Soil body protection structure between cast-in-place piles of foundation pit supporting structure

Abstract

The utility model relates to the technical field of foundation pit protection, and discloses a soil body protection structure between foundation pit supporting structure cast-in-place piles, the structure is composed of cast-in-place piles, a protection mechanism and a drainage mechanism, the protection mechanism comprises a fixing steel ring, a reinforcing anchor rod, a front high-strength fiber reinforced composite material plate, a rear high-strength fiber reinforced composite material plate and the like. A three-dimensional protection system is formed, the construction safety of the foundation pit is guaranteed, the labor intensity is reduced, the fiber reinforced composite material is resistant to corrosion, the connecting device is subjected to anti-corrosion treatment, the service life is prolonged, the maintenance cost is reduced, the drainage mechanism comprises reserved drainage holes, permeable pipes and a geotechnical cloth wrapping layer, and the reserved drainage holes are arranged in a quincunx shape and can uniformly drain water and prevent water accumulation; the water permeable pipes reinforce drainage, the geotechnical cloth wrapping layer prevents blocking, the pore water pressure of the soil body can be reduced, the stability of the soil body is enhanced, and compared with a traditional structure, the soil body protection structure is better in protection performance, convenient to construct and high in durability.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit protection technology, specifically a soil protection structure between cast-in-place piles in a foundation pit support structure. Background Technology

[0002] When constructing underground buildings (basements, underground garages, etc.) during building construction, large construction pits are often excavated in advance at the construction site of the underground building. In order to improve the stability of the pit and prevent water, gravel and other debris from falling into the pit, a pit support structure is often installed on the side wall of the pit after excavation.

[0003] According to a patent application published on the internet (authorization announcement number: CN218263909U), "This application relates to the field of foundation pit support technology, specifically disclosing a soil protection structure between cast-in-place piles in a foundation pit support structure. It includes a steel mesh and a concrete layer, and also includes multiple plug-in cylinders. Each plug-in cylinder is equipped with several plug-in rods, one end of which is rotatably mounted on a corresponding plug-in cylinder. Each plug-in cylinder is equipped with an adjustment component for driving the other end of the plug-in rods away from the plug-in cylinder. The plug-in cylinder is also equipped with a connector for hanging the steel mesh on the plug-in cylinder. This application has the effect of making it difficult for the concrete surface layer to detach from the sidewall of the foundation pit."

[0004] Based on the above, the applicant believes the following deficiencies exist:

[0005] The soil protection structure between the cast-in-place piles of the foundation pit support structure has the effect of making it difficult for the concrete surface layer to fall off the side wall of the foundation pit. However, the overall protection of the structure is poor, it is cumbersome to use, and the installation process is time-consuming. At the same time, the overall service life and service cycle cannot be guaranteed, which will affect the construction progress of the foundation pit project. Utility Model Content

[0006] The purpose of this utility model is to provide a soil protection structure between cast-in-place piles in a foundation pit support structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a soil protection structure between cast-in-place piles in a foundation pit support structure, comprising cast-in-place piles, wherein a protective mechanism is provided on the surface of the cast-in-place piles, and a drainage mechanism is provided on the surface of the protective mechanism.

[0008] The protective mechanism includes a fixing steel ring installed on the surface of the cast-in-place pile. Reinforcing anchor rods are installed on the surface of the fixing steel ring. A snap-fit ​​groove is formed at the front end of the inner side of the fixing steel ring, and a front-mounted high-strength fiber-reinforced composite material plate and a rear-mounted high-strength fiber-reinforced composite material plate are installed inside the snap-fit ​​groove. A first fixing seat is welded to the front of the rear-mounted high-strength fiber-reinforced composite material plate, and a second fixing seat is welded to the back of the front-mounted high-strength fiber-reinforced composite material plate. A spacer reinforcing steel strip is welded between the first and second fixing seats. Main reinforcing ribs are fixedly connected to the left and right ends of the back of the rear-mounted high-strength fiber-reinforced composite material plate, and an auxiliary rib is fixedly connected to the center of the bottom end of the back of the rear-mounted high-strength fiber-reinforced composite material plate. The fixing steel ring and reinforcing anchor rods are pre-installed on the surface of the cast-in-place pile. The formed front-mounted high-strength fiber-reinforced composite material plate and the rear-mounted high-strength fiber-reinforced composite material plate are then hoisted together. The material plates are inserted into the snap-fit ​​slots. After installation, the components are fixed with high-strength bolts and put into use. The high-strength combined structure of the front high-strength fiber-reinforced composite material plate, the rear high-strength fiber-reinforced composite material plate, the main reinforcing ribs, and the auxiliary ribs forms a three-dimensional soil protection system. It works in conjunction with the internal first fixing seat, second fixing seat, and spaced reinforcing steel bars to effectively ensure the safety of foundation pit construction. At the same time, the components are prefabricated in the factory, and the on-site construction is mainly assembly-based, which reduces on-site wet work and complex construction processes, greatly shortens the construction cycle, and reduces labor intensity. Fiber-reinforced composite materials have excellent corrosion resistance and good resistance to chemicals such as acids, alkalis, and salts. In the complex underground chemical environment, the service life is much longer than that of traditional steel protection structures. In addition, the special anti-corrosion treatment process used in the connection device further improves the durability of the structure and reduces the later maintenance costs.

[0009] Preferably, the first fixing seat, the second fixing seat, and the spacer reinforcing steel strip are evenly distributed between the front high-strength fiber-reinforced composite material plate and the rear high-strength fiber-reinforced composite material plate.

[0010] Preferably, the post-installed high-strength fiber-reinforced composite material plate, the main reinforcing rib, and the auxiliary rib are all integrally formed using a hot-pressing molding process.

[0011] Preferably, the drainage mechanism includes reserved drainage holes, which are formed on the surfaces of the front and rear high-strength fiber-reinforced composite material plates. A permeable pipe is installed inside each reserved drainage hole, and the outer end of the permeable pipe is wrapped with a geotextile layer. The reserved drainage holes are arranged in a quincunx pattern on the surfaces of the front and rear high-strength fiber-reinforced composite material plates. This quincunx pattern ensures uniform water flow and avoids localized water accumulation. This design allows water to penetrate the soil more evenly, improving drainage efficiency and reducing water accumulation caused by poor drainage. The permeable pipe and the geotextile layer are connected by cable ties. The permeable pipe enhances drainage, while the geotextile layer prevents soil particles from entering and clogging the permeable pipe. The drainage system can quickly remove groundwater, reduce pore water pressure in the soil, increase soil shear strength, further enhance soil stability, and reduce the risk of collapse.

[0012] Preferably, the reserved drainage holes are arranged in a quincunx pattern, and the permeable pipe is made of HDPE material.

[0013] Preferably, an external steel mesh is installed on the front side of the front high-strength fiber reinforced composite material plate, and a bottom embedded steel plate is installed on the bottom inner side of both the front and rear high-strength fiber reinforced composite material plates.

[0014] Compared with the prior art, this utility model provides a soil protection structure between cast-in-place piles in a foundation pit support structure, which has the following beneficial effects:

[0015] 1. The soil protection structure between the cast-in-place piles of the foundation pit support structure is equipped with a protective mechanism. Fixed steel rings and reinforcing anchors are pre-installed on the surface of the cast-in-place piles. The pre-formed front-mounted high-strength fiber-reinforced composite material plates and rear-mounted high-strength fiber-reinforced composite material plates are then hoisted and inserted into the interlocking grooves. After installation, the components are fixed with high-strength bolts and put into use. The high-strength combination structure of the front-mounted high-strength fiber-reinforced composite material plates, rear-mounted high-strength fiber-reinforced composite material plates, main reinforcing ribs, and auxiliary ribs forms a three-dimensional soil protection system. This system, in conjunction with the internal first and second fixing seats and spaced reinforcing steel bars, effectively ensures the safety of foundation pit construction. Simultaneously, the components are prefabricated in the factory, and on-site assembly construction is mainly carried out, reducing on-site wet work and complex construction processes, greatly shortening the construction cycle, and reducing labor intensity. The fiber-reinforced composite material has excellent corrosion resistance and good resistance to chemicals such as acids, alkalis, and salts. In the complex underground chemical environment, its service life is much longer than that of traditional steel protection structures. Furthermore, the special anti-corrosion treatment process used in the connecting device further improves the durability of the structure and reduces later maintenance costs.

[0016] 2. The soil protection structure between the cast-in-place piles of the foundation pit support structure is equipped with a drainage mechanism. The surfaces of the front and rear high-strength fiber reinforced composite material plates have reserved drainage holes distributed in a quincunx pattern. The quincunx pattern of drainage holes ensures the uniform distribution of water flow and avoids local water accumulation. This design allows water to penetrate into the soil more evenly, improving drainage efficiency and reducing water accumulation problems caused by poor drainage. The permeable pipes and geotextile wrapping layer are connected by tie straps. The permeable pipes enhance the drainage function, while the geotextile wrapping layer prevents soil particles from entering the permeable pipes and causing blockage. The drainage system can quickly remove groundwater, reduce pore water pressure in the soil, improve soil shear strength, further enhance soil stability, and reduce the risk of collapse. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cast-in-place pile structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the back of the structural protective mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the protective mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the drainage mechanism of this utility model.

[0023] In the diagram: 1. Cast-in-place pile; 2. Protective mechanism; 21. Fixing steel ring; 22. Reinforcing anchor; 23. Clip groove; 24. Front-mounted high-strength fiber-reinforced composite material plate; 25. Rear-mounted high-strength fiber-reinforced composite material plate; 26. First fixing seat; 27. Second fixing seat; 28. Interval reinforcing steel strip; 29. ​​Main reinforcing rib plate; 201. Auxiliary rib plate; 3. Drainage mechanism; 31. Reserved drainage hole; 32. Permeable pipe; 33. Geotextile wrapping layer; 4. External steel mesh; 5. Bottom embedded steel plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] This utility model provides the following technical solution:

[0027] Example 1

[0028] Please see Figure 1-5 A soil protection structure between cast-in-place piles in a foundation pit support structure includes cast-in-place pile 1, a protective mechanism 2 provided on the surface of cast-in-place pile 1, and a drainage mechanism 3 provided on the surface of the protective mechanism 2.

[0029] The protective mechanism 2 includes a fixed steel ring 21, which is installed on the surface of the cast-in-place pile 1. A reinforcing anchor 22 is installed on the surface of the fixed steel ring 21. A snap-fit ​​groove 23 is provided at the front end of the inner side of the fixed steel ring 21. A front high-strength fiber-reinforced composite material plate 24 and a rear high-strength fiber-reinforced composite material plate 25 are installed inside the snap-fit ​​groove 23. A first fixing seat 26 is welded to the front of the rear high-strength fiber-reinforced composite material plate 25, and a second fixing seat 27 is welded to the back of the front high-strength fiber-reinforced composite material plate 24. A spacer reinforcing steel strip 28 is welded between the first fixing seat 26 and the second fixing seat 27. Main reinforcing ribs 29 are fixedly connected to the left and right ends of the back of the rear high-strength fiber-reinforced composite material plate 25, and an auxiliary rib 201 is fixedly connected to the center of the bottom end of the back of the rear high-strength fiber-reinforced composite material plate 25. The fixed steel ring 21 and the reinforcing anchor 22 are pre-installed on the surface of the cast-in-place pile 1. The formed front high-strength fiber-reinforced composite material plate 24 and the rear high-strength fiber-reinforced composite material plate 25 are then hoisted together. The fiber-reinforced composite material plate 25 is inserted into the snap-fit ​​groove 23. After installation, the components are fixed with high-strength bolts and put into use. The high-strength combined structure of the front high-strength fiber-reinforced composite material plate 24, the rear high-strength fiber-reinforced composite material plate 25, the main reinforcing rib plate 29, and the auxiliary rib plate 201 forms a three-dimensional soil protection system. It is used in conjunction with the internal first fixing seat 26, second fixing seat 27, and spaced reinforcing steel strip 28 to effectively ensure the safety of foundation pit construction. At the same time, the components are prefabricated in the factory, and the on-site construction is mainly assembly-based, which reduces on-site wet work and complex construction processes, greatly shortens the construction cycle, and reduces labor intensity. Fiber-reinforced composite materials have excellent corrosion resistance and good resistance to chemicals such as acids, alkalis, and salts. In the complex underground chemical environment, the service life is long, far exceeding that of traditional steel protection structures. At the same time, the special anti-corrosion treatment process adopted by the connection device further improves the durability of the structure and reduces the later maintenance cost.

[0030] The first fixing seat 26, the second fixing seat 27 and the spacer reinforcing steel strip 28 are evenly distributed between the front high-strength fiber reinforced composite material plate 24 and the rear high-strength fiber reinforced composite material plate 25.

[0031] The high-strength fiber-reinforced composite material plate 25, the main reinforcing rib plate 29, and the auxiliary rib plate 201 are all integrally formed using a hot pressing process.

[0032] Example 2

[0033] Please see Figure 1-5Furthermore, based on Embodiment 1, the drainage mechanism 3 includes reserved drainage holes 31. These reserved drainage holes 31 are located on the surfaces of the front high-strength fiber-reinforced composite material plate 24 and the rear high-strength fiber-reinforced composite material plate 25. A permeable pipe 32 is installed inside each reserved drainage hole 31, and the outer end of the permeable pipe 32 is wrapped with a geotextile wrapping layer 33. The reserved drainage holes 31 are distributed in a quincunx pattern on the surfaces of the front and rear high-strength fiber-reinforced composite material plates 24 and 25. This quincunx-shaped distribution of drainage holes ensures accurate drainage. The design ensures even distribution of water flow and avoids localized water accumulation. This allows water to penetrate the soil more evenly, improving drainage efficiency and reducing water accumulation caused by poor drainage. The permeable pipe 32 and the geotextile wrapping layer 33 are connected by cable ties. The permeable pipe 32 enhances the drainage function, while the geotextile wrapping layer 33 prevents soil particles from entering the permeable pipe 32 and causing blockage. The drainage system can quickly remove groundwater, reduce pore water pressure in the soil, improve soil shear strength, further enhance soil stability, and reduce the risk of collapse.

[0034] The reserved drainage holes 31 are arranged in a quincunx pattern, and the permeable pipe 32 is made of HDPE material;

[0035] The front of the front high-strength fiber reinforced composite material plate 24 is equipped with an external steel mesh 4, and the bottom of the inner side of the front high-strength fiber reinforced composite material plate 24 and the rear high-strength fiber reinforced composite material plate 25 are equipped with a bottom embedded steel plate 5.

[0036] In actual operation, when this device is used, during construction at the bottom of the foundation pit, the bottom pre-embedded steel plate 5 is first fixed to the design position on the cushion reinforcement mesh, and then C25 concrete cushion is poured. The concrete is vibrated and compacted to ensure that the pre-embedded steel plate and the cushion are fully bonded. Next, the fixing steel ring 21 and the reinforcing anchor rod 22 are installed on the surface of the cast-in-place pile 1. The formed front high-strength fiber-reinforced composite material plate 24 and rear high-strength fiber-reinforced composite material plate 25 are inserted into the snap-fit ​​groove 23 by hoisting, and the front high-strength fiber-reinforced composite material plate 24 and rear high-strength fiber-reinforced composite material plate 25 are fixed to the bottom pre-embedded steel plate 5. After installation, the components are fixed with high-strength bolts and can be put into use. After installation, the external reinforcement mesh 4 can be installed on the front of the front high-strength fiber-reinforced composite material plate 24 for reinforcement and protection. The high-strength combined structure of fiber-reinforced composite material plate 24, post-installed high-strength fiber-reinforced composite material plate 25, main reinforcing rib plate 29, and auxiliary rib plate 201 forms a three-dimensional soil protection system. This system, in conjunction with the internal first fixing seat 26, second fixing seat 27, and spaced reinforcing steel bars 28, effectively ensures the safety of foundation pit construction. Furthermore, the components are prefabricated in the factory, and on-site assembly construction is mainly carried out, reducing on-site wet work and complex construction processes, significantly shortening the construction cycle and reducing labor intensity. The fiber-reinforced composite material has excellent corrosion resistance, exhibiting good resistance to acids, alkalis, salts, and other chemicals. In the complex underground chemical environment, its service life is long, far exceeding that of traditional steel protection structures. Additionally, the special anti-corrosion treatment process used in the connecting devices further improves the structure's durability and reduces subsequent maintenance costs.

[0037] The surfaces of the front-mounted high-strength fiber-reinforced composite material plate 24 and the rear-mounted high-strength fiber-reinforced composite material plate 25 are decorated with pre-reserved drainage holes 31 in a quincunx pattern. The quincunx pattern of drainage holes ensures the uniform distribution of water flow and avoids local water accumulation. This design allows water to penetrate the soil more evenly, improving drainage efficiency and reducing water accumulation caused by poor drainage. The permeable pipe 32 and the geotextile wrapping layer 33 are connected by cable ties. The permeable pipe 32 can enhance the drainage function, while the geotextile wrapping layer 33 can prevent soil particles from entering the permeable pipe 32 and causing blockage. The drainage system can quickly remove groundwater, reduce pore water pressure in the soil, improve soil shear strength, further enhance soil stability, and reduce the risk of collapse.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A soil protection structure between cast-in-place piles of a foundation pit support structure, comprising a cast-in-place pile (1), characterized in that: The surface of the cast-in-place pile (1) is provided with a protective mechanism (2), and the surface of the protective mechanism (2) is provided with a drainage mechanism (3); The protective mechanism (2) includes a fixed steel ring (21), which is installed on the surface of the cast-in-place pile (1). A reinforcing anchor rod (22) is installed on the surface of the fixed steel ring (21). A snap-fit ​​groove (23) is opened at the front end of the inner side of the fixed steel ring (21). A front high-strength fiber-reinforced composite material plate (24) is installed inside the snap-fit ​​groove (23). A rear high-strength fiber-reinforced composite material plate (25) is installed inside the snap-fit ​​groove (23). (25) A first fixing seat (26) is welded on the front side, and a second fixing seat (27) is welded on the back side of the front high-strength fiber reinforced composite material plate (24). A spacer reinforcing steel strip (28) is welded between the first fixing seat (26) and the second fixing seat (27). A main reinforcing rib plate (29) is fixedly connected to the left and right ends of the back side of the rear high-strength fiber reinforced composite material plate (25). An auxiliary rib plate (201) is fixedly connected to the center of the bottom end of the back side of the rear high-strength fiber reinforced composite material plate (25).

2. The soil protection structure between cast-in-place piles of a foundation pit support structure according to claim 1, characterized in that: The first fixing seat (26), the second fixing seat (27) and the spacer reinforcing steel strip (28) are evenly distributed between the front high-strength fiber reinforced composite material plate (24) and the rear high-strength fiber reinforced composite material plate (25).

3. The soil protection structure between cast-in-place piles of a foundation pit support structure according to claim 1, characterized in that: The rear high-strength fiber-reinforced composite material plate (25), main reinforcing rib (29) and auxiliary rib (201) are all integrally formed by hot pressing.

4. The soil protection structure between cast-in-place piles of a foundation pit support structure according to claim 1, characterized in that: The drainage mechanism (3) includes a reserved drainage hole (31), which is opened on the surface of the front high-strength fiber reinforced composite material plate (24) and the rear high-strength fiber reinforced composite material plate (25). A permeable pipe (32) is installed inside the reserved drainage hole (31), and the outer end of the permeable pipe (32) is wrapped with a geotextile wrapping layer (33).

5. A soil retention structure between cast-in-situ piles of a foundation pit support structure according to claim 4, wherein: The reserved drainage holes (31) are arranged in a quincunx pattern, and the permeable pipe (32) is made of HDPE material.

6. The soil protection structure between cast-in-place piles of a foundation pit support structure according to claim 1, characterized in that: The front of the front high-strength fiber reinforced composite material plate (24) is equipped with an external steel mesh (4), and the bottom of the inner side of the front high-strength fiber reinforced composite material plate (24) and the rear high-strength fiber reinforced composite material plate (25) are equipped with a bottom embedded steel plate (5).

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