CN212534139U - Subway foundation pit slope supporting construction - Google Patents
Subway foundation pit slope supporting construction Download PDFInfo
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- CN212534139U CN212534139U CN202020557174.9U CN202020557174U CN212534139U CN 212534139 U CN212534139 U CN 212534139U CN 202020557174 U CN202020557174 U CN 202020557174U CN 212534139 U CN212534139 U CN 212534139U
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Abstract
The utility model relates to a subway foundation pit slope supporting structure, including vertical reinforcement unit, slope tangential support unit, drainage unit, vertical reinforcement unit is from waiting to consolidate the soil body at slope top vertically downwards and anchor in the soil body, slope tangential support unit sets up on the domatic of side slope to be strutted, and its perpendicular and anchor in the soil body of side slope domatic rear end to be strutted, drainage unit sets up in the bottom of side slope domatic to be strutted, and it is used for getting rid of the groundwater in the supporting structure soil body; when the vertical reinforcing unit, the slope tangential supporting unit and the drainage unit are anchored in soil at the rear end of the slope surface of the slope to be supported, a novel slope supporting structure with collapse prevention, tangential shear resistance and drainage functions is formed; through the scheme, the technology for further preventing the side slope from collapsing on the premise of realizing the shear-resisting function of the side slope is realized.
Description
Technical Field
The utility model relates to a civil engineering deep basal pit's technical field especially relates to deep basal pit and side slope support engineering's technical field, and specifically speaking is a subway foundation pit side slope supporting construction.
Background
As the urbanization process of China moves into the high-speed development stage, high-rise buildings in various regions emerge endlessly, and the requirement for the utilization of underground space is improved, so that the foundation pit is deeper and deeper. The following safety accidents of the deep foundation pit are more and more frequent. In urban foundation pit construction, the slope coefficient of the side slope is greatly limited, and the complicated proximity condition and the hydrogeological condition cause great potential safety hazards to the side slope of the foundation pit. The stability of the side slope also affects the safety of surrounding buildings, and the instability, large deformation and damage of the side slope can cause uneven settlement of the surrounding buildings, so that the buildings incline, crack and even collapse, and huge economic loss is caused to the country and the society.
The existing foundation pit slope support has a plurality of modes, and the row pile type support structure taking cast-in-situ bored piles or reinforced concrete slabs as main bodies, underground continuous walls, cement-soil walls, deep-layer stirring cement-soil enclosure walls, high-pressure jet grouting piles, an SMW construction method and the like are adopted. The methods have the defects of high material consumption, complex construction, high environmental pollution and incapability of dynamically adjusting the support, so that a foundation pit slope support method which is reasonable in material consumption, simple in construction and capable of being dynamically adjusted is urgently needed.
The technical problems in the technical scheme disclosed by the technology are as follows:
although the slope supporting technology is realized in the prior art, the prior art supports the slope from the side slope shearing angle, and does not consider the technical defects of slope collapse and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the subway foundation pit slope supporting structure is used for solving the technical defect that the slope collapse prevention is not considered in the existing slope supporting technology. This side slope supporting construction has realized preventing the technique that the side slope sinks through setting up vertical reinforcement unit, side slope tangential supporting unit, drainage unit, catch basin isotructure. Adopt the utility model discloses can effectively realize the technique that the side slope sinks is further prevented under the prerequisite that realizes the side slope function of shearing afterwards.
In order to realize the technical scheme, the utility model discloses a following technical scheme realizes:
a subway foundation pit slope supporting structure comprises a vertical reinforcing unit, a slope tangential supporting unit and a drainage unit, wherein the vertical reinforcing unit is vertically downwards anchored in a soil body from the top of a slope to be reinforced, the slope tangential supporting unit is arranged on a slope surface of the slope to be supported and is vertically anchored in the soil body at the rear end of the slope surface of the slope to be supported, and the drainage unit is arranged at the bottom end of the slope surface of the slope to be supported and is used for draining underground water in the soil body of the supporting structure;
the vertical reinforcing unit is formed by anchoring a plurality of sleeve valve pipes in a soil body at the rear end of the slope surface of the slope to be supported, each sleeve valve pipe comprises a plurality of grout stop rings, a plurality of grout overflow holes and PVC pipes, the grout overflow holes are uniformly distributed on the pipe body of each PVC pipe at intervals, and the grout stop rings are uniformly distributed on the pipe body of each PVC pipe which is not provided with the grout overflow holes;
when the vertical reinforcing unit, the slope tangential supporting unit and the drainage unit are anchored in the soil body at the rear end of the slope surface to be supported, a novel slope supporting structure with collapse prevention, tangential shear resistance and drainage functions is formed.
In order to better realize the utility model discloses, as above-mentioned technical scheme's further description, subway foundation ditch side slope supporting construction's bottom and top all the level are provided with the catch basin.
As a further description of the above technical solution, the drainage unit includes a plurality of drainage pipes, one end of each drainage pipe is horizontally and deeply buried in the soil mass at the rear end of the slope surface of the side slope to be supported, and the other end of each drainage pipe is communicated with the catch drain at the lower end of the side slope.
As a further description of the above technical solution, the side slope tangential support unit includes a plurality of soil nails, a steel bar mesh, a concrete layer, and a mortar body, one end of each soil nail is deeply buried in a soil body at the rear end of the slope surface of the side slope to be supported, the other end of each soil nail is welded to the steel bar mesh, the steel bar mesh is disposed on the slope surface of the side slope to be supported, the mortar body is formed by pouring mixed mortar into holes for installing the soil nails, and the concrete layer is formed by pouring mixed concrete on the slope surface of the side slope on which the steel bar mesh is installed.
As the further description of the technical scheme, the drain pipe comprises a plurality of holes and a filter layer, the holes are uniformly distributed on the pipe body of the drain pipe, and the filter layer is arranged on the outer wall of the drain pipe.
As further description of the technical scheme, the horizontal distance between the sleeve valve pipe and the top of the slope is 1-2m, and the distance between the sleeve valve pipe and the top of the slope is 1-3 m.
As further described in the above technical solutions, the drain pipes are arranged along the side slope and the distance between the drain pipes is 1-3 m.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
this novel foundation ditch side slope supporting construction has fully considered the reinforced promptness of foundation ditch side slope, and construction process is simple, can in time execute and do. In addition, the supporting structure has good bearing capacity and deformation resistance, grouting reinforcement can be carried out by tracking field monitoring results, cost can be effectively saved, and reliability of the supporting structure is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic structural view of the vertical reinforcing unit of the present invention;
FIG. 3 is a schematic side view of the tangential support unit of the utility model;
FIG. 4 is a schematic view of the plane structure of the tangential support unit of the side slope of the present invention;
fig. 5 is a schematic structural view of the drainage unit of the present invention.
The figure is marked with 1-vertical reinforcement unit, 2-slope tangential support unit, 3-drainage unit, 4-intercepting ditch, 11-grout stopping ring, 12-grout overflow hole, 13-PVC pipe, 21-soil nail, 22-reinforcing mesh, 23-concrete layer, 24-mortar body, 31-hole and 32-filter layer.
Detailed Description
The present invention will be described in detail and with reference to the preferred embodiments of the present invention, but the present invention is not limited thereto.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
The terms "upper", "lower", "left", "right", "inner", "outer", and the like refer to orientations or positional relationships based on the drawings, or the orientations or positional relationships that are conventionally used to place the products of the present invention, and are used for convenience in describing the present invention and simplifying the description, but 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 therefore should not be construed as limiting the present invention.
Furthermore, the terms "vertical" and the like do not require absolute perpendicularity between the components, but may be slightly inclined. Such as "vertical" merely means that the direction is relatively more vertical and does not mean that the structure must be perfectly vertical, but may be slightly inclined.
In the description of the present invention, it is also to be understood that the terms "disposed," "mounted," "connected," and the like are intended to be construed broadly unless otherwise specifically indicated and limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as a preferred embodiment, the embodiment takes a structure in which the depth of a foundation pit is 1.5m, and a soil nail 21 and a side slope to be supported are reinforced downward at an angle of 30 degrees, as shown in fig. 1 to 5;
a subway foundation pit slope supporting structure comprises a vertical reinforcing unit 1, a slope tangential supporting unit 2 and a drainage unit 3, wherein the vertical reinforcing unit 1 is vertically downwards anchored in a soil body from the top of a slope to be reinforced, the slope tangential supporting unit 2 is arranged on a slope surface of the slope to be supported and is vertically anchored in the soil body at the rear end of the slope surface of the slope to be supported, and the drainage unit 3 is arranged at the bottom end of the slope surface of the slope to be supported and is used for draining underground water in the soil body of the supporting structure;
the vertical reinforcing unit 1 is formed by anchoring a plurality of sleeve valve pipes in a soil body at the rear end of a slope surface of a slope to be supported, each sleeve valve pipe comprises a plurality of grout stopping rings 11, a plurality of grout overflow holes 12 and PVC pipes 13, the grout overflow holes 12 are uniformly distributed on a pipe body of the PVC pipe 13 at intervals, and the grout stopping rings 11 are uniformly distributed on the pipe body of the PVC pipe 13 without the grout overflow holes 12;
when the vertical reinforcing unit 1, the slope tangential supporting unit 2 and the drainage unit 3 are anchored in the soil body at the rear end of the slope surface to be supported, a novel slope supporting structure with collapse prevention, shear resistance in the tangential direction and drainage is formed.
In a preferred embodiment, the sleeve valve pipe in the embodiment adopts a PVC pipe 13 with a diameter of phi 48 mm.
For clearer and more specific explanation of the present invention, as a preferred embodiment, the length of the sleeve valve tube in this embodiment is greater than the depth of the foundation pit.
In order to better realize the utility model discloses, as above-mentioned technical scheme's further description, subway foundation ditch side slope supporting construction's bottom and top are all horizontally provided with catch basin 4.
As a further description of the above technical solution, the drainage unit 3 includes a plurality of drainage pipes, one end of each drainage pipe is horizontally and deeply buried in the soil body at the rear end of the slope surface of the side slope to be supported, and the other end of each drainage pipe is communicated with the intercepting ditch 4 at the lower end of the side slope.
In a preferred embodiment, the drainage pipe in this embodiment is a PVC pipe 13 with a diameter of 60mm, the pipe surface of the pipeline in the soil is covered with small holes, the pipeline is covered with a non-woven fabric as a filter layer 32, and the drainage pipe is horizontally inserted into the soil at a distance of 2 m.
As a further description of the above technical solution, the slope tangential support unit 2 includes a plurality of soil nails 21, a steel bar net 22, a concrete layer 23, and a mortar body 24, one end of the soil nail 21 is deeply buried in the soil body at the rear end of the slope surface to be supported, the other end is welded to the steel bar net 22, the steel bar net 22 is disposed on the slope surface of the slope surface to be supported, the mortar body 24 is formed by pouring mixed mortar into the hole 31 of the soil nail 21, and the concrete layer 23 is formed by pouring mixed concrete on the slope surface with the steel bar net 22.
In order to more clearly and clearly explain the present invention, as a preferred embodiment, the soil nail 21 in this embodiment is composed of a bearing plate and a ribbed steel bar, wherein the bearing plate is a steel plate with a length and a width of 150mm and a thickness of 10 mm; the soil nails 21 adopted by the ribbed steel bars are HRB 400-grade ribbed steel bars with the length of 7m and the diameter of 25mm, the arrangement distance is 1m, the soil body is implanted into the slope surface in a vertical mode, the slope surface is exposed by 200mm, and the end parts of the soil nails are welded with the bearing plates.
For the sake of clarity and clarity, the present invention is preferably implemented such that the concrete layer has an anti-permeability grade P10 and the concrete surface layer is flush with the bearing plate of the soil nail.
As a further description of the above technical solution, the drain pipe includes a plurality of holes 31 and a filter layer 32, the holes 31 are uniformly distributed on the pipe body of the drain pipe, and the filter layer 32 is disposed on the outer wall of the drain pipe 3.
For clarity and clarity of the present invention, the filter layer 32 is a non-woven fabric in this embodiment.
As further description of the technical scheme, the horizontal distance between the sleeve valve pipe and the top of the slope is 1-2m, and the distance between the sleeve valve pipe and the top of the slope is 1-3 m.
For clearer and more definite explanation of the present invention, as a preferred embodiment, the horizontal distance between the sleeve valve tube and the top of the slope is 2 meters, and the horizontal arrangement distance along the side of the foundation pit is 2 meters.
As further described in the above technical solutions, the drain pipes are arranged along the side slope and the distance between the drain pipes is 1-3 m.
For clearer and more definite explanation of the present invention, as a preferred embodiment, the horizontal arrangement distance of the drain pipes described in this embodiment is 2 meters one.
As a preferred embodiment, as shown in FIG. 4, the subway foundation pit slope supporting structure of this embodiment
For better realization the utility model discloses, as preferred embodiment, as shown in fig. 1 ~ 5, the utility model discloses a work flow is: firstly, brushing a slope of a foundation pit and leveling the slope, further measuring and discharging an installation point of a soil nail 21 and a grouting point of a sleeve valve pipe, further drilling a hole in the discharged point by using drilling equipment, cleaning the hole after the drilling is finished, further installing the soil nail 21, further configuring mortar and injecting the mortar into the drilled hole provided with the soil nail 21, further installing a reinforcing mesh 22, further pouring concrete to form concrete on the slope, further installing the sleeve valve pipe, further configuring and injecting the mortar into the sleeve valve pipe, further horizontally drilling and cleaning the hole by using the drilling equipment, further installing a drain pipe, and finally forming a novel slope supporting structure.
During specific implementation, the slope is drilled at an interval of 1m and a depth of 7m, then the soil nails are inserted into the holes, the soil nails are shown in fig. 3 and are composed of bearing plates and ribbed steel bars, the ribbed steel bars can provide strong cementing capacity, the soil nails used for the ribbed steel bars, which are not suitable for slipping between the soil body and the soil body, are HRB 400-grade ribbed steel bars with a length of 7m and a diameter of 25mm, the arrangement interval is 1m, the soil body is implanted into the slope perpendicular to the slope surface, and the slope surface is exposed by 200 mm. The end part is welded with the bearing plate, the bearing plate is a steel plate with the length and width of 150mm and the thickness of 10mm, and the cementing capacity of the soil nails and the concrete layer can be effectively improved. Then pouring mortar into the hole.
The utility model has the advantages of it is following and beneficial effect:
this novel foundation ditch side slope supporting construction has fully considered the reinforced promptness of foundation ditch side slope, and construction process is simple, can in time execute and do. In addition, the supporting structure has good bearing capacity and deformation resistance, grouting reinforcement can be carried out by tracking field monitoring results, cost can be effectively saved, and reliability of the supporting structure is improved.
Through the scheme, the technology for further preventing the side slope from collapsing on the premise of realizing the shear-resisting function of the side slope is realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a subway foundation pit slope supporting construction which characterized in that: the device comprises a vertical reinforcing unit (1), a side slope tangential supporting unit (2) and a drainage unit (3), wherein the vertical reinforcing unit (1) is vertically downwards anchored in a soil body from the top of a side slope, the side slope tangential supporting unit (2) is arranged on a slope surface of the side slope to be supported and is vertically anchored in the soil body at the rear end of the slope surface of the side slope, and the drainage unit (3) is arranged at the bottom end of the slope surface of the side slope to be supported and is used for draining underground water in the soil body of a supporting structure;
the vertical reinforcement unit (1) is formed by anchoring a plurality of sleeve valve pipes in the soil body at the rear end of the slope surface of the side slope, each sleeve valve pipe comprises a plurality of grout stop rings (11), a plurality of grout overflow holes (12) and a PVC (polyvinyl chloride) pipe (13), the grout overflow holes (12) are uniformly distributed on the pipe body of the PVC pipe (13) at intervals, and the grout stop rings (11) are uniformly distributed on the pipe body of the PVC pipe (13) without the grout overflow holes (12).
2. A subway foundation pit slope supporting structure as claimed in claim 1, wherein: and the bottom end and the top end of the subway foundation pit side slope supporting structure are both horizontally provided with a catch basin (4).
3. A subway foundation pit slope supporting structure as claimed in claim 2, wherein: the drainage unit (3) comprises a plurality of drainage pipes, one ends of the drainage pipes are horizontally and deeply buried in soil at the rear end of the slope surface of the side slope to be supported, and the other ends of the drainage pipes are communicated with the intercepting ditches (4) at the lower end of the side slope.
4. A subway foundation pit slope supporting structure as claimed in claim 2, wherein: slope tangential support unit (2) includes a plurality of soil nails (21), reinforcing bar net (22), concrete layer (23), the mortar body (24), the one end of soil nail (21) is buried deeply in waiting to support the soil body of the domatic rear end of side slope, and the other end welds with reinforcing bar net (22), reinforcing bar net (22) set up on waiting to support the domatic of side slope, form in the hole of installation soil nail (21) is poured into by the mortar of mixing, concrete layer (23) are formed on the slope surface of side slope of installing reinforcing bar net (22) by the concrete placement of mixing.
5. A subway foundation pit slope supporting structure as claimed in claim 3, wherein: the drain pipe comprises a plurality of holes (31) and a filter layer (32), wherein the holes (31) are uniformly distributed on the pipe body of the drain pipe, and the outer wall of the drain pipe is provided with the filter layer (32).
6. A subway foundation pit slope supporting structure as claimed in claim 5, wherein: the horizontal distance between the sleeve valve pipes and the edge of the top of the slope is 1-2m, the sleeve valve pipes are arranged along the edge of the foundation pit, and the spacing distance between the sleeve valve pipes is 1-3 m.
7. A subway foundation pit slope supporting structure as claimed in claim 6, wherein: the drain pipes are arranged along the side slope, and the distance between the drain pipes is 1-3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020557174.9U CN212534139U (en) | 2020-04-15 | 2020-04-15 | Subway foundation pit slope supporting construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020557174.9U CN212534139U (en) | 2020-04-15 | 2020-04-15 | Subway foundation pit slope supporting construction |
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| CN212534139U true CN212534139U (en) | 2021-02-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075192A (en) * | 2022-07-11 | 2022-09-20 | 中化学生态水利建设有限公司 | Method and device for processing high slope of spillway of hydro-junction engineering |
-
2020
- 2020-04-15 CN CN202020557174.9U patent/CN212534139U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075192A (en) * | 2022-07-11 | 2022-09-20 | 中化学生态水利建设有限公司 | Method and device for processing high slope of spillway of hydro-junction engineering |
| CN115075192B (en) * | 2022-07-11 | 2023-10-03 | 中化学生态水利建设有限公司 | Method and device for treating spillway high slope of hydraulic junction engineering |
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