A high-strength support device and construction method for self-drainage in water-rich strata

Abstract

This invention discloses a high-strength support device and construction method for self-drainage in water-rich strata. The device includes a shear wall, a drainage mechanism (multiple drainage mechanisms installed on the shear wall), a water-blocking mechanism located outside the shear wall, and a water storage mechanism located between the shear wall and the water-blocking mechanism and connected to the drainage mechanism. The drainage mechanism guides water from the soil in the excavated pit into the water storage mechanism. This high-strength support device and construction method for self-drainage in water-rich strata achieves self-drainage while simultaneously supporting the pit. Furthermore, it coordinates with the pumping process to achieve self-drainage, solving the problem of existing technologies that typically require first constructing the pit support structure, then the water-stop curtain, and finally wellpoint dewatering to drain groundwater before excavation. This method is cumbersome, inefficient, and hinders project progress.

Description

Technical Field

[0001] This invention relates to the field of foundation pit construction technology, specifically to a high-strength support device and construction method for self-drainage in water-rich strata. Background Technology

[0002] Currently, since the beginning of the 21st century, with the rapid development of urbanization in my country, the urban population has grown rapidly, and the urban construction land has also expanded rapidly, leading to urban traffic congestion and increasingly scarce construction land resources, which has become a major factor restricting the sustainable development of cities and the urbanization process.

[0003] To alleviate the problem of insufficient urban construction space, people have shifted the focus of development planning from above ground to underground. The rational development of underground space is an effective way to solve the problems of overcrowded urban populations and traffic congestion on the ground. In the current technology, in the process of excavation and support construction of foundation pits rich in groundwater, it is generally necessary to first construct the foundation pit maintenance structure, then construct the water-stop curtain, and then carry out well point dewatering during further foundation pit excavation to drain the groundwater before excavating the soil. This construction method is cumbersome, inefficient, and affects the progress of the project. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength support device and construction method for self-drainage in water-rich strata, solving the problems of cumbersome procedures, low efficiency, and impact on project progress in existing technologies.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-strength support device for self-drainage in water-rich strata, comprising: Shear wall; Drainage mechanisms, multiple of which are installed on shear walls; A water-retaining mechanism, which is installed on the outside of the shear wall, and A water storage mechanism is installed between the shear wall and the water-retaining mechanism and connected to the drainage mechanism. The drainage mechanism guides the water in the soil of the excavated pit into the water storage mechanism.

[0006] Preferably, the shear wall is enclosed in a rectangular shape.

[0007] Preferably, the drainage mechanism includes drainage pipes, and a plurality of drainage pipes are arranged at equal intervals on the bottom periphery of the shear wall.

[0008] Preferably, the water-blocking mechanism includes: A corner prefabricated component, wherein each of its two end faces is fixedly connected to a plug-in protrusion, and the number of such corner prefabricated components is four. A precast wall component is provided, with multiple precast wall components disposed between two adjacent corner precast components. Two limiting protrusions are fixedly connected to the two end faces of each precast wall component. The two limiting protrusions on the same end face of the precast wall component form a limiting groove. The two limiting grooves between two adjacent precast wall components are spliced ​​together to form a limiting cavity, which is filled with concrete. The multiple precast wall components between two adjacent corner precast components are spliced ​​together to form a wall. The limiting groove on the precast wall component at the end of the wall is inserted into the insertion protrusion on the corner precast component.

[0009] Preferably, the water storage mechanism includes a drainage chamber, which is disposed between the shear wall and the precast wall component, and the drainage chamber is connected to the drainage end of the drainage pipe.

[0010] Preferably, it also includes a support mechanism, with multiple support mechanisms equally spaced within the drainage cavity. Each support mechanism includes two support walls, which are arranged in parallel and located between the shear wall and the precast wall component. A filling cavity is formed between the two support walls, and the filling cavity is filled with concrete. Multiple support steel columns are installed through the support walls, and the two ends of the support steel columns are fixedly connected to the shear wall and the precast wall component, respectively.

[0011] A construction method for high-strength support for self-drainage in water-rich strata, employing the aforementioned high-strength support device for self-drainage in water-rich strata, includes the following steps: S1: Dig a trench in the soil around the excavation pit to be excavated and build a water-blocking mechanism; S2: Construct shear walls on the outer wall of the soil inside the excavation pit and install several drainage pipes; S3: Excavate the soil between the shear wall and the water-retaining mechanism to form a drainage cavity; S4: Establish lateral supports within the drainage cavity to complete the overall support and then carry out drainage; S5: Excavate the foundation pit after the soil in the pit has been drained.

[0012] Preferably, in step S1, a trench is dug on the soil outside the foundation pit to be excavated, corner prefabricated components and wall prefabricated components are placed in the trench in sequence, and a steel cage is placed in the limiting cavity and filled with concrete.

[0013] Preferably, the distance between the shear wall and the water-blocking mechanism in step S3 is 300mm-500mm.

[0014] Preferably, in step S4, several supporting steel columns are first installed, mold plates are assembled and constructed on the outside of two adjacent rows of supporting steel columns to build supporting walls, and steel cages are placed and filled with concrete in the two adjacent supporting walls.

[0015] As can be seen from the above technical solution, the present invention has the following beneficial effects: This invention relates to a high-strength support device and construction method for self-drainage in water-rich strata. By installing shear walls, it maintains the soil within the excavation pit and reinforces the surrounding soil, preventing pit collapse. A drainage mechanism directs water from the soil within the pit into a storage system. This drainage mechanism, combined with water-blocking and support mechanisms, achieves self-drainage while supporting the pit. The method addresses the problems of existing technologies in groundwater-rich pit excavation and support, which typically require first constructing the pit support structure, then the water-stop curtain, and finally wellpoint dewatering to drain the groundwater before excavation. This cumbersome and inefficient construction method hinders project progress. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the shear wall structure of the present invention; Figure 3 This is a schematic diagram of the corner prefabricated component structure of the present invention; Figure 4 This is a schematic diagram of the prefabricated wall component structure of the present invention; Figure 5 This is a schematic diagram of the supporting wall structure of the present invention; Figure 6 This is a schematic diagram of the method flow of the present invention.

[0017] In the diagram: 1. Shear wall; 2. Drainage mechanism; 21. Drainage pipe; 3. Water-blocking mechanism; 31. Corner precast component; 32. Insertion protrusion; 33. Wall precast component; 34. Limiting protrusion; 35. Limiting groove; 36. Limiting cavity; 4. Water storage mechanism; 41. Drainage cavity; 5. Support mechanism; 51. Supporting wall; 52. Filling cavity; 53. Supporting steel column. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1As shown, a high-strength support device for self-drainage in water-rich strata includes a shear wall 1, a drainage mechanism 2, a water-retaining mechanism 3, and a water storage mechanism 4. The shear wall 1 is set on the outer layer of the excavation pit. Multiple drainage mechanisms 2 are set on the shear wall 1. The water-retaining mechanism 3 is set on the outside of the shear wall 1. The water storage mechanism 4 is set between the shear wall 1 and the water-retaining mechanism 3 and connected to the drainage mechanism 2. The drainage mechanism 2 guides the water in the soil of the excavation pit to the water storage mechanism 4. By setting up the shear wall 1, the soil in the excavation pit is maintained and the surrounding soil is reinforced to prevent the pit from collapsing. The drainage mechanism 2 guides the water in the soil of the excavation pit to the water storage mechanism 4. The drainage mechanism 2 can remove water from the soil of the excavation pit. Together with the water-retaining mechanism 3 and the support mechanism 5, it can achieve the effect of self-drainage while supporting the pit. At the same time, it can achieve the self-drainage function by coordinating with the pumping process.

[0020] like Figures 1-5 As shown, the shear wall 1 is enclosed in a rectangular shape. The drainage mechanism 2 includes drainage pipes 21, and multiple drainage pipes 21 are equally spaced on the circumferential surface of the bottom of the shear wall 1. The water-blocking mechanism 3 includes corner prefabricated parts 31, insertion protrusions 32, wall prefabricated parts 33, limiting protrusions 34, limiting grooves 35, and limiting cavities 36. Each of the two end faces of the corner prefabricated parts 31 is fixedly connected to an insertion protrusion 32. There are four corner prefabricated parts 31. Multiple wall prefabricated parts 33 are arranged between two adjacent corner prefabricated parts 31. The two end faces of the wall prefabricated parts 33 are respectively fixed... The fixed connection has two limiting protrusions 34. The two limiting protrusions 34 on the same end face of the wall prefabricated component 33 form a limiting groove 35. The limiting cavity 36 is formed by splicing two limiting grooves 35 between two adjacent wall prefabricated components 33. The inside of the limiting cavity 36 is filled with concrete. Multiple wall prefabricated components 33 between two adjacent corner prefabricated components 31 are spliced ​​to form a wall. The limiting groove 35 on the wall prefabricated component 33 at the end of the wall is inserted into the insertion protrusion 32 on the corner prefabricated component 31. The water-blocking mechanism 3 is also rectangular. The four corner prefabricated components 31 are located at the four corners respectively.

[0021] The precast wall components 33 and corner components 31 can be spliced ​​and fixed, thereby enabling the rapid construction of the water-blocking mechanism 3 and greatly improving work efficiency. By placing a steel cage into the limiting cavity 36 and filling it with concrete, the connection between two horizontally adjacent precast wall components 33 can be achieved, thereby enhancing the integrity and waterproofness of the water-blocking mechanism 3.

[0022] like Figures 1-5As shown, the water storage mechanism 4 includes a drainage chamber 41. A drainage chamber 41 is provided between the shear wall 1 and the precast wall component 33. The drainage end of the drainage pipe 21 is connected to the drainage chamber 41. The device also includes a support mechanism 5. Multiple support mechanisms 5 are provided in the drainage chamber 41 at equal intervals. The support mechanism 5 includes two support walls 51. Two support walls 51 are arranged parallel between the shear wall 1 and the precast wall component 33. A filling cavity 52 is formed between the two support walls 51. The filling cavity 52 is filled with concrete. Multiple support steel columns 53 are installed through the support walls 51. The two ends of the support steel columns 53 are fixedly connected to the shear wall 1 and the precast wall component 33, respectively.

[0023] By filling the cavity 52 between the two supporting walls 51 with concrete, the shear wall 1 and the water-retaining mechanism 3 can be fully supported, and the support effect can be improved. Placing a steel cage between the filling concrete can enhance the overall integrity and increase the strength. The supporting steel column 53 can enhance the support effect of the shear wall 1 and the water-retaining mechanism 3, and also facilitate the construction of the supporting wall 51.

[0024] like Figure 6 As shown, a construction method for high-strength support for self-drainage in water-rich strata is also provided, employing the aforementioned high-strength support device for self-drainage in water-rich strata. The construction method includes the following steps: S1: Dig a trench in the soil around the excavation pit to be excavated and build a water-blocking mechanism; S2: Construct shear walls on the outer wall of the soil inside the excavation pit and install several drainage pipes; S3: Excavate the soil between the shear wall and the water-retaining mechanism to form a drainage cavity; S4: Establish lateral supports within the drainage cavity to complete the overall support and then carry out drainage; S5: Excavate the foundation pit after the soil in the pit has been drained.

[0025] In step S1, a trench is dug in the soil outside the excavation pit, and corner precast components and wall precast components are placed in the trench in sequence. A reinforcing cage is placed in the limiting cavity and filled with concrete to establish the water-blocking mechanism. The wall precast components have cavities, which can reduce the overall weight of the wall precast components and facilitate the establishment of the water-blocking mechanism. In step S3, the distance between the shear wall and the water-blocking mechanism is 300mm-500mm. In step S4, several supporting steel columns are first installed, and mold plates are assembled on the outside of two adjacent rows of supporting steel columns and construction is carried out to establish the supporting wall. A reinforcing cage is placed in the two adjacent supporting walls and filled with concrete.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction method for high-strength support for self-drainage in water-rich strata, characterized in that, A high-strength support device for self-drainage in water-rich strata is adopted, the high-strength support device for self-drainage in water-rich strata includes: Shear wall (1); Drainage mechanism (2), multiple drainage mechanisms (2) are installed on shear wall (1); Water-blocking mechanism (3), which is located on the outside of shear wall (1), and Water storage mechanism (4) is set between shear wall (1) and water retaining mechanism (3) and connected to drainage mechanism (2), which guides water in the soil in the excavation pit into water storage mechanism (4); The construction method includes the following steps: S1: Dig a trench in the soil around the excavation pit to be excavated and build a water-blocking mechanism; S2: Construct shear walls on the outer wall of the soil inside the excavation pit and install several drainage pipes; S3: Excavate the soil between the shear wall and the water-retaining mechanism to form a drainage cavity; S4: Establish lateral supports within the drainage cavity to complete the overall support and then carry out drainage; S5: Excavate the foundation pit after the soil in the pit has been drained.

2. The construction method for high-strength support for self-drainage in water-rich strata according to claim 1, characterized in that: The shear wall (1) is enclosed and surrounded in a rectangular shape.

3. The construction method for high-strength support for self-drainage in water-rich strata according to claim 1, characterized in that: The drainage mechanism (2) includes drainage pipes (21), and a plurality of drainage pipes (21) are arranged at equal intervals on the bottom periphery of the shear wall (1).

4. The construction method for high-strength support for self-drainage in water-rich strata according to claim 3, characterized in that: The water-blocking mechanism (3) includes: A corner prefabricated component (31) has a plug-in protrusion (32) fixedly connected to the middle of each of its two end faces. The number of corner prefabricated components (31) is four. A precast wall component (33) is provided between two adjacent corner precast components (31). Two limiting protrusions (34) are fixedly connected to the two end faces of the precast wall component (33). The two limiting protrusions (34) on the same end face of the precast wall component (33) form a limiting groove (35). The two limiting grooves (35) between two adjacent precast wall components (33) are spliced ​​to form a limiting cavity (36). The limiting cavity (36) is filled with concrete. The multiple precast wall components (33) between two adjacent corner precast components (31) are spliced ​​to form a wall. The limiting groove (35) on the precast wall component (33) at the end of the wall is inserted into the insertion protrusion (32) on the corner precast component (31).

5. The construction method for high-strength support for self-drainage in water-rich strata according to claim 4, characterized in that: The water storage mechanism (4) includes a drainage chamber (41), which is located between the shear wall (1) and the precast wall component (33). The drainage chamber (41) is connected to the drainage end of the drainage pipe (21).

6. The construction method for high-strength support for self-drainage in water-rich strata according to claim 5, characterized in that, It also includes a support mechanism (5), and multiple support mechanisms (5) are equally spaced in the drainage cavity (41). Each support mechanism (5) includes two support walls (51), which are arranged in parallel and located between the shear wall (1) and the wall prefabricated component (33). A filling cavity (52) is formed between the two support walls (51), and the filling cavity (52) is filled with concrete. Multiple support steel columns (53) are installed through the support wall (51), and the two ends of the support steel columns (53) are fixedly connected to the shear wall (1) and the wall prefabricated component (33) respectively.

7. A construction method for high-strength support for self-drainage in water-rich strata according to claim 4, characterized in that: In step S1, a trench is dug in the soil around the foundation pit to be excavated, and corner prefabricated components and wall prefabricated components are placed in the trench in sequence. A steel cage is then placed in the limiting cavity and filled with concrete.

8. The construction method for high-strength support for self-drainage in water-rich strata according to claim 1, characterized in that: In step S3, the distance between the shear wall and the water-blocking mechanism is 300mm-500mm.

9. A construction method for high-strength support for self-drainage in water-rich strata according to claim 1, characterized in that: In step S4, firstly, several supporting steel columns are installed, then mold plates are assembled and constructed on the outside of two adjacent rows of supporting steel columns to build supporting walls, and then steel cages are placed and filled with concrete inside the two adjacent supporting walls.

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