CN216999746U - Foundation pit supporting structure - Google Patents
Foundation pit supporting structure Download PDFInfo
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- CN216999746U CN216999746U CN202220249604.XU CN202220249604U CN216999746U CN 216999746 U CN216999746 U CN 216999746U CN 202220249604 U CN202220249604 U CN 202220249604U CN 216999746 U CN216999746 U CN 216999746U
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Abstract
The application discloses a foundation ditch supporting construction includes: support piles are arranged on the side wall of the foundation pit at intervals; soil filled between the support piles; the flexible supporting surface layer structure is arranged on one side of the supporting pile and the soil body; one end of the net hanging steel bar penetrates through the flexible supporting surface layer structure and is inserted into the supporting pile; one end of the friction nail penetrates through the flexible supporting surface layer structure and is inserted into the soil body; and the steel bar anchorage device is fixedly connected with the net hanging steel bars and the other end of the friction nail in an anchoring manner. The flexible supporting surface layer structure is connected with the row pile supporting system through mechanical fixing measures, and the purpose of protecting soil bodies among piles similar to the mesh-hung sprayed concrete can be achieved; and the foundation pit supporting structure of this application still has advantages such as green, energy saving and consumption reduction and construction are rapid when reducing shotcrete and use.
Description
Technical Field
The application relates to foundation ditch construction engineering technical field especially relates to a foundation ditch supporting construction.
Background
In order to ensure the safety of underground engineering construction and the surrounding environment of the foundation pit, special supporting, retaining, reinforcing and protecting measures are required to be adopted for the side wall of the foundation pit. The row pile support such as the cast-in-place concrete pile is a common foundation pit support mode, and the soil body between adjacent support piles is protected by adopting a sprayed concrete surface layer with a built-in reinforcing mesh, so that the functions of preventing rainwater and enhancing the stability of the surface layer of the soil body are mainly achieved.
However, the protection mode of the suspended net sprayed concrete needs to use a large amount of high-energy-consumption and high-pollution materials such as gravels and cement, the dust is large in the construction process, and the maintenance of the sprayed concrete consumes a lot of time.
SUMMERY OF THE UTILITY MODEL
The application provides a foundation pit supporting structure to solve the loaded down with trivial details and power consumption problem of current foundation pit protective structure construction.
The technical scheme adopted by the application is as follows:
a foundation pit supporting structure comprising:
support piles are arranged on the side wall of the foundation pit at intervals;
soil filled between the support piles;
the flexible supporting surface layer structure is arranged on one side of the supporting pile and the soil body;
one end of the net hanging steel bar penetrates through the flexible supporting surface layer structure and is inserted into the supporting pile;
one end of the friction nail penetrates through the flexible supporting surface layer structure and is inserted into the soil body;
and the steel bar anchorage device is connected with the mesh hanging steel bars and the other end of the friction nail in an anchoring manner.
Further, the flexible supporting surface layer structure sequentially comprises a flexible protective layer, a binding layer made of geotextile and a reinforcing construction layer, wherein the flexible protective layer is close to one side of the supporting pile.
Further, the reinforcing structure layer comprises a reinforcing mesh layer formed by arranging reinforcing steel bars or steel wire ropes.
Furthermore, one end of the net hanging reinforcing steel bar penetrates through the meshes of the reinforcing steel bar net layer, the binding layer and the flexible protective layer in sequence and is inserted into the supporting pile, and the other end of the net hanging reinforcing steel bar and the net knot of the reinforcing steel bar net layer are connected in an anchoring mode through the reinforcing steel bar anchorage device.
Furthermore, one end of the friction nail penetrates through the meshes of the reinforced mesh layer, the binding layer and the flexible protective layer in sequence and is inserted into the soil body, and the other end of the friction nail is connected with the net knots of the reinforced mesh layer in an anchoring manner through the reinforced anchor.
Furthermore, the steel bar anchorage device adopts a fixing nut, and a gasket is arranged between the fixing nut and the net knot of the steel bar net layer.
Furthermore, the net hanging reinforcing steel bars and the friction nails are arranged in a quincunx shape.
Furthermore, the top of the support pile is also provided with a crown beam, and the support pile is connected through the crown beam.
The technical scheme of the application has the following beneficial effects:
the application provides a foundation pit supporting structure that flexible support surface course framework and perpendicular fender pile combined together. The flexible supporting surface layer structure is a novel environment-friendly foundation pit supporting surface layer structure, consists of a flexible protective layer, a binding layer and a reinforcing structure layer, and has certain seepage-proofing and fireproof performances and better tensile strength. The flexible supporting surface layer structure is connected with a row pile supporting system through a mechanical fixing measure, so that the purpose of protecting soil bodies among piles similar to the mesh-hanging concrete spraying can be achieved; and the foundation pit supporting structure of this application still has advantages such as green, energy saving and consumption reduction and construction are rapid when reducing shotcrete and use.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic horizontal sectional view of a foundation pit supporting structure provided in an embodiment of the present application;
FIG. 2 is a schematic sectional view taken along line B-B of FIG. 1;
FIG. 3 is a schematic sectional view taken along line A-A of FIG. 1;
illustration of the drawings:
wherein, 1-supporting piles; 2-a flexible protective layer; 3-a constraining layer; 4-a reinforcing structural layer; 5-hanging net steel bars; 6-friction nails; 7-a steel bar anchorage; 8-crown beam.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally 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 application can be understood in a specific case by those of ordinary skill in the art.
Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or device that comprises a list of elements is not necessarily limited to those elements explicitly listed, but may include other elements not expressly listed or inherent to such product or device.
Referring to fig. 1, a schematic horizontal cross-sectional view of a foundation pit supporting structure provided in an embodiment of the present application; FIG. 2 is a schematic sectional view taken along line B-B of FIG. 1; fig. 3 is a schematic sectional view taken along line a-a of fig. 1.
The application provides a pair of foundation ditch supporting construction includes: the foundation pit supporting structure comprises supporting piles 1 arranged on the side wall of a foundation pit (particularly on the inner side of the foundation pit) at intervals, a soil body filled between the supporting piles 1, a flexible supporting surface layer structure arranged on one side of the supporting piles 1 and the soil body, a net hanging reinforcing steel bar 5 with one end penetrating through the flexible supporting surface layer structure and inserted into the supporting piles 1, a friction nail 6 with one end penetrating through the flexible supporting surface layer structure and inserted into the soil body, and a reinforcing steel anchor 7 anchored and connected with the net hanging reinforcing steel bar 5 and the other end of the friction nail 6. Wherein, the mesh hanging steel bars 5 and the friction nails 6 are arranged in a quincunx shape.
The flexible supporting surface layer structure provided by the embodiment sequentially comprises a flexible protective layer 2, a binding layer 3 made of geotextile and a reinforcing structural layer 4, wherein the flexible protective layer 2 is close to one side of a supporting pile 1.
Specifically, the flexible protective layer 2 in the flexible supporting surface layer structure is a PVC plastic-coated cloth layer, and has the performances of water resistance, fire resistance and the like.
The binding layer 3 in the flexible supporting surface layer structure is formed by net gluten formed by materials such as geogrid, fiber cloth (one type of geotextile) and the like, and is formed by weaving high-strength II-level carbon fiber cloth in a transverse and longitudinal overlapping mode, the strip width of the fiber cloth is 33mm, the distance between adjacent fiber strips is 250mm when weaving, the fiber cloth is tightly attached to and covers the flexible protective layer 2 in a pressing mode, and the binding layer plays a role in restraining and stabilizing the flexible supporting surface layer structure.
The reinforcing structure layer 4 in the flexible supporting surface layer structure comprises a reinforcing mesh layer formed by transversely and obliquely arranging reinforcing steel bars or steel wire ropes in a staggered manner, wherein the reinforcing steel bars adopt HRB 400-grade reinforcing steel bars, the diameter of the reinforcing steel bars is 14-20 mm, and the distance between every two adjacent reinforcing steel bars is 1000-1500 mm.
Further, in order to stabilize the reinforcement to flexible support surface course structure, this application still includes following setting: one end of the net hanging reinforcing steel bar 5 sequentially penetrates through the meshes, the binding layer 3 and the flexible layer of the reinforcing steel bar net layer and is inserted into the support pile 1, and the other end of the net hanging reinforcing steel bar 5 is connected with the net knots of the reinforcing steel bar net layer in an anchoring mode through a reinforcing steel bar anchorage device 7. The mesh hanging steel bars 55 are HRB400 steel bars with the diameter of 18mm and the length of 450 mm.
One end of the friction nail 6 sequentially penetrates through meshes of the steel bar net layer, the binding layer 3 and the flexible protection layer 2 and is inserted into a soil body, and the other end of the friction nail 6 is connected with a net knot of the steel bar net layer in an anchoring mode through a steel bar anchorage device 7. The friction nails 6 adopt HRB400 steel bars with the diameter of 20mm and the length of 1000 mm.
The steel bar anchorage device 7 adopts a fixing nut, and a gasket is arranged between the fixing nut and the net knots of the steel bar net layer. Of course, the friction nails 6 and the net hanging steel bars can be fixedly connected by adopting buckles or other mechanical connections.
In order to connect all the support piles 1 together and prevent collapse of the top edge of the foundation pit, the top of each support pile 1 is provided with a crown beam 8, and the crown beam 8 is made of C30 concrete and has the size of 800-800 mm.
The application provides a flexible supporting surface layer frame structure and vertical support pile combined foundation pit supporting structure. The flexible supporting surface layer structure is a novel environment-friendly foundation pit supporting surface layer structure, consists of a flexible protective layer, a binding layer and a reinforcing structure layer, and has certain seepage-proofing and fireproof performances and better tensile strength. The flexible supporting surface layer structure is connected with a row pile supporting system through mechanical fixing measures, so that the purpose of protecting soil bodies among piles similar to the hanging net sprayed concrete can be achieved; and the foundation pit supporting structure of this application still has advantages such as green, energy saving and consumption reduction and construction are rapid when reducing shotcrete and use.
The detailed description provided above is only a few examples under the general concept of the present application, and does not constitute a limitation to the scope of the present application. Any other embodiments extended according to the scheme of the present application without inventive efforts will be within the scope of protection of the present application for a person skilled in the art.
Claims (8)
1. A foundation pit supporting structure, comprising:
support piles are arranged on the side wall of the foundation pit at intervals;
soil mass filled between the support piles;
the flexible supporting surface layer structure is arranged on one side of the supporting pile and the soil body;
one end of the net hanging steel bar penetrates through the flexible supporting surface layer structure and is inserted into the supporting pile;
one end of the friction nail penetrates through the flexible supporting surface layer structure and is inserted into the soil body;
and the steel bar anchorage device is fixedly connected with the net hanging steel bars and the other end of the friction nail in an anchoring manner.
2. The foundation pit supporting structure according to claim 1, wherein the flexible supporting surface layer structure comprises a flexible protective layer, a tie layer made of geotextile, and a reinforcing structural layer in this order, wherein the flexible protective layer is adjacent to the side of the support pile.
3. A foundation pit supporting construction according to claim 2, wherein the reinforcing structure layer comprises a mesh layer of reinforcing bars arranged from steel bars or wire ropes.
4. The foundation pit supporting structure according to claim 3, wherein one end of the mesh-hanging steel bar penetrates through the mesh of the steel bar net layer, the binding layer and the flexible protective layer in sequence and is inserted into the supporting pile, and the other end of the mesh-hanging steel bar and the net knot of the steel bar net layer are connected in an anchoring manner through the steel bar anchorage device.
5. The foundation pit supporting structure according to claim 3, wherein one end of the friction nail penetrates through the mesh of the reinforcement mesh layer, the binding layer and the flexible protective layer in sequence and is inserted into the soil body, and the other end of the friction nail is in anchoring connection with the net knots of the reinforcement mesh layer through the steel anchor.
6. The foundation pit supporting structure according to claim 4 or 5, wherein the reinforcing steel anchors are fixing nuts, and gaskets are further arranged between the fixing nuts and the net knots of the reinforcing steel net layers.
7. The foundation pit supporting structure of claim 1, wherein the mesh reinforcement bars and the friction nails are arranged in a quincunx pattern.
8. The foundation pit supporting structure according to claim 1, wherein a crown beam is further provided at the top of the supporting pile, and the supporting pile is connected by the crown beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220249604.XU CN216999746U (en) | 2022-02-07 | 2022-02-07 | Foundation pit supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220249604.XU CN216999746U (en) | 2022-02-07 | 2022-02-07 | Foundation pit supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216999746U true CN216999746U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220249604.XU Active CN216999746U (en) | 2022-02-07 | 2022-02-07 | Foundation pit supporting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216999746U (en) |
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2022
- 2022-02-07 CN CN202220249604.XU patent/CN216999746U/en active Active
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