CN213417830U - Self-stabilizing type supporting structure and system for adjacent foundation pit limited soil body - Google Patents
Self-stabilizing type supporting structure and system for adjacent foundation pit limited soil body Download PDFInfo
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- CN213417830U CN213417830U CN202021203224.XU CN202021203224U CN213417830U CN 213417830 U CN213417830 U CN 213417830U CN 202021203224 U CN202021203224 U CN 202021203224U CN 213417830 U CN213417830 U CN 213417830U
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Abstract
The application provides a confined soil body of adjacent foundation ditch self-stabilization type supporting construction and supporting system belongs to foundation ditch construction technical field. In view of the characteristics of complexity and high difficulty of construction conditions of the limited soil body, the self-stabilizing type supporting structure of the limited soil body of the adjacent foundation pit firstly adopts the triple reinforcing effect of the first protective wall, the first protective pile and the first water stop pile to support the limited soil body and reduce deformation and damage of the limited soil body. Then the limited soil body forms a whole with the adjacent first fender pile and the second fender pile of both sides through the stock, has restricted the deformation destruction of limited soil body. The cast-in-place pile is used for improving the rock mass property of the limited soil body, improving the strength of the limited soil body, reducing the deformation of the limited soil body and improving the stability of the limited soil body.
Description
Technical Field
The application relates to the technical field of foundation pit construction, in particular to a self-stabilizing supporting structure and a supporting system for a limited soil body adjacent to a foundation pit.
Background
The traditional tunnel design mainly adopts a separated tunnel, and the separated tunnel occupies large land and has large influence on the environment. With the development of tunnel construction technology and the restriction of complex urban construction environment, the small clear distance tunnel construction gradually becomes the development direction of urban tunnels, and the limited soil is the difficult point and the key of the small clear distance tunnel construction.
The construction of the small clear distance tunnel necessarily involves a parallel foundation pit, but the current parallel foundation pit construction method is mainly suitable for hard limited soil bodies and is directly used for the construction of soft limited soil bodies, and the limited soil bodies have large deformation and poor stability.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present application provides a self-stabilizing supporting structure and a supporting system for a soil mass adjacent to a limited foundation pit, and aims to provide a supporting structure suitable for a weak limited soil mass, reduce deformation of the limited soil mass, and improve stability of the limited soil mass.
In a first aspect, the present embodiment provides a self-stabilizing supporting structure for a limited soil body adjacent to a foundation pit, including a first protective structure, a second protective structure, the limited soil body, and an anchoring structure.
The first protection structure comprises a first protection wall, a first protection pile and a first water stop pile, and the first water stop pile is arranged between the first protection pile and the first protection wall.
The second protection structure comprises a second protection wall, a second protection pile and a second water stop pile, and the second water stop pile is arranged between the second protection pile and the second protection wall.
The second protection structure comprises a second protection wall, a second protection pile and a second water stop pile, wherein the second protection wall is arranged on the inner wall of the second foundation pit, and the second water stop pile is arranged between the second protection pile and the second protection wall.
And two sides of the limited soil body are respectively connected with the first protection wall and the second protection wall.
The anchoring structure comprises a filling pile, an anchor rod and anchoring devices arranged at two ends of the anchor rod, the filling pile is arranged in the limited soil body, the anchor rod penetrates through the limited soil body, and the anchoring devices are respectively abutted against the outer wall of the first protection pile and the outer wall of the second protection pile.
In a specific embodiment, the first protective wall includes a first steel grating and a first concrete body, the second protective wall includes a second steel grating and a second concrete body, the first concrete body is poured in the first steel grating, the second concrete body is poured in the second steel grating, and two ends of the anchor rod respectively penetrate through the first steel grating and the second steel grating.
In a specific embodiment, the first protection wall comprises a first protection net and a first pile wall, the first protection net is laid on the side wall of the limited soil body, and the first protection net is arranged between the limited soil body and the first pile wall.
In a specific embodiment, the second protection wall comprises a second protection net and a second pile wall, the second protection net is laid on the side wall of the confined soil body, and the second protection net is arranged between the confined soil body and the second pile wall.
In a specific implementation scheme, the bored concrete pile includes steel reinforcement cage, pipe and slip casting body, the drilling has been seted up to the restricted soil body, the steel reinforcement cage cover is located the pipe just the steel reinforcement cage with the pipe all buries underground in the drilling, the slip casting body is pour in the drilling.
In a specific embodiment, the catheter has a diameter of 42mm and a thickness of 4 mm.
In a particular embodiment, the bore is provided in a plurality, a plurality of which are spaced apart in rows.
In a particular embodiment, said bore hole is provided in a plurality, said plurality being distributed in a quincunx pattern.
In a particular embodiment, the slip casting consists of concrete casting.
In a particular embodiment, the anchor is threadedly connected to the bolt.
In a second aspect, the application provides a confined soil self-stabilizing support system for an adjacent foundation pit, which comprises a parallel foundation pit and a confined soil self-stabilizing support structure for the adjacent foundation pit.
The parallel foundation pit comprises a first foundation pit and a second foundation pit, and the limited soil body is arranged between the first foundation pit and the second foundation pit.
The utility model has the advantages that: in view of the characteristics of complexity and great difficulty of construction conditions of the limited soil body, the self-stabilizing type supporting structure of the limited soil body adjacent to the foundation pit firstly adopts the triple reinforcing effect of the first protective wall, the first protective pile and the first water stop pile to support the limited soil body and reduce deformation and damage of the limited soil body. Then the limited soil body forms a whole with the adjacent first fender pile and the second fender pile of both sides through the stock, has restricted the deformation destruction of limited soil body. The cast-in-place pile is used for improving the rock mass property of the limited soil body, improving the strength of the limited soil body, reducing the deformation of the limited soil body and improving the stability of the limited soil body.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a parallel foundation pit supporting structure of a weak and limited soil body provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a confined soil self-stabilizing supporting structure of an adjacent foundation pit according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a first protective wall provided in the embodiment of the present application;
fig. 4 is a schematic structural diagram of a second protective wall provided in the embodiment of the present application;
fig. 5 is a schematic structural diagram of an injection pile provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a confined soil self-stabilizing support system for an adjacent foundation pit according to an embodiment of the present application.
Icon: 10-adjoining foundation pit limited soil body self-stabilizing type supporting system; 100-adjacent foundation pit limited soil body self-stabilizing type supporting structure; 110 — a first guard structure; 111-a first protective wall; 1111-a first steel grid; 1113-first concrete body; 113-a first fender post; 115-a first waterstop pile; 130-a second protective structure; 131-a second protective wall; 1311-a second steel grid; 1313-a second concrete body; 133-a second fender post; 135-a second waterstop pile; 150-confined soil mass; 170-anchoring structure; 171-pouring piles; 1711-steel reinforcement cage; 1713-a catheter; 173-anchor rod; 175-an anchor; 300-parallel foundation pit; 310-a first foundation pit; 330-second foundation pit.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
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 work 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 is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify 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 "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
The traditional tunnel design mainly adopts a separated tunnel, and the separated tunnel occupies large land and has large influence on the environment. With the development of tunnel construction technology and the restriction of complex urban construction environment, the small clear distance tunnel construction gradually becomes the development direction of urban tunnels, and the limited soil is the difficult point and the key of the small clear distance tunnel construction.
The construction of the small clear distance tunnel necessarily involves a parallel foundation pit, but the current parallel foundation pit construction method is mainly suitable for hard limited soil bodies and is directly used for the construction of soft limited soil bodies, and the limited soil bodies have large deformation and poor stability.
Therefore, the application provides a self-stabilizing type supporting structure and a supporting system for a limited soil body adjacent to a foundation pit, and aims to provide a supporting structure suitable for a weak limited soil body, reduce the deformation of the limited soil body and improve the stability of the limited soil body.
Fig. 1 shows a schematic structural diagram of a self-stabilizing supporting structure of a limited soil body adjacent to a foundation pit. Referring to fig. 1, the confined soil self-stabilizing supporting structure 100 for an adjacent foundation pit includes a first protective structure 110, a second protective structure 130, a confined soil 150, and an anchoring structure 170.
Wherein the confined soil mass 150 is located between the first protective structure 110 and the second protective structure 130. The limited soil body 150 is used as a middle rock pillar of the parallel foundation pit, and the construction of the limited soil body 150 is the technical key of the foundation pit construction.
Fig. 2 shows a schematic structural diagram of a self-stabilizing supporting structure of a limited soil body adjacent to a foundation pit. Referring to fig. 2, the first protection structure 110 includes a first protection wall 111, a first protection pile 113 and a first water stop pile 115, and the first water stop pile 115 is disposed between the first protection pile 113 and the first protection wall 111.
The first protective wall 111 is tightly attached to the side wall of the limited soil mass 150, and the first protective wall 111, the first water stop pile 115 and the first protective pile 113 are sequentially arranged on the side wall of the limited soil mass 150.
In some specific embodiments, the first protective wall 111 includes a first protective net and a first pile wall, the first protective net is laid on the sidewall of the confined soil 150 and the first protective net is disposed between the confined soil 150 and the first pile wall. In a particular arrangement, the first pile wall may be formed from reinforced concrete casting. The first protection net may be a wire mesh.
During construction, the first protective net can be used for spraying the limited soil body 150 side wall to protect the wall, the primary stability of the limited soil body 150 side wall is maintained, the limited soil body 150 rock-soil body is prevented from falling, and then the formwork is used for carrying out concrete pouring work of the first pile wall.
With reference to fig. 2, the second protective structure 130 includes a second protective wall 131, a second protective pile 133 and a second water-stopping pile 135, the second protective wall 131 is disposed on the sidewall of the confined soil 150, and the second water-stopping pile 135 is disposed between the second protective pile 133 and the second protective wall 131.
The second protective wall 131 is tightly attached to the side wall of the confined soil body 150, and the second protective wall 131, the second water stop pile 135 and the second protective pile 133 are sequentially arranged on the side wall of the confined soil body 150.
In some specific embodiments, the second protection wall 131 includes a second protection net and a second pile wall, the second protection net is laid on the sidewall of the confined soil 150 and the second protection net is disposed between the confined soil 150 and the second pile wall. In a particular arrangement, the second pile wall may be formed from reinforced concrete casting. The second protection net may be a wire mesh.
Referring to fig. 3 and 4, in other embodiments, the first protective wall 111 includes a first steel grating 1111 and a first concrete body 1113, and the second protective wall 131 includes a second steel grating 1311 and a second concrete body 1313. In the specific setting, the side length of the first steel grating 1111 and the second steel grating 1311 is 20-25 cm, and the first steel grating and the second steel grating are square.
First concrete 1113 is poured into first steel grating 1111, that is, first concrete 1113 is poured into the hollow cavity of first steel grating 1111, second concrete 1311 is poured into second steel grating 1311, and both ends of anchor 173 penetrate through first steel grating 1111 and second steel grating 1311 respectively.
Here, both ends of the anchor rod 173 penetrate the first steel grating 1111 and the second steel grating 1311, respectively. Anchor 173 may be fixedly connected (e.g., welded) to first steel grating 1111 and second steel grating 1311, and anchor 173 may also be movably connected to first steel grating 1111 and second steel grating 1311. When anchor rod 173 is movably connected with first steel grating 1111 and second steel grating 1311, anchor rod 173 is fixed mainly by means of anchor 175, such that anchor rod 173 abuts against the outer wall of first fender pile 113 and the outer wall of second fender pile 133.
With continued reference to fig. 2, the anchoring structure 170 includes a cast-in-place pile 171, an anchor rod 173 and an anchor 175 disposed at both ends of the anchor rod 173, the cast-in-place pile 171 is disposed inside the confined soil 150 and the anchor rod 173 penetrates through the confined soil 150, and the anchor 175 abuts against the outer wall of the first protection pile 113 and the outer wall of the second protection pile 133, respectively. In the present application, the anchor rod 173 penetrates the confined soil body 150 and the first and second piles 113 and 133 adjacent to both sides of the confined soil body 150, wherein both ends of the anchor rod 173 are connected with the anchors 175, respectively, to fasten the anchor rod 173. In particular arrangements, anchor rod 173 may be threaded or snap-fit with anchor 175.
Referring to fig. 5, in some embodiments, the cast-in-place pile 171 includes a reinforcement cage 1711, a conduit 1713, and a grouting material (not shown), the confined soil body 150 is provided with a borehole, the reinforcement cage 1711 is sleeved on the conduit 1713, the reinforcement cage 1711 and the conduit 1713 are both embedded in the borehole, and the grouting material is poured in the borehole.
In the present application, the anchor rod 173 penetrates through the confined soil mass 150 and the first and second fender piles 113 and 133 adjacent to two sides of the confined soil mass 150, and the confined soil mass 150 is integrated with the first and second fender piles 113 and 133 adjacent to two sides through the anchor rod 173, so that deformation and damage of the confined soil mass 150 are limited. In addition, the cast-in-place pile 171 is buried in the limited soil body 150 through the guide pipe 1713, the rock mass property of the limited soil body 150 is improved, particularly for the limited soil body 150 with weak lithology, the stability and the bearing capacity of the limited soil body 150 can be greatly improved through the matching of the reinforcement cage 1711 and the guide pipe 1713 and the injection of slurry in a drill hole, so that the deformation of the limited soil body 150 is reduced, and the stability of the limited soil body 150 is further improved.
In a particular arrangement, the conduit 1713 has a diameter of 42mm and a thickness of 4 mm. In order to reduce the movement of the filling pile 171 to the confined soil body 150, the conduit 1713 is not suitable for the conduit 1713 with an excessively large diameter.
In a particular embodiment, the bore is provided in a plurality, spaced apart in rows. The bore holes may also take other arrangements, for example: the plurality of drilled holes are distributed in a quincunx shape.
In specific implementation, a borehole is drilled in the confined soil body 150, the conduit 1713 is placed in the borehole, then the reinforcement cage 1711 is placed in the borehole along the conduit 1713, and the conduit 1713 is sleeved with the reinforcement cage 1711. And finally, grouting into the drill hole to form grouting body.
In view of the characteristics of complexity and difficulty of construction conditions of the limited soil body, the self-stabilizing supporting structure 100 for the limited soil body adjacent to the foundation pit firstly adopts the triple reinforcing effect of the first protective wall 111, the first protective pile 113 and the first water stop pile 115 to support the limited soil body 150, and reduces deformation and damage of the limited soil body 150. Then the limited soil body 150 is integrated with the first protection piles 113 and the second protection piles 133 adjacent to the two sides through the anchor rods 173, and deformation and damage of the limited soil body 150 are limited. The cast-in-place pile 171 is used for improving the rock mass property of the confined soil mass 150, improving the strength of the confined soil mass 150, reducing the deformation of the confined soil mass 150 and improving the stability of the confined soil mass 150.
Fig. 6 shows a schematic structural diagram of a self-stabilizing type supporting system of a limited soil body adjacent to a foundation pit. Please refer to fig. 6. The application further provides a self-stabilizing supporting system 10 for the limited soil body of the adjacent foundation pit, which comprises a self-stabilizing supporting structure 100 for the limited soil body of the adjacent foundation pit and a parallel foundation pit 300.
The parallel foundation pit 300 includes a first foundation pit 310 and a second foundation pit 330.
The confined soil 150 is disposed between the first foundation pit 310 and the second foundation pit 330.
The above is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A self-stabilizing supporting structure of a soil body limited by an adjacent foundation pit is characterized by comprising
The first protective structure comprises a first protective wall, a first protective pile and a first water stop pile, and the first water stop pile is arranged between the first protective pile and the first protective wall;
the second protective structure comprises a second protective wall, a second protective pile and a second water stopping pile, and the second water stopping pile is arranged between the second protective pile and the second protective wall;
the two sides of the limited soil body are respectively connected with the first protection wall and the second protection wall;
the anchoring structure comprises a filling pile, an anchor rod and anchoring devices arranged at two ends of the anchor rod, wherein the filling pile is arranged in the limited soil body, the anchor rod penetrates through the limited soil body, and the anchoring devices are respectively abutted to the outer wall of the first protection pile and the outer wall of the second protection pile.
2. The confined soil self-stabilizing support structure for an adjoining foundation pit according to claim 1, wherein the first protective wall comprises a first steel grating and a first concrete body, the second protective wall comprises a second steel grating and a second concrete body, the first concrete body is cast in the first steel grating, the second concrete body is cast in the second steel grating, and two ends of the anchor rod respectively penetrate through the first steel grating and the second steel grating.
3. The confined soil self-stabilizing supporting structure for an adjoining foundation pit as claimed in claim 1, wherein the first protective wall comprises a first protective net and a first pile wall, the first protective net is laid on the side wall of the confined soil and the first protective net is arranged between the confined soil and the first pile wall.
4. The confined soil self-stabilizing supporting structure for adjacent foundation pits according to claim 1, wherein the second protective wall comprises a second protective net and a second pile wall, the second protective net is laid on the side wall of the confined soil and the second protective net is arranged between the confined soil and the second pile wall.
5. The confined soil self-stabilizing support structure for adjacent foundation pits as claimed in claim 1, wherein the cast-in-place pile comprises a reinforcement cage, a conduit and a grout, the confined soil is provided with a borehole, the conduit is sleeved with the reinforcement cage, the reinforcement cage and the conduit are both embedded in the borehole, and the grout is poured in the borehole.
6. A confined soil mass self-stabilizing support structure for an adjoining foundation pit as claimed in claim 5, wherein the conduit is 42mm in diameter and 4mm thick.
7. A confined soil mass self-stabilizing support structure for an adjacent foundation pit as claimed in claim 5, wherein the boreholes are arranged in a plurality spaced apart rows.
8. A confined soil mass self-stabilizing support structure for an adjoining foundation pit according to claim 5, wherein said grout is formed by concrete pouring.
9. An adjoining foundation pit confined soil self-stabilizing support structure according to claim 1, wherein said anchor is threadedly connected to said anchor rod.
10. A self-stabilizing type supporting system for the soil body adjacent to the limited foundation pit is composed of
The parallel foundation pit comprises a first foundation pit and a second foundation pit;
the confined soil self-stabilizing support structure of any one of claims 1 to 9 adjacent an excavation, the confined soil being disposed between the first excavation and the second excavation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021203224.XU CN213417830U (en) | 2020-06-24 | 2020-06-24 | Self-stabilizing type supporting structure and system for adjacent foundation pit limited soil body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021203224.XU CN213417830U (en) | 2020-06-24 | 2020-06-24 | Self-stabilizing type supporting structure and system for adjacent foundation pit limited soil body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213417830U true CN213417830U (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021203224.XU Expired - Fee Related CN213417830U (en) | 2020-06-24 | 2020-06-24 | Self-stabilizing type supporting structure and system for adjacent foundation pit limited soil body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213417830U (en) |
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2020
- 2020-06-24 CN CN202021203224.XU patent/CN213417830U/en not_active Expired - Fee Related
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Granted publication date: 20210611 |