CN220266571U - Foundation pit combined supporting structure under complex environment - Google Patents
Foundation pit combined supporting structure under complex environment Download PDFInfo
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- CN220266571U CN220266571U CN202321709654.2U CN202321709654U CN220266571U CN 220266571 U CN220266571 U CN 220266571U CN 202321709654 U CN202321709654 U CN 202321709654U CN 220266571 U CN220266571 U CN 220266571U
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- foundation pit
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- pile supporting
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- 239000002689 soil Substances 0.000 claims abstract description 57
- 230000004888 barrier function Effects 0.000 claims abstract description 16
- 238000009412 basement excavation Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000013459 approach Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of rock-soil foundation pits, and particularly relates to a foundation pit combined supporting structure in a complex environment, which comprises a combined supporting structure formed by a cast-in-place pile supporting structure and a soil nailing wall supporting structure, wherein the cast-in-place pile supporting structure is arranged on one side of a foundation pit close to an obstacle; the soil nailing wall supporting structure close to one side of the barrier is arranged on the slope side wall of the foundation pit in a disturbance forbidden area above the underpass structure; the bored concrete pile supporting structure who approaches barrier one side is close to soil nail wall supporting structure both sides setting, and bored concrete pile supporting structure includes along the foundation ditch first bored concrete pile supporting structure that the barrier one side sideline set up, the second bored concrete pile supporting structure that regional setting between first bored concrete pile supporting structure and soil nail wall supporting structure domatic, and first bored concrete pile supporting structure is perpendicular with the direction of arranging of second bored concrete pile supporting structure. The beneficial effects of the utility model are as follows: solves the problem of foundation pit support when the building is penetrated and the barrier is close to the building.
Description
Technical Field
The utility model belongs to the technical field of rock-soil foundation pits, and particularly relates to a foundation pit combined supporting structure in a complex environment.
Background
The foundation pit is a soil pit excavated at a position designed by a foundation according to the elevation of the foundation and the plane size of the foundation. In order to ensure the safety of underground structure construction and the surrounding environment of the foundation pit, foundation pit construction close to a building often needs to be provided with a foundation pit supporting structure, and supporting, reinforcing and protecting measures are adopted for the side wall of the foundation pit and the surrounding environment so as to ensure the stability of soil around the foundation pit and protect adverse effects on the nearby building in the process of excavation of the foundation pit. However, the support forms such as a conventional single bored pile support structure, a steel sheet pile support structure and the like are difficult to meet the requirements for the structures below the foundation pit and the areas with higher requirements for soil disturbance above the structures.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a foundation pit combined supporting structure in a complex environment, which solves the problem of foundation pit supporting when a structure is worn under the same time and is close to an obstacle.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a foundation pit combined supporting structure in a complex environment comprises a combined supporting structure formed by a cast-in-place pile supporting structure and a soil nailing wall supporting structure, wherein the cast-in-place pile supporting structure is arranged on one side of a foundation pit close to an obstacle; the soil nailing wall supporting structure adjacent to one side of the barrier is arranged on a disturbance prohibiting area above the underpass structure and the slope side wall of the foundation pit; the cast-in-place pile supporting structure adjacent to one side of the obstacle is arranged close to two sides of the soil nailing wall supporting structure, the cast-in-place pile supporting structure comprises a first cast-in-place pile supporting structure arranged along a side line of the foundation pit adjacent to one side of the obstacle and a second cast-in-place pile supporting structure arranged in an area between the first cast-in-place pile supporting structure and the slope of the soil nailing wall supporting structure, the arrangement direction of the first cast-in-place pile supporting structure is vertical to the arrangement direction of the second cast-in-place pile supporting structure, and the arrangement direction of the second cast-in-place pile supporting structure is vertical to the side line of the foundation pit adjacent to one side of the obstacle; soil nail holes are formed in the side wall, close to one side of the barrier, of the foundation pit, the soil nail wall supporting structure adopts a plurality of ribbed steel bars as soil nails, and cement paste is poured into the soil nail holes to strengthen soil around the foundation pit; the arrangement quantity of the soil nails is calculated and determined by the geological conditions around the foundation pit.
The foundation pit is characterized by further comprising supporting structures arranged on other three side walls of the foundation pit, and the supporting structures arranged on other three side walls of the foundation pit reasonably select supporting structure forms according to whether barriers exist on the periphery.
The supporting structural forms of other three side wall arrangements of the foundation pit comprise at least one of soil nailing wall supporting, filling pile supporting and slope laying excavation supporting.
The first bored concrete pile support is in the setting of "line" shape in soil nail wall supporting structure both sides, and first bored concrete pile supporting structure is L shape with second bored concrete pile supporting structure and arranges.
And a third bored concrete pile supporting structure is arranged at a corner of the side wall of the foundation pit adjacent to one side of the barrier, and is perpendicular to the first bored concrete pile supporting structure, so that the influence of foundation pit excavation construction on the adjacent barrier is reduced to the minimum.
And the distance between the cast-in-situ pile supporting structure and the contour line of the disturbance-forbidden structure below the foundation pit is not less than 3m.
The slope of the soil nailing wall slope adjacent to one side of the obstacle is preferably not slower than 1:0.5 so as to reduce earth excavation and influence on the obstacle as much as possible.
The barrier is a railway, and the underpass structure is an underpass subway.
And the filling pile of the filling pile supporting structure is buried at the lower part of the foundation pit to the designed depth.
The beneficial effects of the utility model are as follows: and the combined support structure of the cast-in-place pile and the soil nailing wall and the support structure of the other three sides of the foundation pit are arranged at one side close to the barrier, so that the stability of the soil body around the foundation pit is effectively ensured. The first bored concrete pile supporting structure and the second bored concrete pile supporting structure can form effective supporting for the area adjacent to one side of the obstacle, and the influence of foundation pit excavation construction on the adjacent obstacle can be reduced to the minimum by the arrangement of the third bored concrete pile supporting structure. The utility model solves the problem of foundation pit support which simultaneously exists under the structure and is close to the obstacle.
Drawings
FIG. 1 is an overall three-dimensional view of a foundation pit composite support structure of the present utility model;
FIG. 2 is a side elevation view of a combined support of a side slope cast-in-place pile and a soil nailing wall on one side of a foundation pit adjacent to an obstacle;
fig. 3 is a top view of a combined support of a foundation pit side slope cast-in-place pile and a soil nailing wall close to an obstacle.
In the figure: 1. a soil nailing wall supporting structure; 2. a cast-in-place pile supporting structure; 2-1, a first bored pile supporting structure; 2-2, a second filling pile supporting structure; 2-3, a third filling pile supporting structure; 3. slope laying and excavation supporting; 4. soil nails; 5. soil nailing wall slope; 6. a subway; 7. railway.
Detailed Description
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two parts. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In this embodiment, the foundation pit combined supporting structure of the present utility model will be described with respect to the case where the obstacle is a railway and the subway is located below the foundation pit.
As shown in fig. 1 to 3, the foundation pit combined supporting structure in the complex environment of the present embodiment includes a combined supporting structure formed by a cast-in-place pile supporting structure 2 and a soil nailing wall supporting structure 11 arranged on one side close to a railway 7, the supporting structure arranged on the other three side walls of the foundation pit reasonably selects a supporting structure form according to whether barriers exist on the periphery, in the present embodiment, the other three sides of the foundation pit have no interference barriers to select a slope-releasing excavation supporting 3 form, and the slope of the slope-releasing excavation supporting 3 is determined according to the soil conditions around the foundation pit.
The soil nail wall supporting structure 11 close to one side of the railway 7 is arranged in a disturbance-forbidden area above the underpass subway 6 and on the slope side wall of the foundation pit, soil nail 4 holes are formed in the side wall of the foundation pit close to one side of the obstacle, the soil nail 4 wall adopts a plurality of ribbed steel bars as soil nails 4, and cement slurry is poured into the soil nail 4 holes to strengthen soil around the foundation pit; the arrangement quantity of the soil nails 4 is calculated and determined by the geological condition around the foundation pit. The gradient of the soil nailing wall slope 5 adjacent to one side of the obstacle is preferably not slower than 1:0.5 so as to reduce the earth excavation and reduce the influence on the obstacle as much as possible.
The cast-in-place pile supporting structure 2 close to one side of the railway 7 is arranged on two sides of the soil nailing wall supporting structure 11, a plurality of cast-in-place piles of the cast-in-place pile supporting structure 2 are vertically arranged and are buried in the lower portion of the foundation pit to the designed depth, and the cast-in-place pile supporting structure comprises a first cast-in-place pile supporting structure 2-1, a second cast-in-place pile supporting structure 2-2 and a third cast-in-place pile supporting structure 2-3. Wherein, the first bored concrete pile supporting structure 2-1 is close to both sides of the soil nailing wall supporting structure 11, and is arranged in a straight line along the foundation pit side line close to one side of the obstacle. The second bored concrete pile supporting structure 2-2 is arranged in the area between the first bored concrete pile and the slope of the soil nailing wall supporting structure 11, and is perpendicular to the direction of the foundation pit side line adjacent to one side of the obstacle, so as to form effective support for the area. The distance between the second bored concrete pile supporting structure 2-2 and the outline of the subway 6 below the foundation pit is not less than 3m, and the arrangement direction of the first bored concrete pile supporting structure 2-1 and the second bored concrete pile supporting structure 2-2 is vertical, and is preferably L-shaped. The third bored concrete pile supporting structure 2-3 is arranged at the corner of the side, close to the railway 7, of the foundation pit, is perpendicular to the first bored concrete pile supporting structure 2-1 and is distributed in an L shape, so that the influence of foundation pit excavation construction on the side, close to the railway 7, is reduced to the minimum.
Embodiments of the present utility model are as follows:
(1) Constructing a permanent pile foundation;
(2) The construction of the cast-in-place pile supporting structure 2 close to one side of the railway 7 and the corners of the foundation pit comprises the construction of a first cast-in-place pile supporting structure 2-1, a second cast-in-place pile supporting structure 2-2 and a third cast-in-place pile supporting structure 2-3; detecting the specific position of the subway 6 below the foundation pit, and marking the outline of the subway 6 on the bottom surface of the foundation pit; the distance between the second bored pile supporting structure 2-2 and the contour line of the subway 6 is required to be not less than 3 meters;
(3) Excavating a foundation pit, and installing a soil nailing wall supporting structure 11 along with excavation;
(4) And (3) carrying out deformation monitoring on the combined supporting structure in the foundation pit excavation process until the foundation pit excavation is completed.
The foregoing detailed description of the embodiments of the utility model has been presented only to illustrate the preferred embodiments of the utility model and should not be taken as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.
Claims (9)
1. The foundation pit combined supporting structure in the complex environment is characterized by comprising a combined supporting structure formed by a cast-in-place pile supporting structure and a soil nailing wall supporting structure, wherein the cast-in-place pile supporting structure and the soil nailing wall supporting structure are arranged on one side, close to an obstacle, of a foundation pit; the soil nailing wall supporting structure adjacent to one side of the barrier is arranged on a disturbance prohibiting area above the underpass structure and the slope side wall of the foundation pit; the cast-in-place pile supporting structure adjacent to one side of the obstacle is arranged close to two sides of the soil nailing wall supporting structure, the cast-in-place pile supporting structure comprises a first cast-in-place pile supporting structure arranged along a side line of the foundation pit adjacent to one side of the obstacle and a second cast-in-place pile supporting structure arranged in an area between the first cast-in-place pile supporting structure and the slope of the soil nailing wall supporting structure, and the arrangement direction of the first cast-in-place pile supporting structure and the arrangement direction of the second cast-in-place pile supporting structure are vertical; the soil nail wall supporting structure is characterized in that soil nail holes are formed in the side wall, close to one side of the barrier, of the foundation pit, a plurality of ribbed steel bars are adopted as soil nails by the soil nail wall supporting structure, and cement slurry is poured into the soil nail holes to strengthen soil around the foundation pit.
2. The foundation pit combined supporting structure in a complex environment according to claim 1, further comprising supporting structures arranged on other three side walls of the foundation pit, wherein the supporting structures arranged on other three side walls of the foundation pit reasonably select supporting structure forms according to whether barriers exist on the periphery or not.
3. The foundation pit combined supporting structure in a complex environment according to claim 2, wherein the supporting structure forms of other three side walls of the foundation pit comprise at least one of soil nailing wall supporting, filling pile supporting and slope-releasing excavation supporting.
4. The foundation pit combined supporting structure under a complex environment according to claim 1, wherein the first bored concrete pile supporting structure is arranged in a shape of a line on two sides of the soil nailing wall supporting structure, and the first bored concrete pile supporting structure and the second bored concrete pile supporting structure are arranged in a shape of an L.
5. The foundation pit combined supporting structure in a complex environment according to claim 1, wherein a third bored concrete pile supporting structure is arranged at a corner of the side wall of the foundation pit adjacent to one side of the obstacle, and the third bored concrete pile supporting structure is perpendicular to the first bored concrete pile supporting structure.
6. The foundation pit combined supporting structure in a complex environment according to claim 1, wherein the distance between the cast-in-place pile supporting structure and the profile line of a disturbance-forbidden structure below the foundation pit is not less than 3m.
7. The foundation pit combined supporting structure in a complex environment according to claim 1, wherein the slope of the soil nailing wall slope adjacent to one side of the obstacle is not slower than 1:0.5.
8. The foundation pit composite support structure under a complex environment according to claim 1, wherein the obstacle is a railway and the underpass structure is an underpass subway.
9. The foundation pit combined supporting structure in a complex environment according to claim 1, wherein the cast-in-place piles of the cast-in-place pile supporting structure are buried in the lower portion of the foundation pit to a designed depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321709654.2U CN220266571U (en) | 2023-06-30 | 2023-06-30 | Foundation pit combined supporting structure under complex environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321709654.2U CN220266571U (en) | 2023-06-30 | 2023-06-30 | Foundation pit combined supporting structure under complex environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220266571U true CN220266571U (en) | 2023-12-29 |
Family
ID=89306100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321709654.2U Active CN220266571U (en) | 2023-06-30 | 2023-06-30 | Foundation pit combined supporting structure under complex environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220266571U (en) |
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2023
- 2023-06-30 CN CN202321709654.2U patent/CN220266571U/en active Active
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