Anti-collapsing structure for water-rich stratum cast-in-place pile

Abstract

This application relates to a structure for preventing the collapse of cast-in-place pile holes in water-rich strata, belonging to the field of anti-collapse hole structures for cast-in-place piles. It includes a retaining wall cylinder, on the inner surface of which two sets of supporting semi-shells are symmetrically installed. The two sets of supporting semi-shells are connected by a top bending frame and a bottom bending frame, which are arranged opposite to each other. Both the top and bottom bending frames are rotatably connected to the supporting semi-shells, and the middle parts of the top and bottom bending frames are connected by an adjusting member. The anti-collapse hole structure of this application, through the synergistic effect of the retaining wall cylinder, supporting semi-shells, bending frames, and adjusting member, forms an adjustable support system. This system can flexibly adjust the support force according to different hole diameters and hole wall conditions, effectively enhancing the stability of the cast-in-place pile hole wall and greatly reducing the risk of hole collapse. The adjusting member allows this anti-collapse hole structure to adapt to the construction of cast-in-place piles of different sizes.

Description

Technical Field

[0001] This application relates to the technical field of anti-collapse hole structures for cast-in-place piles, and in particular to an anti-collapse hole structure for cast-in-place piles in water-rich strata. Background Technology

[0002] In numerous fields such as building construction, transportation engineering, and water conservancy engineering, cast-in-place piles, as an important foundation type, are widely used in key engineering components such as bridge piers, high-rise building foundations, and water conservancy project foundations due to their advantages such as adaptability to complex geological conditions and high bearing capacity. However, the special geological characteristics of water-rich strata, such as loose soil particles, high pore water pressure, and low shear strength, make borehole wall collapse a major challenge during the drilling process of cast-in-place piles.

[0003] Regarding the aforementioned technologies, it has been found that when excavating pile foundations in water-rich strata, especially sand and gravel layers, the sidewalls are difficult to stabilize under the action of water flow, often resulting in hole collapse. Sometimes, even increasing the specific gravity of the mud slurry is not enough to achieve a good wall protection effect. Utility Model Content

[0004] To prevent hole collapse during pile foundation excavation, this application provides a hole-prevention structure for cast-in-place piles in water-rich strata.

[0005] The technical solution for the anti-collapse hole structure of cast-in-place piles in water-rich strata provided in this application is as follows: A structure for preventing collapse of cast-in-place piles in water-rich strata includes a retaining wall cylinder. Two sets of supporting half-shells are symmetrically installed on the inner side of the retaining wall cylinder. The two sets of supporting half-shells are connected by a top bending frame and a bottom bending frame, which are arranged opposite to each other. Both the top bending frame and the bottom bending frame are rotatably connected to the supporting half-shells. The middle part of the top bending frame and the middle part of the bottom bending frame are connected by an adjusting member, which is used to adjust the distance between the middle parts of the top bending frame and the middle part of the bottom bending frame.

[0006] By adopting the above technical solution, the retaining wall casing provides a basic support framework for the entire anti-collapse borehole structure, which can initially prevent the borehole wall from collapsing. The two sets of supporting half-shells are connected by top and bottom bending frames, forming an adjustable support system. The adjusting mechanism can flexibly adjust the distance between the top and bottom bending frames, thereby changing the supporting force of the supporting half-shells on the retaining wall casing, adapting to the construction of cast-in-place piles with different borehole diameters and wall conditions, effectively enhancing the stability of the borehole wall and preventing borehole collapse.

[0007] Optionally, the supporting half-shell includes an arc-shaped middle plate and a concave seat for connecting the top bending frame and the bottom bending frame. The concave seat is installed at both ends of the arc-shaped middle plate and is fixedly connected to the arc-shaped middle plate.

[0008] By adopting the above technical solutions, the arc-shaped design of the arc-shaped middle plate can better fit the borehole wall of the cast-in-place pile, increase the contact area with the retaining wall, and improve the support effect. The concave seat provides a stable connection point for the top and bottom bending frames, making the connection between the support half-shell and the bending frame more robust and ensuring the stability of the entire support system.

[0009] Optionally, a number of anti-slip strips are evenly arranged from top to bottom on the outer side of the arc-shaped middle plate, and the anti-slip strips are integrally formed with the arc-shaped middle plate.

[0010] By adopting the above technical solution, the anti-slip strip increases the friction between the curved middle plate and the protective wall cylinder, preventing the supporting half-shell from sliding on the protective wall cylinder and further improving the support stability of the supporting half-shell on the hole wall. The one-piece molding design ensures the connection strength between the anti-slip strip and the curved middle plate, preventing the anti-slip strip from falling off during use.

[0011] Optionally, both the top and bottom bending frames include a connecting seat, a first connecting rod, and a second connecting rod. The first and second connecting rods are symmetrically installed on both sides of the connecting seat, and both the first and second connecting rods are rotatably connected to the connecting seat.

[0012] By adopting the above technical solution, this structural design allows for the adjustment flexibility of the top and bottom bending frames. The rotatable connection between the first and second connecting rods and the connecting seat enables the bending frame to deform accordingly when the distance is adjusted by the adjusting component, thereby moving the supporting half-shell and adjusting the supporting force of the wall-mounted cylinder. Simultaneously, the symmetrical structure ensures a uniform distribution of the supporting force, improving the supporting effect.

[0013] Optionally, the connecting seat includes a top plate, a longitudinal plate, and a positioning shaft for rotatably mounting the first connecting rod and the second connecting rod. The longitudinal plate is fixedly mounted on the front end face of the top plate, and the positioning shaft is fixedly mounted on the longitudinal plate.

[0014] By adopting the above technical solution, the top plate provides a stable support foundation for the connecting seat, and the arrangement of the longitudinal plate and the positioning shaft provides precise positioning and reliable support for the rotation of the first and second connecting rods, ensuring the smoothness and stability of the connecting rod rotation, so that the bending frame can accurately transmit the support force.

[0015] Optionally, the lower ends of the first and second connecting rods are provided with connecting holes, and the concave seat is provided with mating holes corresponding to the connecting holes, and the first and second connecting rods are rotatably connected to the concave seat through pins.

[0016] By adopting the above technical solution, the first and second connecting rods are rotatably connected to the concave seat through the cooperation of connecting holes, mating holes, and pins. This connection method is simple and reliable, easy to install and disassemble, and ensures that the connecting rods will not detach from the concave seat during rotation, thus ensuring the connection stability between the support half-shell and the bending frame.

[0017] Optionally, the adjusting component includes a double-ended screw, a push rod, and an operating cap, wherein the push rod is fixedly installed on the head of the double-ended screw, and the operating cap is fixedly installed on the head of the push rod.

[0018] By adopting the above technical solution, the double-ended screw design allows the adjusting component to change length through rotation, thereby adjusting the distance between the top and bottom curved frames. The top rod provides a leverage point for operation, and the operating cap allows construction personnel to manually rotate the adjusting component, making operation simple and convenient, and improving construction efficiency.

[0019] Optionally, a threaded sleeve connected to a double-ended screw is provided at the center of the inner side of the top plate, and the threaded sleeve is fixedly connected to the top plate.

[0020] By adopting the above technical solution, the cooperation between the threaded sleeve and the double-ended screw converts rotational motion into linear motion, enabling precise adjustment of the distance between the top and bottom curved frames by the adjusting component. The fixed connection between the threaded sleeve and the top plate ensures the stability of the adjustment process, allowing the adjusting force to be accurately transmitted to the curved frames, thereby adjusting the supporting force of the supporting half-shell.

[0021] In summary, this application includes at least one of the following beneficial technical effects: The anti-collapse hole structure of this application forms an adjustable support system through the synergistic action of the retaining wall cylinder, supporting half-shell, bending frame, and adjusting components. This system can flexibly adjust the support force according to different hole diameters and hole wall conditions, effectively enhancing the stability of the cast-in-place pile hole wall and significantly reducing the risk of hole collapse. The adjusting components allow this anti-collapse hole structure to adapt to the construction of cast-in-place piles of different sizes, eliminating the need for specially designed and manufactured anti-collapse hole devices for cast-in-place piles of different diameters, improving the adaptability and versatility of construction, and reducing construction costs. The anti-slip strips on the arc-shaped middle plate increase the friction between the structure and the retaining wall cylinder, preventing the supporting half-shell from sliding, further improving the support effect and ensuring construction quality. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure in an embodiment of this application.

[0023] Figure 2 This is a perspective view of the supporting half-shell, top bend, bottom bend, and adjusting component in the embodiments of this application.

[0024] Figure 3 yes Figure 2Top view of the device shown.

[0025] Figure 4 This is a perspective view of the top bending frame and adjusting component in the embodiments of this application.

[0026] Figure 5 yes Figure 4 Front view of the device shown.

[0027] Explanation of reference numerals in the attached drawings: 1. Wall-protecting cylinder; 2. Supporting half-shell; 21. Arc-shaped middle plate; 211. Anti-slip strip; 22. Concave seat; 221. Mating hole; 3. Top bending frame; 31. Connecting seat; 311. Seat top plate; 312. Longitudinal plate; 313. Positioning shaft; 32. First connecting rod; 321. Connecting hole; 33. Second connecting rod; 4. Bottom bending frame; 5. Adjusting component; 51. Double-ended screw; 52. Top rod; 53. Operating cap. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] This application discloses a structure for preventing the collapse of cast-in-place piles in water-rich strata. (Refer to...) Figure 1 , Figure 2 and Figure 3 As shown, a structure for preventing collapse of a cast-in-place pile in water-rich strata includes a retaining wall cylinder 1. The retaining wall cylinder 1 can be made of high-strength steel, such as Q345 steel, which has high strength and good toughness, and can withstand greater pressure. The thickness of the retaining wall cylinder 1 can be selected according to the diameter and depth of the cast-in-place pile. Two sets of supporting half-shells 2 are symmetrically installed on the inner side of the retaining wall cylinder 1. The two sets of supporting half-shells 2 are connected by a top bending frame 3 and a bottom bending frame 4, and the top bending frame 3 and the bottom bending frame 4 are arranged opposite to each other. Both the top bending frame 3 and the bottom bending frame 4 are rotatably connected to the supporting half-shells 2, and the middle part of the top bending frame 3 and the middle part of the bottom bending frame 4 are connected by an adjusting member 5. The adjusting member 5 is used to adjust the distance between the middle parts of the top bending frame 3 and the bottom bending frame 4. The retaining wall cylinder 1 provides a basic support frame for the entire anti-collapse hole structure, which can initially prevent the collapse of the hole wall. The two sets of supporting half-shells 2 are connected by the top bending frame 3 and the bottom bending frame 4 to form an adjustable support system. The adjusting component 5 can flexibly adjust the distance between the top bending frame 3 and the bottom bending frame 4, thereby changing the supporting force of the supporting half shell 2 on the wall casing 1, adapting to the construction of cast-in-place piles with different hole diameters and hole wall conditions, effectively enhancing the stability of the hole wall and preventing hole collapse.

[0030] Reference Figure 2 and Figure 3As shown, the supporting half-shell 2 includes an arc-shaped middle plate 21 and concave seats 22 for connecting the top bending frame 3 and the bottom bending frame 4. The concave seats 22 are installed at both ends of the arc-shaped middle plate 21 and are fixedly connected to the arc-shaped middle plate 21. The arc-shaped design of the arc-shaped middle plate 21 can better fit the retaining wall 1 of the cast-in-place pile, increase the contact area with the retaining wall 1, and improve the support effect. The concave seats 22 provide stable connection points for the top bending frame 3 and the bottom bending frame 4, making the connection between the supporting half-shell 2 and the bending frame more solid and ensuring the stability of the entire support system. The arc-shaped middle plate 21 and the concave seats 22 can be made of stainless steel, such as 304 stainless steel, which has good corrosion resistance and can adapt to the humid environment of water-rich strata. Several sets of anti-slip strips 211 are evenly arranged from top to bottom on the outer surface of the arc-shaped middle plate 21, and the anti-slip strips 211 are integrally formed with the arc-shaped middle plate 21. The anti-slip strip 211 increases the friction between the arc-shaped middle plate 21 and the protective wall cylinder 1, preventing the supporting half-shell 2 from sliding on the protective wall cylinder 1 and further improving the support stability of the supporting half-shell 2 on the hole wall. The one-piece molding design ensures the connection strength between the anti-slip strip 211 and the arc-shaped middle plate 21, preventing the anti-slip strip 211 from falling off during use.

[0031] Reference Figure 4 and Figure 5As shown, both the top bending frame 3 and the bottom bending frame 4 include a connecting seat 31, a first connecting rod 32, and a second connecting rod 33. The first connecting rod 32 and the second connecting rod 33 are symmetrically installed on both sides of the connecting seat 31, and both the first connecting rod 32 and the second connecting rod 33 are rotatably connected to the connecting seat 31. This structural design allows the top bending frame 3 and the bottom bending frame 4 to have adjustable flexibility. The rotatable connection between the first connecting rod 32 and the second connecting rod 33 and the connecting seat 31 allows the bending frame to deform accordingly when the distance is adjusted by the adjusting component 5, thereby driving the support half-shell 2 to move and realize the adjustment of the support force. At the same time, the symmetrical structure ensures the uniform distribution of the support force and improves the support effect. The connecting seat 31 includes a seat top plate 311, a longitudinal plate 312, and a positioning shaft 313 for rotatably mounting the first connecting rod 32 and the second connecting rod 33. The longitudinal plate 312 is fixedly installed on the front end face of the seat top plate 311, and the positioning shaft 313 is fixedly installed on the longitudinal plate 312. The top plate 311 provides a stable support foundation for the connecting seat 31. The longitudinal plate 312 and the positioning shaft 313 provide precise positioning and reliable support for the rotation of the first connecting rod 32 and the second connecting rod 33, ensuring the smoothness and stability of the connecting rod rotation and enabling the bending frame to accurately transmit the support force. The connecting seat 31, the first connecting rod 32, and the second connecting rod 33 can be made of No. 45 steel, which has high strength and hardness after heat treatment. The diameter of the connecting rod can be selected according to the magnitude of the support force. The lower ends of the first connecting rod 32 and the second connecting rod 33 are provided with connecting holes 321, and the concave seat 22 is provided with mating holes 221 corresponding to the connecting holes 321. The first connecting rod 32 and the second connecting rod 33 are rotatably connected to the concave seat 22 through the cooperation of the connecting holes 321, the mating holes 221, and the pin. The rotatable connection between the first connecting rod 32 and the second connecting rod 33 and the concave seat 22 is realized through the cooperation of the connecting holes 321, the mating holes 221, and the pin. This connection method is simple and reliable, easy to install and disassemble, and ensures that the connecting rod will not detach from the concave seat 22 during rotation, thus ensuring the connection stability between the support half shell 2 and the bending frame.

[0032] Reference Figure 4 and Figure 5As shown, the adjusting component 5 includes a double-ended screw 51, a push rod 52, and an operating cap 53. The push rod 52 is fixedly installed on the head of the double-ended screw 51, and the operating cap 53 is fixedly installed on the head of the push rod 52. The design of the double-ended screw 51 allows the adjusting component 5 to change its length by rotation, thereby adjusting the distance between the top bending frame 3 and the bottom bending frame 4. The push rod 52 provides a point of leverage for operation, and the operating cap 53 allows construction personnel to manually rotate the adjusting component 5, making operation simple and convenient and improving construction efficiency. The double-ended screw 51 can be made of trapezoidal thread, which has good transmission performance and self-locking properties. The push rod 52 and the operating cap 53 can be made of ordinary carbon steel, and the diameter of the operating cap 53 can be designed to be 80-100mm for easy operation by construction personnel. A threaded sleeve connected to the double-ended screw 51 is provided at the center of the inner side of the top plate 311, and the threaded sleeve is fixedly connected to the top plate 311. The threaded sleeve and the double-ended screw 51 work together to convert rotational motion into linear motion, enabling precise adjustment of the distance between the top bend 3 and the bottom bend 4 by the adjusting component 5. The fixed connection between the threaded sleeve and the seat top plate 311 ensures the stability of the adjustment process, allowing the adjusting force to be accurately transmitted to the bend 4, thereby adjusting the supporting force of the supporting half shell 2.

[0033] The implementation principle of the anti-collapse hole structure for cast-in-place piles in water-rich strata according to this application embodiment is as follows: During installation, the retaining wall cylinder 1 is placed into the hole of the cast-in-place pile, ensuring its verticality and stability. Two sets of supporting half-shells 2 are installed on the inner side of the retaining wall cylinder 1, aligning the concave seat 22 with the corresponding position. The top bending frame 3 and the bottom bending frame 4 are installed, and the lower ends of the first connecting rod 32 and the second connecting rod 33 are rotatably connected to the concave seat 22 through pins. At the same time, the connecting seat 31 is connected to the double-ended screw 51 of the adjusting component 5. By rotating the operating cap 53, the length of the adjusting component 5 is adjusted so that the supporting half-shell 2 fits tightly against the inner wall of the retaining wall cylinder 1, achieving a suitable support force and preventing deformation and damage to the retaining wall cylinder 1. During installation, it is necessary to ensure that the connection of each component is firm and that the pins are installed in place to prevent loosening. When adjusting the support force, it should be adjusted according to the actual situation of the hole wall to avoid excessive or insufficient support force. During construction, the stability of the anti-collapse hole structure should be checked regularly, and any abnormalities should be adjusted and dealt with promptly.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A structure for preventing collapse of cast-in-place piles in water-rich strata, comprising a retaining wall cylinder (1), characterized in that: Two sets of supporting half shells (2) are symmetrically installed on the inner side of the wall-mounted cylinder (1). The two sets of supporting half shells (2) are connected by a top bending frame (3) and a bottom bending frame (4). The top bending frame (3) and the bottom bending frame (4) are arranged opposite to each other. The top bending frame (3) and the bottom bending frame (4) are rotatably connected to the supporting half shells (2). The middle part of the top bending frame (3) and the middle part of the bottom bending frame (4) are connected by an adjusting member (5). The adjusting member (5) is used to adjust the distance between the middle part of the top bending frame (3) and the middle part of the bottom bending frame (4).

2. The anti-collapse hole structure for cast-in-place piles in water-rich strata according to claim 1, characterized in that: The supporting half shell (2) includes an arc-shaped middle plate (21) and a concave seat (22) for connecting the top bending frame (3) and the bottom bending frame (4). The concave seat (22) is installed at both ends of the arc-shaped middle plate (21) and is fixedly connected to the arc-shaped middle plate (21).

3. The anti-collapse hole structure for cast-in-place piles in water-rich strata according to claim 2, characterized in that: Several sets of anti-slip strips (211) are evenly arranged from top to bottom on the outer side of the arc-shaped middle plate (21), and the anti-slip strips (211) are integrally formed with the arc-shaped middle plate (21).

4. The anti-collapse hole structure for cast-in-place piles in water-rich strata according to claim 3, characterized in that: The top bending frame (3) and the bottom bending frame (4) both include a connecting seat (31), a first connecting rod (32) and a second connecting rod (33). The first connecting rod (32) and the second connecting rod (33) are symmetrically installed on both sides of the connecting seat (31), and the first connecting rod (32) and the second connecting rod (33) are rotatably connected to the connecting seat (31).

5. The anti-collapse hole structure for cast-in-place piles in water-rich strata according to claim 4, characterized in that: The connecting seat (31) includes a seat top plate (311), a longitudinal plate (312), and a positioning shaft (313) for the first connecting rod (32) and the second connecting rod (33) to be rotatably mounted. The longitudinal plate (312) is fixedly mounted on the front end face of the seat top plate (311), and the positioning shaft (313) is fixedly mounted on the longitudinal plate (312).

6. The anti-collapse hole structure for cast-in-place piles in water-rich strata according to claim 5, characterized in that: The lower ends of the first connecting rod (32) and the second connecting rod (33) are provided with connecting holes (321), and the concave seat (22) is provided with mating holes (221) corresponding to the connecting holes (321). The first connecting rod (32) and the second connecting rod (33) are rotatably connected to the concave seat (22) by a pin.

7. The anti-collapse hole structure for cast-in-place piles in water-rich strata according to claim 6, characterized in that: The adjusting component (5) includes a double-ended screw (51), a push rod (52) and an operating cap (53). The push rod (52) is fixedly installed on the head of the double-ended screw (51), and the operating cap (53) is fixedly installed on the head of the push rod (52).

8. The anti-collapse hole structure for cast-in-place piles in water-rich strata according to claim 7, characterized in that: A threaded sleeve connected to a double-ended screw (51) is provided at the center of the inner side of the top plate (311), and the threaded sleeve is fixedly connected to the top plate (311).

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