Deep foundation pit supporting retaining wall structure
By setting up a chamber in a deep foundation pit and filling a double-layer concrete layer, combining the fixed structure of the ground pile and support rod, the problem of insufficient support stability and firmness of the foundation pit is solved, the construction space is increased, and the structure is improved overall stability.
Patent Information
- Application Number
- CN202420855107.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing foundation pit support structure is insufficient in stability and firmness when affected by geological movement or external forces, and the support poles on the inner side of the support occupy construction space, affecting subsequent construction.
A deep foundation pit support retaining wall structure is designed, and the first and second concrete layers are filled with the arrangement of a chamber and a pouring port in the foundation pit, and the ground piles, baffles and support rods are connected through multiple pipes to form Double-layer fixed structure reduces the use of inner support structures.
This structure stabilizes the baffle with a double-layer fixed structure to avoid inclination or collapse caused by displacement of the soil layer in the foundation pit, and does not require an inner support structure, which increases the spatial range of movement of the foundation pit.
Smart Images
Figure CN222456116U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of foundation pit support, in particular to a deep foundation pit support retaining wall structure. Background Art
[0002] The foundation pit support project is a temporary project, and the designed safety reserve can be relatively small, but it is related to the regionality. The geological conditions in different regions have different characteristics. The foundation pit support project is a subject that intersects geotechnical engineering, structural engineering and construction technology. It is a systematic project with the interaction of multiple complex factors. It is a comprehensive technical subject that has yet to be developed in theory. The more commonly used method is to cast a cement soil gravity retaining wall inside the foundation pit to support and protect the foundation pit.
[0003] The foundation pit support mechanism in the existing technical solution has the following deficiencies that need to be improved. First, due to geological movement or external force, the foundation pit will undergo a certain displacement, thereby affecting the stability of the support. Second, in order to improve the firmness between the support and the foundation pit, support rods are usually provided on both sides of the support. In this way, the support rods located on the inner side of the foundation pit are bound to affect the subsequent construction, that is, they occupy the construction space. Utility Model Content
[0004] 1. Technical issues to be resolved
[0005] In view of the deficiencies in the prior art, the utility model provides a deep foundation pit support retaining wall structure, which solves the problems of insufficient stability and firmness of the prior foundation pit support.
[0006] (II) Technical solution
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a deep foundation pit support retaining wall structure, comprising a foundation pit, a drainage ditch is provided at the bottom of the foundation pit, and a first concrete layer is paved on the slope surface of the foundation pit.
[0008] A chamber and a pouring port are arranged inside the foundation pit.
[0009] The second concrete layer is poured into the cavity through the pouring port.
[0010] The first concrete layer is connected to the second concrete layer through a plurality of pipes, ground piles are arranged in the pipes, and the ends of the ground piles are embedded in the second concrete layer.
[0011] The baffle plate has its end passing through the first concrete layer and embedded in the second concrete layer. A plurality of support rods are installed on one side of the baffle plate close to the foundation pit slope, and the ends of the support rods are fixed to the ground piles by fixing bolts.
[0012] The area between the baffle and the foundation pit slope is filled with backfill soil.
[0013] A drain pipe is arranged at the bottom of the baffle.
[0014] As further preferred, the bottom of the first concrete layer extends to the top of the drainage ditch.
[0015] As a further preference, the top of the pipeline is separated from the backfill soil by a waterproof floor.
[0016] As further preferred, the side portions of the plurality of support rods are fixed to the surface of the first concrete layer via reinforcement rods.
[0017] As further preferred, the first concrete layer and the second concrete layer are arranged in parallel.
[0018] (III) Beneficial effects
[0019] The utility model provides a deep foundation pit support retaining wall structure. It has the following beneficial effects:
[0020] The deep foundation pit support retaining wall structure is achieved by evacuating the interior of the foundation pit and filling it with a layer of concrete. The concrete layer and the outer concrete layer form a double-layer fixed structure, and the baffle is anchored by the double-layer fixed structure. In this way, even if the soil layer inside the foundation pit is displaced to a certain extent, the double-layer fixed structure can stably fix the column baffle and will not cause tilting or collapse accidents. Furthermore, due to the strong stability of the double-layer fixed structure, there is no need to equip the inner side of the baffle with a supporting structure, thereby increasing the spatial activity range of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the structure of the utility model;
[0022] Figure 2 This is an enlarged view of the structure at point A of the utility model.
[0023] In the figure: 1. foundation pit; 2. drainage ditch; 3. chamber; 4. pouring port; 5. second concrete layer; 6. first concrete layer; 7. pipeline; 8. ground piles; 9. baffle; 10. support rod; 11. fixing bolt; 12. backfill soil; 13. drain pipe; 14. reinforcement rod; 15. waterproof floor. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] like Figure 1 As shown, the utility model provides a technical solution: a deep foundation pit supporting retaining wall structure, characterized in that: it includes a foundation pit 1, a drainage ditch 2 is opened at the bottom of the foundation pit 1, and the slope surface of the foundation pit 1 is paved with a first concrete layer 6, and the bottom of the first concrete layer 6 extends to the top of the drainage ditch 2, that is, the drainage ditch 2 is also treated with cement hardening.
[0026] like Figure 1 As shown, a chamber 3 and a pouring port 4 are provided inside the foundation pit 1 . It should be noted that the diameter of the pouring port 4 is smaller than that of the chamber 3 .
[0027] like Figure 1 As shown, the second concrete layer 5 is poured into the chamber 3 through the pouring port 4 , and the first concrete layer 6 is arranged parallel to the second concrete layer 5 .
[0028] like Figure 2 As shown, the first concrete layer 6 and the second concrete layer 5 are connected by a plurality of pipes 7, and ground piles 8 are arranged in the pipes 7. The pipes 7 can well protect the ground piles 8. The ends of the ground piles 8 are embedded in the second concrete layer 5. The tops of the pipes 7 are separated from the backfill soil 12 by a waterproof floor 15, and the waterproof floor 15 can protect the ground piles 8 from rust.
[0029] like Figure 1 As shown, the baffle 9, the end of the baffle 9 passes through the first concrete layer 6 and is embedded in the second concrete layer 5, and a plurality of support rods 10 are installed on the side of the baffle 9 close to the slope of the foundation pit 1, the ends of the support rods 10 are fixed to the ground piles 8 by fixing bolts 11, and the sides of the support rods 10 are fixed to the surface of the first concrete layer 6 by reinforcing rods 14. The stability of the baffle 9 is further enhanced by the arrangement of the reinforcing rods 14.
[0030] like Figure 1 As shown, the area between the baffle 9 and the slope of the foundation pit 1 is filled with backfill soil 12.
[0031] like Figure 1 As shown, a drainage pipe 13 is provided at the bottom of the baffle 9 , and the water in the backfill soil 12 area is discharged into the drainage ditch 2 through the drainage pipe 13 .
[0032] Meanwhile, the contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field.
[0033] The general construction process of the support is to first dig a chamber 3 and a pouring port 4 on both sides of the foundation pit 1, then insert the pipe 7 obliquely into the chamber 3 from the slope position of the foundation pit 1 (specifically, the ground pile 8 extends into the chamber 3), and then insert the baffle 9 into the foundation pit 1. Similarly, the end of the baffle 9 is inserted into the chamber 3.
[0034] Afterwards, concrete is poured into the chamber 3 through the pouring port 4 to form a second concrete layer 5 , and the ground piles 8 and the baffle 9 are anchored through the second concrete layer 5 .
[0035] Afterwards, a first concrete layer 6 is laid on the slope surface of the foundation pit 1 to fix the pipeline 7 and the baffle 9. Finally, the support 10 is fixed to the pile 8 and the baffle 9 respectively, so as to lock the baffle 9 in the lateral direction.
[0036] Then, the waterproof floor 15 is filled at the pipe opening of the pipe 7 to seal it, and finally the backfill soil 12 is poured into the area between the slope and the baffle 9.
[0037] To summarize, the deep foundation pit support retaining wall structure is achieved by evacuating the interior of the foundation pit and filling it with a layer of concrete. The concrete layer and the external concrete layer form a double-layer fixed structure, and the baffle is anchored by the double-layer fixed structure. In this way, even if the soil layer inside the foundation pit is displaced to a certain extent, the double-layer fixed structure can stably fix the column baffle, and no tilting or collapse accidents will occur. Furthermore, due to the strong stability of the double-layer fixed structure, there is no need to equip the inner side of the baffle with a supporting structure, thereby increasing the spatial activity range of the foundation pit.
[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A deep foundation pit support retaining wall structure, characterized in that: It comprises a foundation pit (1), a drainage ditch (2) is provided at the bottom of the foundation pit (1), and a first concrete layer (6) is laid on the slope surface of the foundation pit (1); A chamber (3) and a pouring port (4) are provided inside the foundation pit (1); A second concrete layer (5), the second concrete layer (5) is poured into the chamber (3) through the pouring port (4); The first concrete layer (6) and the second concrete layer (5) are connected via a plurality of pipes (7), ground piles (8) are arranged in the pipes (7), and the ends of the ground piles (8) are embedded in the second concrete layer (5); A baffle (9), the end of which passes through the first concrete layer (6) and is embedded in the second concrete layer (5), a plurality of support rods (10) are installed on a side of the baffle (9) close to the slope of the foundation pit (1), and the ends of the support rods (10) are fixed to the ground piles (8) by fixing bolts (11); The area between the baffle (9) and the slope of the foundation pit (1) is filled with backfill soil (12); A drain pipe (13) is provided at the bottom of the baffle (9).
2. A deep foundation pit retaining wall structure according to claim 1, characterized in that: The bottom of the first concrete layer (6) extends to the top of the drainage ditch (2).
3. A deep foundation pit retaining wall structure according to claim 1, characterized in that: The top of the pipeline (7) is separated from the backfill soil (12) by a waterproof floor (15).
4. A deep foundation pit support retaining wall structure according to claim 1, characterized in that: The side portions of the plurality of support rods (10) are fixed to the surface of the first concrete layer (6) via reinforcing rods (14).
5. The deep foundation pit support retaining wall structure according to claim 1, characterized in that: The first concrete layer (6) is arranged in parallel with the second concrete layer (5).