CN219793951U - Combined foundation pit side slope supporting structure - Google Patents
Combined foundation pit side slope supporting structure Download PDFInfo
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- CN219793951U CN219793951U CN202321257130.4U CN202321257130U CN219793951U CN 219793951 U CN219793951 U CN 219793951U CN 202321257130 U CN202321257130 U CN 202321257130U CN 219793951 U CN219793951 U CN 219793951U
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- foundation pit
- retaining wall
- side slope
- anchor
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- 230000008093 supporting effect Effects 0.000 title claims description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 238000005507 spraying Methods 0.000 claims abstract description 30
- 238000010276 construction Methods 0.000 claims abstract description 22
- 239000002131 composite material Substances 0.000 claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 239000002352 surface water Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000005442 atmospheric precipitation Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to the technical field of side slope support, in particular to a composite foundation pit side slope support structure, which comprises a steel pipe pile layer, an anchor spraying layer and a retaining wall layer which are arranged on the inner wall of a foundation pit layer by layer from outside to inside, wherein a waist beam is arranged on the surface of the retaining wall layer, anchor ropes are fixed on the waist beam, and the anchor ropes penetrate into soil on the outer side of the foundation pit to apply precompression to the steel pipe pile layer, the anchor spraying layer and the retaining wall layer. The utility model solves the problems of large engineering quantity and long construction period of the traditional support structure, adopts a composite structure on the premise of ensuring the support strength, and has smaller engineering quantity and shorter construction period.
Description
Technical Field
The utility model relates to the technical field of side slope support, in particular to a composite foundation pit side slope support structure.
Background
The foundation pit side slope support is an important point of foundation pit construction, and the support form of the foundation pit side slope support is determined according to the safety grade of the side slope during the side slope construction. The safety level of slope construction needs to comprehensively consider factors such as surrounding environment, slope stability, slope support height, stratum conditions and the like.
In the prior art, the structure form commonly adopted for the slope to be constructed with higher requirements on the safety level and the deformation of the supporting structure is a retaining wall anchor spraying concrete structure or a retaining wall anchor rod combined supporting structure. The retaining wall construction needs a large amount of steel bars and concrete, and the construction period is long and the engineering quantity is large, so that the construction progress is not facilitated.
Disclosure of Invention
In order to solve the problems, the utility model provides a composite foundation pit side slope support structure, which solves the problems of large engineering quantity and long construction period of the traditional side slope support structure.
The technical scheme adopted by the utility model is as follows:
a composite foundation pit side slope supporting structure comprises a steel pipe pile layer, an anchor spraying layer and a retaining wall layer, wherein the steel pipe pile layer, the anchor spraying layer and the retaining wall layer are arranged at the inner wall of a foundation pit and are arranged in the foundation pit layer by layer; the steel pipe pile layer comprises a plurality of steel pipe piles; the anchor spraying layer is provided with a reinforcing mesh; the surface of the reinforcing mesh is covered with concrete; the retaining wall layer is of a thin-wall structure; the retaining wall layer surface is equipped with the waist rail, the one end that the waist rail was fixed with the anchor rope, the other end of anchor rope passes anchor spraying layer and steel-pipe pile layer are fixed in the foundation ditch outside soil body.
Further, spaces are formed between adjacent steel pipe piles, and the horizontal distances of the spaces are equal.
Further, the anchor cables are arranged in a matrix, and the anchor cables pass through the space.
Further, 3 steel pipe piles are arranged between the adjacent anchor ropes along the horizontal direction.
Further, a water retaining wall is arranged above the retaining wall layer; the section of the water retaining wall is L-shaped, so that the water retaining wall is provided with a vertical water retaining section and a horizontal water collecting section; a guardrail is arranged above the water retaining section; the lower surface of the water collecting section covers the tops of the anchor spraying layer and the steel pipe pile layer, and the upper surface is level with the bottom of the side slope;
further, a drain hole is formed in the joint of the water retaining section and the water collecting section, and the drain hole penetrates through the water retaining section;
the surface of the retaining wall layer and the surface of the water retaining section are provided with a drain pipe, and the top of the drain pipe is connected with the drain hole;
further, a water drain hole is formed in the soil body on the outer side of the foundation pit, and the water drain hole is communicated to the drain pipe.
Further, the retaining wall layer extends to the soil body below the foundation pit, and a bottom beam is arranged at the bottom of the retaining wall layer; the thickness of the bottom beam is larger than that of the retaining wall layer.
Due to the adoption of the technical scheme, the principle of the utility model is as follows:
the utility model replaces the traditional retaining wall with the multi-layer supporting structure to realize the retaining effect. Specifically, the steel pipe pile layer is used as a first layer supporting structure, and is arranged at the foundation pit wall to serve as a base layer of the supporting structure; the anchor spraying layer is used as a second layer of supporting structure, and is arranged on the inner side of the steel pipe pile layer, and the anchor spraying layer consists of a reinforcing mesh and concrete, has the functions of water blocking and supporting, and can effectively prevent the outer side of the foundation pit from penetrating into the foundation pit; the retaining wall is used as a third layer supporting structure and is arranged inside the anchor spraying layer, so that the water retaining and supporting effects are further improved. On the basis of the three-layer supporting structure, the three-layer supporting structure is reinforced in a mode of applying prestress through the anchor cable, so that the integrity of the supporting structure is enhanced, and the supporting strength is improved.
In order to facilitate the drainage of the side slope, the water retaining wall is arranged above the retaining wall, the water retaining wall is provided with the water retaining section and the water collecting section, surface water of the side slope is converged at the water collecting section and cannot pour into the foundation pit under the blocking of the water retaining wall, and only can flow into the drain pipe through the drain hole and finally flow into the foundation pit. The drain pipe is also communicated with one end of the water discharge hole, and the other end of the water discharge hole extends into the soil body on the outer wall of the foundation pit and is used for collecting capillary water so as to avoid overlarge humidity of the soil body.
The beneficial effects of the utility model are as follows:
the utility model replaces the traditional supporting structure by the three-layer supporting structure and the anchor rope reinforcing structure, has less consumption of steel bars and concrete and less construction work amount, and is beneficial to accelerating the construction period and advancing the construction progress. The anchor spraying layer and the retaining wall layer in the supporting structure have the water retaining function, and can prevent the water seepage of the foundation pit; meanwhile, the drain hole and the water retaining wall can drain capillary water and surface water in the soil body; the soil humidity can be effectively reduced, and the supporting effect is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic cross-sectional view of a composite foundation pit side slope support structure provided by the utility model;
fig. 2 is a schematic view of a layer elevation structure of the steel pipe pile;
FIG. 3 is a schematic view of the vertical surface structure of the anchor spraying layer;
FIG. 4 is a schematic view of the retaining wall layer;
in the accompanying drawings:
1. a steel pipe pile layer; 11. a steel pipe pile; 2. an anchor spraying layer; 21. a reinforcing mesh; 22. concrete; 3. a retaining wall layer; 31. a bottom beam; 4. waist beam; 5. an anchor cable; 6. a water retaining wall; 61. a water retaining section; 62. a water collecting section; 63. guard bars; 64. a drain hole; 7. a drain pipe; 8. and a water discharge hole.
Detailed Description
As shown in fig. 1 to 3, a composite foundation pit side slope supporting structure comprises a steel pipe pile layer 1, an anchor spraying layer 2 and a retaining wall layer 3, wherein the steel pipe pile layer 1, the anchor spraying layer 2 and the retaining wall layer 3 are positioned at the inner wall of a foundation pit and are arranged into the foundation pit layer by layer; the steel pipe pile layer 1 comprises a plurality of steel pipe piles; the anchor spraying layer 2 is provided with a reinforcing mesh 21; the surface of the reinforcing mesh 21 is covered with concrete 22; the retaining wall layer 3 is of a thin-wall structure; the retaining wall layer 3 surface is equipped with waist rail 4, waist rail 4 is fixed with the one end of anchor rope 5, the other end of anchor rope 5 passes anchor spraying layer 2 and steel-pipe pile layer 1 are fixed in the foundation ditch outside soil body.
When the retaining wall is adopted for slope support construction, a large amount of steel bars and concrete 22 are required to be consumed, the engineering amount is large, the construction period is long, and the retaining wall adopts a multi-layer support structure to replace the traditional retaining wall, so that the retaining effect is realized. The steel pipe pile layer 1 is used as a first layer supporting structure and is arranged at the foundation pit wall to be used as a foundation layer of the supporting structure; the anchor spraying layer 2 is used as a second layer supporting structure, the second layer supporting structure is arranged on the inner side of the steel pipe pile layer 1, the anchor spraying layer 2 consists of a reinforcing steel bar mesh 21 and concrete 22, has water retaining and supporting functions, and can effectively prevent the outer side of the foundation pit from penetrating into the foundation pit; the retaining wall is used as a third layer supporting structure and is arranged inside the anchor spraying layer 2, so that the water retaining and supporting effects are further improved. On the basis of the three-layer supporting structure, the three-layer supporting structure is reinforced in a mode of applying prestress through the anchor cable 5, so that the integrity of the supporting structure is enhanced, and the supporting strength is improved.
As a preferred embodiment of the present utility model, the steel pipe piles 11 are disposed at equal intervals so as to reduce the amount of work while ensuring the strength of the support. An anchor spraying layer 2 is arranged in the steel pipe pile layer 1 to strengthen support and provide water blocking functions. Waist beam 4 is arranged between the steel pipe piles 11 to strengthen the connection between the single steel pipe piles, the integrity of the steel pipe pile layer 1 is improved, and the supporting strength is further improved. The waist beam 4 is arranged to provide an acting point for the anchor head of the anchor cable 5 and strengthen the anchoring effect of the anchor cable 5. The anchor cable 5 passes through the gap between the steel pipe piles and then is anchored in the soil body outside the foundation pit. And pouring a retaining wall on the plane of the waist beam 4, covering the waist beam 4 by the retaining wall, and continuing to extend a certain thickness into the foundation pit.
In one embodiment, as shown in fig. 1 and 2, the diameter of the steel pipe pile 11 is 200mm, the distance between the centers of adjacent steel pipe piles 11 is 0.5m, and the steel pipe piles are filled with pure cement slurry. The anchor cables 5 are arranged at intervals among the steel pipe piles 11, the distance between the anchor cables 5 is 1.5m, the anchor cables 5 are arranged in a matrix, and 3 anchor cables 5 are arranged along the height direction.
In one embodiment, as shown in fig. 1 and 3, the anchor spraying layer 2 is formed by solidifying a reinforcing mesh 21 and fine sand concrete 22, wherein the reinforcing mesh 21 has a square lattice with a specification of 200mm, and the fine sand concrete 22 has a thickness of 100mm. The anchor spraying layer 2 covers the surface of the steel pipe pile layer 1.
As a preferred embodiment of the present utility model, a water blocking wall 6 is provided above the blocking wall layer 3, and a guard rail 63 is provided above the water blocking wall 6. The retaining wall 6 is connected with the retaining wall layer 3 and the bottom of the side slope and covers the anchor spraying layer 2 and the steel pipe pile layer 1 so as to ensure that surface water from the side slope cannot permeate into the supporting structure.
In one embodiment, as shown in fig. 1 and 4, the retaining wall layer 3 is a thin-wall retaining wall, which has a smaller thickness than a conventional retaining wall and a smaller construction work amount. The bottom of the retaining wall layer 3 is provided with a bottom beam 31 at the part below the bottom surface of the foundation pit, and the section width of the bottom beam 31 is larger than the width of the exposed bottom surface part so as to improve the supporting effect of the retaining wall. The retaining wall 3 top sets up the retaining wall 6, and the retaining wall 6 divide into vertical manger plate section 61 and horizontal catchment section 62, and manger plate section 61 and catchment section 62 make up into L type section. The junction of the water collecting section 62 and the side slope is covered by a clay for caulking so that atmospheric precipitation can enter the water collecting section 62. The lower edge of the water retaining section 61 is provided with a drain hole 64, and the upper surface of the water collecting section 62 is provided with a slope surface which inclines towards the drain hole 64, and the slope is 5%. The drain hole 64 penetrates the water blocking section 61 and is connected with the drain pipe 7 outside the retaining wall layer 3. The height direction of the drain pipe 7 is provided with a plurality of drain holes 8, and the drain holes 8 are preferentially arranged at the positions of the broken belt and the bedrock cracks and penetrate through the supporting structure to be connected with the drain pipe 7 so as to disperse capillary water in the soil body. To enhance the protection, a fence 63 is also provided on the upper edge of the water-retaining wall 6.
The above is only a preferred example of the present utility model, and any person skilled in the art may modify the present utility model or make modifications to the same by using the technical solutions described above. Therefore, any simple modification or equivalent made according to the technical solution of the present utility model falls within the scope of the protection claimed by the present utility model.
Claims (8)
1. The composite foundation pit side slope supporting structure is characterized by comprising a steel pipe pile layer, an anchor spraying layer and a retaining wall layer, wherein the steel pipe pile layer, the anchor spraying layer and the retaining wall layer are positioned at the inner wall of a foundation pit and are arranged into the foundation pit layer by layer;
the steel pipe pile layer comprises a plurality of steel pipe piles;
the anchor spraying layer is provided with a reinforcing mesh; the surface of the reinforcing mesh is covered with concrete;
the retaining wall layer is of a thin-wall structure;
the retaining wall layer surface is equipped with the waist rail, the one end that the waist rail was fixed with the anchor rope, the other end of anchor rope passes anchor spraying layer and steel-pipe pile layer are fixed in the soil body outside the foundation ditch.
2. A composite foundation pit side slope supporting construction according to claim 1, wherein,
and a space is arranged between the adjacent steel pipe piles, and the horizontal distances of the spaces are equal.
3. A composite foundation pit side slope supporting construction according to claim 2, wherein,
the anchor cables are arranged in a matrix mode, and the anchor cables penetrate through the intervals.
4. A composite foundation pit side slope supporting construction according to claim 3, wherein,
and 3 steel pipe piles are arranged between the adjacent anchor cables along the horizontal direction.
5. A composite foundation pit side slope supporting construction according to claim 1, wherein,
a water retaining wall is arranged above the retaining wall layer; the section of the water retaining wall is L-shaped, so that the water retaining wall is provided with a vertical water retaining section and a horizontal water collecting section; a guardrail is arranged above the water retaining section; the lower surface of the water collecting section covers the tops of the anchor spraying layer and the steel pipe pile layer, and the upper surface is flush with the bottom of the side slope.
6. A composite foundation pit side slope supporting construction according to claim 5, wherein,
a drain hole is formed at the joint of the water retaining section and the water collecting section, and penetrates through the water retaining section;
the retaining wall layer with manger plate section surface is equipped with the drain pipe, the drain pipe top with the wash port links to each other.
7. A composite foundation pit side slope supporting construction according to claim 6, wherein,
and the soil body at the outer side of the foundation pit is provided with a water drain hole, and the water drain hole is communicated to the drain pipe.
8. A composite foundation pit side slope supporting construction according to claim 1, wherein,
the retaining wall layer extends into the soil body below the foundation pit, and a bottom beam is arranged at the bottom of the retaining wall layer; the thickness of the bottom beam is larger than that of the retaining wall layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321257130.4U CN219793951U (en) | 2023-05-23 | 2023-05-23 | Combined foundation pit side slope supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321257130.4U CN219793951U (en) | 2023-05-23 | 2023-05-23 | Combined foundation pit side slope supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219793951U true CN219793951U (en) | 2023-10-03 |
Family
ID=88181001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321257130.4U Active CN219793951U (en) | 2023-05-23 | 2023-05-23 | Combined foundation pit side slope supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219793951U (en) |
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2023
- 2023-05-23 CN CN202321257130.4U patent/CN219793951U/en active Active
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