.

And further, the straw planting lattice beam fixing device further comprises an anchor rod, one end of the anchor rod extends into an anchor hole of the side slope, the anchor rod is fixed in the anchor hole by grouting into the anchor hole, and the other end of the anchor rod is fixedly connected with the straw planting lattice beam.

Furthermore, a plurality of limiting steel bar groups are distributed on the surface of the anchor rod.

Further, spacing reinforcing bar group includes 3 spacing reinforcing bars, and 3 spacing reinforcing bars are radial distribution along the circumferencial direction of stock.

Furthermore, the limiting steel bar is of a trapezoidal groove structure bent on a section of steel bar.

Furthermore, the cross-sectional dimension of the grass planting lattice beam is 30cm by 30cm, and C25 is adopted for pouring.

Further, the protection sleeve is made of PVC pipes.

Further, the steel strand adopts a phi 15.2mm steel strand with fpk =1860 MPa.

The utility model has the beneficial effects that:

the grass planting lattice beam is fixed on the side slope through the anchor cable, so that the grass planting lattice beam is firmer; because the centering circular plate frame is additionally arranged on the anchor cable, the anchor cable can keep centering in a drilled hole, and the secondary grouting pipe is limited; because the periphery of the steel strand is sleeved with the protective sleeve, the protective sleeve has a protective effect on the steel strand, and can ensure that the steel strand is separated from water, so that the steel strand is not easy to rust and oxidize.

The grass planting lattice beam is reinforced through the anchor rods, so that the grass planting lattice beam can better withstand the erosion of rainwater, and the occurrence of landslide is avoided; because be equipped with spacing reinforcing bar group on the stock, not only make the stock can keep effect placed in the middle in the anchor eye, moreover after the slip casting is fixed, spacing reinforcing bar group can increase the resistance of stock, can prevent effectively that the stock from breaking away from the anchor eye.

Drawings

The utility model is further described with the aid of the accompanying drawings, in which the embodiments do not constitute any limitation, and for a person skilled in the art, without inventive effort, further drawings may be obtained from the following figures:

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the cable bolt shown in fig. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is a schematic structural view of the centered circular plate rack shown in FIG. 4;

FIG. 6 is a schematic view of the anchor rod of FIG. 1;

FIG. 7 is a side view of FIG. 6;

fig. 8 is a schematic structural view of the limiting reinforcement bar shown in fig. 7.

In the figure: 1. planting grass grids; 2. an anchor head; 3. an anchor cable; 4. an anchor rod; 5. Side slope; 6. drilling; 7. an anchor eye; 8. a grouting pipe; 9. steel strand wires; 10. a secondary grouting pipe; 11. a central circular plate frame; 12. a hoop; 13. a central bore; 14. a side hole; 15. a limiting arc groove; 16. a protective sleeve; 17. steel casing; 18. limiting the steel bar group; 19. and limiting the reinforcing steel bars.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and specific embodiments, and it is to be noted that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "forward", "reverse", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

As shown in fig. 1, an anchoring structure for a cutting high slope includes a grass planting lattice beam 1, an anchor cable 3, an anchor head 2 and an anchor rod 4, wherein one end of the anchor cable 3 extends into a drilling hole 6 of a slope 5, the drilling hole 6 is filled with slurry, the anchor cable is fixed, the other end of the anchor cable passes through a through hole of the grass planting lattice beam 1 on the slope and is fixedly connected with the anchor head 2, one end of the anchor rod 4 extends into an anchor hole 7 of the slope 5, the anchor rod 4 is fixed in the anchor hole 7 by filling slurry into the anchor hole 7, the other end of the anchor rod 4 is fixedly connected with the grass planting lattice beam 1, the cross-sectional dimension of the grass planting lattice beam is 30cm and 30cm, and C25 is adopted for pouring.

The notes in grouting: 1. the grouting material is ordinary portland cement. Before grouting, a good mixing ratio test is carried out according to the design strength requirement. 2. After drilling, high-pressure air (wind pressure of 0.2-0.4 MPa) is used for completely removing rock powder and accumulated water in the hole. 3. M30 cement mortar is poured into the anchor holes of the anchor rods and the anchor cables, and an early strength agent can be properly added when necessary. And 4, grouting the anchor rod by adopting one-time grouting, namely grouting by a hole bottom grout returning method, wherein the grouting pressure is 0.6-1.0 MPa, slowly drawing out the grouting pipe from the hole bottom in the grouting process, and stopping grouting when the hole opening emits grout for more than 10 seconds. 5. The anchor cable grouting process, the primary grouting method and the pressure are the same as those of anchor rod grouting. And (4) observing the back-falling condition of the slurry after the grouting is finished, and timely supplementing the slurry if the back-falling condition exists. And grouting records are made in the grouting operation process. 6. For an anchor cable: and (4) when the stratum is soft, secondary high-pressure splitting grouting is adopted to improve the pulling resistance of the anchoring section. And secondary grouting is carried out 4-5 hours after primary grouting is finished, and the water-cement ratio is 0.45-0.5.

The grouting pressure is not less than 1.5-2.0 MPa.

As shown in fig. 2, 3, 4 and 5, the anchor cable 3 includes a grouting pipe 8, a plurality of steel strands 9, a secondary grouting pipe 10, a plurality of centering circular plate frames 11 and a plurality of hoops 12, the circular plate surface of the centering circular plate frame 11 is provided with a central hole 13 and a plurality of side holes 14 distributed on the periphery of the central hole 13, at least one limiting circular arc groove 15 is opened on the periphery of the circular plate of the centering circular plate frame 11, the grouting pipe 8 passes through the central hole 13 of the centering circular plate frame 11, the steel strands 9 pass through the side holes 14 of the centering circular plate frame 11, the secondary grouting pipe 10 is located in the limiting circular arc groove 15, the plurality of centering circular plate frames 11 and the plurality of hoops 12 are distributed at intervals along the grouting pipe 10, the centering circular plate frames 11 are used for centering the grouting pipe 8 in the drill hole 6 of the slope, and the hoops 12 are wound on the periphery of the plurality of steel strands 9 for bundling the grouting pipe 8 and the steel strands 9 together. The through hole of the grass planting grid beam 1 is provided with a steel sleeve 17, and the anchor cable 3 penetrates through the steel sleeve 17.

The steel strand is a steel strand with the diameter phi of 15.2mm and the fpk =1860MPa, the steel strand 9 is sleeved with a protective sleeve 16, and the protective sleeve 16 is made of PVC (polyvinyl chloride) pipes.

Specifically, the anchor cable 3 is divided into a fixed section and a free section, and the centering circular plate frame 11 is distributed on the fixed section of the anchor cable 3 to play a role in limiting and fixing the anchor cable. The protecting sleeve 16 is sleeved on the steel strand of the free section of the anchor cable 3, and plays a role in rust prevention for the steel strand. The end of the PVC pipe is wrapped by adhesive tape, the PVC pipe is a wear-resistant rubber pipe or a high-strength PVC pipe, and a small brittle plastic corrugated pipe is forbidden. After the free section steel strand is coated with the grease, the free section steel strand is wrapped by the wear-resistant adhesive tape, so that the slurry is prevented from permeating into the pipe in the grouting process.

As shown in fig. 6 and 7, a plurality of limiting steel bar groups 18 are distributed on the surface of the anchor rod 4, each limiting steel bar group 18 includes 3 limiting steel bars 19, and the 3 limiting steel bars 19 are radially distributed along the circumferential direction of the anchor rod 4.

As shown in fig. 8, the limiting reinforcement 19 is a trapezoidal groove structure bent on a section of reinforcement.

Notes on the manufacture of the anchor cable 3:

1. the anchor cable material is selected from a high-strength low-relaxation prestressed common steel strand with phi of 15.2mm and fpk =1860MPa, and the mechanical property of the anchor cable material must meet the regulation of the existing national standard 'prestressed concrete steel strand' (GB/T5224). The anchorage must meet the current industry standard, anchor, clamp and connector application specification for prestressed tendons, JGJ 85.

2. The anchor cable is bound to ensure that each bundle of steel strands is uniformly arranged, straight, untwisted and not forked, and needs to be removed with embroidery and oil stain, and dead bends, mechanical damage and rust pits are removed.

3. The anchor cable also comprises an expansion ring, the expansion ring is an engineering plastic ring produced in a factory, and the number of the steel stranded wires of the anchor cable body is designed to be matched with the number of the holes of the expansion ring when the anchor cable is purchased. The hoop can be made of sheet iron or iron tie wire according to local conditions.

4. And (3) reserving the length of the steel strand wire to be 1.5m in the anchor cable manufacturing process so as to be convenient for tensioning and locking, cutting off redundant steel strand wires after the tensioning work is completely finished, and pouring an anchor head by adopting C30 concrete.

Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. The utility model provides an anchor structure of cutting high slope, includes grass planting gridwork roof beam, anchor rope and anchor head, and in the drilling of side slope was stretched into to the one end of anchor rope, the other end passed on the side slope grass planting gridwork beam's through-hole and anchor head fixed connection, its characterized in that: the anchor rope includes slip casting pipe, many steel strand wires, secondary slip casting pipe, a plurality of disc frame and a plurality of hoop in the middle, be equipped with a centre bore and distribute at a plurality of side openings of centre bore outlying on the disc face of disc frame in the middle, it has at least one spacing circular arc groove to open at disc frame's disc periphery in the middle, the slip casting pipe passes from disc frame's centre bore in the middle, steel strand wires pass from disc frame's side opening in the middle, secondary slip casting pipe is located spacing circular arc groove, a plurality of disc frame and a plurality of hoop in the middle are along slip casting pipe interval distribution, disc frame in the middle is used for making the slip casting pipe place between the middle in the drilling of side slope, hoop winding is in the periphery of many steel strand wires for be in the same place slip casting pipe and steel strand wires.

2. The anchoring structure of a cutting high slope according to claim 1, characterized in that: the steel strand is sleeved with a protective sleeve.

3. The cutting high slope anchoring structure according to claim 2, characterized in that: and a steel sleeve is arranged in the through hole of the grass planting lattice beam, and the anchor cable penetrates through the steel sleeve.

4. The cutting high slope anchoring structure according to claim 3, wherein: the anchor rod is characterized by further comprising an anchor rod, one end of the anchor rod extends into an anchor hole of the side slope, the anchor rod is fixed in the anchor hole through grouting into the anchor hole, and the other end of the anchor rod is fixedly connected with the grass planting lattice beam.

5. The anchoring structure of a cutting high slope according to claim 1, characterized in that: a plurality of limiting steel bar groups are distributed on the surface of the anchor rod.

6. The cutting high slope anchoring structure according to claim 5, wherein: spacing reinforcing bar group includes 3 spacing reinforcing bars, and 3 spacing reinforcing bars are radial distribution along the circumferencial direction of stock.

7. The anchoring structure of a cutting high slope according to claim 1, characterized in that: the limiting steel bar is of a trapezoidal groove structure bent on a section of steel bar.

8. The anchoring structure of a cutting high slope according to claim 1, characterized in that: the cross-sectional dimension of the grass planting lattice beam is 30cm by 30cm, and the grass planting lattice beam is poured by C25.

9. The anchoring structure of a cutting high slope according to claim 1, characterized in that: the protective sleeve is made of PVC pipes.

10. The anchoring structure of a cutting high slope according to claim 1, characterized in that: the steel strand adopts phi 15.2mm and fpk =1860 MPa.

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