Pile body wall protection structure suitable for super large diameter bored pile foundation

Abstract

The invention relates to the technical field of pile body wall protection, and proposes a pile body wall protection structure suitable for an extra-large diameter bored pile foundation, comprising an orifice annular beam, a convex ring is arranged on the top of the orifice annular beam, a grouting tube is arranged in the orifice annular beam, a corrugated plate is installed in the grouting tube, a connecting groove is provided on the grouting tube, a connecting plate is fittedly installed in the connecting groove, a connecting component is installed between the connecting plate and the grouting tube, an H-shaped steel is installed on the corrugated plate, a first through hole and a grouting hole are provided on the H-shaped steel, a switching component is arranged above the grouting hole, a connecting block is slidably installed on the switching component, and a first jack is fixedly connected to the connecting block. Through the above technical scheme, the problems that the existing pile body wall protection structure cannot be installed and lowered in sections layer by layer and cannot switch the concrete pouring method around the pile body wall protection are solved.

Description

Technical Field

[0001] The invention relates to the technical field of pile body wall protection, and in particular to a pile body wall protection structure suitable for an extra-large diameter bored pile foundation. Background Art

[0002] Conventional bored piles generally refer to pile foundations that are made by manual excavation, followed by placement of steel cages and on-site pouring of concrete. The diameter of such pile foundations is generally around 800~2000mm, and the pile body wall is a low-grade reinforced concrete structure with a thickness of generally between 100mm~1000mm. At present, my country is continuously building super-large diameter bored pile foundations, which are generally over 5m in diameter. They overcome the problems of general bored piles that cannot be excavated mechanically on a large scale, poor safety in small space underground operations, and the need for ventilation, and have great development prospects.

[0003] Conventional reinforced concrete retaining wall structures are no longer applicable to this type of pile foundation. When constructing a pile foundation, support is usually started after excavating to a certain depth, and then excavation continues. If reinforced concrete retaining walls are used, concrete must be poured along the perimeter of the pile foundation, which requires a large amount of work and a long construction period, which seriously affects the excavation of large-diameter pile foundations.

[0004] The invention patent with publication number CN110258550A discloses a prefabricated concrete retaining wall for bored piles and a construction method. The prefabricated retaining wall includes: a retaining wall body and an elastic structural layer; the retaining wall body is connected end to end to form a complete concrete retaining wall. The elastic structural layer is arranged on the outside of the retaining wall body. By arranging the elastic structural layer on the outside of the retaining wall body, the soil is compacted, soil collapse is prevented and the collapse time is reduced. The personal safety of construction workers is better guaranteed. Although the above-mentioned retaining wall can realize the function of compacting the soil when in use, the existing pile body retaining wall structure cannot be installed and lowered in sections layer by layer during use, and the concrete pouring method of the outer periphery of the pile body retaining wall cannot be switched. Summary of the invention

[0005] The present invention proposes a pile body retaining wall structure suitable for an extra-large diameter bored pile foundation, which solves the problem that the existing pile body retaining wall structure cannot be installed and lowered in sections layer by layer, and cannot switch the concrete pouring method of the periphery of the pile body retaining wall.

[0006] The technical solution of the present invention is as follows:

[0007] A pile body wall protection structure suitable for an extra-large diameter bored pile foundation comprises an orifice annular beam, a convex ring is arranged on the top of the orifice annular beam, a grouting tube is arranged in the orifice annular beam, a corrugated plate is installed in the grouting tube, a connecting groove is provided on the grouting tube, a connecting plate is fittedly installed in the connecting groove, a connecting assembly is installed between the connecting plate and the grouting tube, an H-shaped steel is installed on the corrugated plate, a first through hole and a grouting hole are provided on the H-shaped steel, a switching assembly is arranged above the grouting hole, a connecting block is slidably installed on the switching assembly, a first jack is fixedly connected to the connecting block, a first connecting block is fixedly connected to the top of the first jack, a second connecting block is fixedly arranged on the first connecting block, a second jack is installed between the second connecting block and the switching assembly, a connecting plate is fixedly connected to the second connecting block, a third through hole is provided on the connecting plate, a fourth through hole is provided on the corrugated plate, and connecting rods are arranged in the first through hole and the fourth through hole.

[0008] As a preferred solution of the present invention, a mounting groove is provided on the convex ring, a support tube is fitted in the mounting groove, the top surface of the support tube is a plane, and the top surface of the convex ring is an inclined surface.

[0009] As a preferred solution of the present invention, the connecting grooves are evenly distributed along the circumference of the grouting tube, and the positions of the connecting grooves on the grouting tube correspond one to one with the positions of the H-shaped steels.

[0010] As a preferred solution of the present invention, the H-shaped steel is symmetrically distributed on the upper and lower sides of the corrugated plate, the outer wall of the H-shaped steel is in contact with the inner wall of the grouting tube, there is a gap between the corrugated plate and the grouting tube, and the grouting hole is connected to the gap between the corrugated plate and the grouting tube.

[0011] As a preferred solution of the present invention, the position and number of the first through holes on the H-shaped steel correspond one-to-one to the position and number of the fourth through holes on the corrugated plate, and the upper and lower surfaces of the H-shaped steel are in contact with the corrugated plate.

[0012] As a preferred solution of the present invention, the connecting block and the grouting barrel are fixedly connected, the connecting block and the H-shaped steel are in contact with each other, the connecting block, the first jack, the first connecting block and the second connecting block are symmetrically distributed on the left and right sides of the top H-shaped steel, the first connecting block, the second connecting block and the connecting plate are fixedly connected to form an integral structure, and the connecting plate passes through the top H-shaped steel.

[0013] As a preferred solution of the present invention, the switching assembly includes a mounting tube fixedly connected to the H-shaped steel, the mounting tube and the second jack are fixedly connected, a guide block is fixedly connected to the side of the mounting tube, a lap plate is fixedly connected to the mounting tube, and a second through hole is opened on the lap plate.

[0014] As a preferred solution of the present invention, the inner wall of the lap plate and the outer wall of the connecting plate fit together, the diameter of the bottom of the guide block is larger than the diameter of the top of the guide block, the outer wall of the guide block and the inner wall of the connecting block fit together, the connecting block forms a sliding structure with the installation tube through the guide block, and the grouting tube forms a lifting structure with the H-shaped steel through the first jack and the second jack.

[0015] As a preferred solution of the present invention, the connecting assembly includes a connecting block slidably installed on the upper and lower sides of the connecting plate, a spring is fixedly connected between the connecting block and the connecting plate, and a connecting groove for connecting with the connecting block is provided on the grouting barrel, and the top of the connecting block and the connecting groove are both hemispherical structures.

[0016] The working principle and beneficial effects of the present invention are:

[0017] The modular corrugated plate is factory processed and installed on site to meet the requirements of rapid construction. The construction process is simple and the hoisting weight is light, which meets the requirements of the construction progress.

[0018] The pile body retaining wall is provided with grouting cylinders and H-shaped steels that fit each other. Grouting can be performed on the gaps between the grouting cylinders, H-shaped steels and corrugated plates, thereby improving the overall strength of the pile body retaining wall. During grouting, the mortar can be gradually infiltrated into the lower layer of the pile body retaining wall through the grouting cylinders on each layer of H-shaped steel, so that the grouting work can be completed at one time after the pile body retaining wall is installed layer by layer;

[0019] The pile body retaining wall is provided with corrugated plates and H-shaped steels of segmented structure. The alternately distributed corrugated plates and H-shaped steels can be constructed layer by layer. During the construction process, the connecting rods can be installed into the H-shaped steels and corrugated plates, so that the multi-segment structure of the corrugated plates and H-shaped steels can be stably installed, so that the pile body retaining wall can not only be installed and lowered in segments layer by layer, but also ensure the overall stability;

[0020] The wall protection structure is provided with a detachable connecting plate, a switching assembly and a connecting assembly. The connecting plate is automatically moved downward by shortening the second jack. During the downward movement of the connecting plate, the second through hole will be connected with the grouting hole. At the same time, the second jack will drive the connecting block, the first jack, the first connecting block and the second connecting block to move downward as a whole. Since the connecting block is fixedly connected to the grouting tube, the grouting tube will move downward and make the connecting groove on the grouting tube no longer correspond to the position of the H-shaped steel. At this time, the mortar can be discharged outward through the connecting groove during grouting. After the connecting plate is installed in the connecting assembly, only when the cavity pressure between the H-shaped steel, the corrugated plate and the grouting tube is large enough, the connecting block with a hemispherical structure at the top can be pushed into the connecting plate, so that the device can keep the H-shaped steel, the corrugated plate and the grouting tube filled with mortar, and then infiltrate mortar into the soil outside the device. The first jack can also be extended to make the position of the H-shaped steel correspond to the position of the connecting groove. At this time, the device only injects mortar between the H-shaped steel, the corrugated plate and the grouting tube, so that the device can switch the grouting method around the pile body wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure of the pile body wall protection structure applicable to the super-large diameter bored pile foundation of the present invention;

[0023] Figure 2 It is a schematic diagram of the disassembly structure of the connection plate and the grouting tube of the present invention;

[0024] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at center A;

[0025] Figure 4 yes Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 5 It is a schematic diagram of the connection structure between the connecting plate and the docking block of the present invention;

[0027] Figure 6 yes Figure 5 A magnified schematic diagram of the structure at C in the middle;

[0028] Figure 7 It is a schematic diagram of the split structure of the second connecting block and the connecting plate of the present invention;

[0029] Figure 8 It is a schematic diagram of the connection structure of the installation tube and the lap plate of the present invention;

[0030] Fig. 9 It is a schematic diagram of the connection structure between the convex ring and the support cylinder of the present invention;

[0031] Fig.10 This is a schematic diagram of the split structure of the H-shaped steel and the corrugated plate of the present invention;

[0032] Fig.11 It is a schematic diagram of the connection structure of H-shaped steel and corrugated plate of the present invention.

[0033] Figure numerals: 1. orifice annular beam; 2. convex ring; 3. mounting groove; 4. support tube; 5. grouting tube; 6. connecting plate; 7. connecting groove; 8. H-shaped steel; 9. first through hole; 10. connecting rod; 11. connecting block; 12. first jack; 13. first connecting block; 14. second connecting block; 15. second jack; 16. switching assembly; 1601. guide block; 1602. mounting tube; 1603. lap plate; 1604. second through hole; 17. connecting assembly; 1701. docking block; 1702. docking groove; 1703. spring; 18. connecting plate; 19. third through hole; 20. grouting hole; 21. corrugated plate; 22. fourth through hole. DETAILED DESCRIPTION

[0034] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0035] like Figure 1-Figure 11As shown, the present embodiment proposes a pile body wall protection structure suitable for an extra-large diameter bored pile foundation, comprising an orifice annular beam 1, a convex ring 2 is arranged on the top of the orifice annular beam 1, the convex ring 2 is used to support the orifice annular beam 1 on the soil surface, a grouting tube 5 is arranged in the orifice annular beam 1, a corrugated plate 21 is installed in the grouting tube 5, a connecting groove 7 is opened on the grouting tube 5, a connecting plate 6 is fitted in the connecting groove 7, a connecting component 17 is installed between the connecting plate 6 and the grouting tube 5, an H-shaped steel 8 is installed on the corrugated plate 21, the grouting tube 5 is installed around the outer side of the H-shaped steel 8 and the corrugated plate 21, the H-shaped steel 8 is opened with a first through hole 9 and a grouting hole 20, and mortar can be injected into the H-shaped steel 8 and the corrugated plate 21 through the grouting hole 20. The plate 21 and the gap between the grouting tube 5 are provided to improve the overall stability of the pile body wall protection. A switching component 16 is provided above the grouting hole 20, and a connecting block 11 is slidably installed on the switching component 16. A first jack 12 is fixedly connected to the connecting block 11, and a first connecting block 13 is fixedly connected to the top of the first jack 12. A second connecting block 14 is fixedly provided on the first connecting block 13, and a second jack 15 is installed between the second connecting block 14 and the switching component 16. A connecting plate 18 is fixedly connected to the second connecting block 14, and a third through hole 19 is provided on the connecting plate 18. A fourth through hole 22 is provided on the corrugated plate 21, and connecting rods 10 are provided in the first through hole 9 and the fourth through hole 22. The device can install the connecting plate 6 in the connecting groove 7 through the connecting component 17. When the position of the connecting groove 7 does not overlap with the position of the H-shaped steel 8, the mortar injected into the cavity between the H-shaped steel 8, the corrugated plate 21 and the grouting tube 5 can push the connecting plate 6 outward, so that the mortar can penetrate into the soil layer, thereby improving the overall stability of the device. When the position of the grouting tube 5 is switched, the grouting tube 5 can be moved downward as a whole by shortening the second jack 15 or extending the first jack 12, so that the device can inject mortar into the cavity between the H-shaped steel 8, the corrugated plate 21 and the grouting tube 5. When the pressure is large enough, the connecting component 17 will cause the grouting tube 5 and the connecting plate 6 to disengage from the engaging state under the action of pressure, so that the device can ensure that the mortar in the cavity between the H-shaped steel 8, the corrugated plate 21 and the grouting tube 5 is filled and then penetrate into the soil layer, ensuring the stability of the wall protection construction. Example 2

[0036] like Figure 1-Figure 11 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment also proposes a pile body wall protection structure suitable for super-large diameter bored pile foundation.

[0037] In this embodiment, a mounting groove 3 is opened on the convex ring 2, and a support tube 4 is installed in the mounting groove 3. The top surface of the support tube 4 is a plane, and the top surface of the convex ring 2 is an inclined surface. The inclined convex ring 2 can adapt to the slope for pile foundation construction work, and the support tube 4 can be installed in the mounting groove 3 so that the device can adapt to flat land for construction.

[0038] In this embodiment, the connecting grooves 7 are evenly distributed along the circumference of the grouting tube 5, and the positions of the connecting grooves 7 on the grouting tube 5 correspond to the positions of the H-shaped steels 8. Figure 1 and Figure 2 As shown, after grouting, the mortar will remain in the cavity between the H-shaped steel 8 and the grouting tube 5, and the evenly distributed connecting grooves 7 facilitate the subsequent extension of concrete around the retaining wall, thereby improving the overall stability of the device.

[0039] In this embodiment, the H-shaped steel 8 is symmetrically distributed on the upper and lower sides of the corrugated plate 21, the outer wall of the H-shaped steel 8 and the inner wall of the grouting tube 5 are in contact with each other, there is a gap between the corrugated plate 21 and the grouting tube 5, the grouting hole 20 and the gap between the corrugated plate 21 and the grouting tube 5 are connected to each other, and the device can inject grout into the grouting hole 20 of the uppermost H-shaped steel 8, so that the mortar enters the gap between the corrugated plate 21 and the grouting tube 5, thereby improving the overall strength of the protective wall.

[0040] In this embodiment, the position and number of the first through holes 9 on the H-shaped steel 8 correspond to the position and number of the fourth through holes 22 on the corrugated plate 21. The upper and lower surfaces of the H-shaped steel 8 are in contact with the corrugated plate 21. The first through holes 9 and the fourth through holes 22 that correspond in position can make the H-shaped steel 8 and the corrugated plate 21 stably connected. The H-shaped steel 8 and the corrugated plate 21 that are distributed alternately can be installed step by step, thereby making the wall protection construction more convenient.

[0041] In this embodiment, the connecting block 11 and the grouting tube 5 are fixedly connected, the connecting block 11 and the H-shaped steel 8 are fitted together, the connecting block 11, the first jack 12, the first connecting block 13 and the second connecting block 14 are symmetrically distributed on the left and right sides of the top H-shaped steel 8, the first connecting block 13, the second connecting block 14 and the connecting plate 18 are fixedly connected to form an integral structure, the connecting plate 18 runs through the top H-shaped steel 8, the first jack 12 can change the initial position of the grouting tube 5 when it is extended or shortened, and the connecting plate 18 can change the grouting method during the up and down movement.

[0042] In this embodiment, the switching component 16 includes a mounting tube 1602 fixedly connected to the H-shaped steel 8, the mounting tube 1602 is fixedly connected to the second jack 15, a guide block 1601 is fixedly connected to the side of the mounting tube 1602, a lap plate 1603 is fixedly connected to the mounting tube 1602, and a second through hole 1604 is opened on the lap plate 1603. When the second through hole 1604 on the mounting tube 1602 is opened, the H-shaped steel 8 will move downward at the same time, so that the device can move the H-shaped steel 8 downward while grouting, so that the mortar can seep out to the outside of the device later to improve the overall stability.

[0043] In this embodiment, the inner wall of the lap plate 1603 and the outer wall of the connecting plate 18 fit together, the diameter of the bottom of the guide block 1601 is larger than the diameter of the top of the guide block 1601, the outer wall of the guide block 1601 and the inner wall of the connecting block 11 fit together, and the connecting block 11 forms a sliding structure between the guide block 1601 and the installation tube 1602, and the grouting tube 5 forms a lifting structure with the H-shaped steel 8 through the first jack 12 and the second jack 15. The guide block 1601 can ensure that the connecting block 11 moves up and down stably, and the lap plate 1603 can ensure that the connecting plate 18 moves up and down vertically. Through the lifting structure and sliding structure on the device, the second jack 15 can inject grout into the grouting tube 5 and the H-shaped steel 8 when it is shortened, and the H-shaped steel 8 will also move downward, so that the H-shaped steel 8 can be used to seep mortar to the outside of the device to improve the firmness of the protective wall.

[0044] In this embodiment, the connecting component 17 includes a connecting block 1701 slidably installed on the upper and lower sides of the connecting plate 6, and a spring 1703 is fixedly connected between the connecting block 1701 and the connecting plate 6. A connecting groove 1702 for connecting with the connecting block 1701 is provided on the grouting tube 5. The top of the connecting block 1701 and the connecting groove 1702 are both hemispherical structures. When the device is grouting, as the pressure of the mortar gradually increases, the connecting plate 6 will be gradually pushed outward, and the connecting block 1701 with the hemispherical structure will be against the inner wall of the hemispherical space of the connecting groove 1702. The spring 1703 is compressed, and the connecting block 1701 gradually shrinks into the connecting plate 6 until the connecting plate 6 is detached from the grouting tube 5, thereby ensuring that the concrete in the protective wall is filled before the concrete seeps out.

[0045] Specifically, the present invention is a pile body wall protection structure suitable for an ultra-large diameter bored pile foundation. First, Figure 1-Figure 9As shown, the site is cleaned and leveled for subsequent construction, and the location of the excavation point of the hole ring beam 1 is determined by measurement and setting out. The excavator excavates the stepped foundation trench of the hole ring beam 1. After the steel bar factory processes the steel bars of the hole ring beam 1, the crane hoists the steel bars into the foundation trench, and pours concrete until the hole ring beam 1 is formed. After the hole ring beam 1 is formed, the crane hoists the excavator into the pit. Start vertical excavation of the foundation. The excavation diameter should be 30cm larger than the pile foundation diameter to reserve space for the installation of the corrugated plate 21 and the H-shaped steel 8. When excavating, keep the bottom two layers of H-shaped steel 8 and one layer of corrugated plate 21 in a suspended state, and hang the bottom two layers of H-shaped steel 8 and one layer of corrugated plate 21 to the bottom of the pile hole as the initially assembled H-shaped steel 8 and corrugated plate 21. Use a crane to hoist the second set of corrugated plates 21 and H-shaped steel 8 into the pit in sections, and keep the first two layers of H-shaped steel 8 and one layer of corrugated plates 21 in a suspended state. Connect the second set of corrugated plates 21 and H-shaped steel 8 with the first two layers of H-shaped steel 8 and one layer of corrugated plates 21. Then hoist the third set of corrugated plates 21 and H-shaped steel 8 to connect with the second set of corrugated plates 21 and H-shaped steel 8. Repeat this process until the bottom of the pile foundation is excavated. The excavation of the large-diameter pile foundation is completed. The grouting tube 5 is installed on the outside of the H-shaped steel 8 and the corrugated plates 21. The connecting block 11 is fixedly connected to the top of the grouting tube 5. The bottom of the switching assembly 16 is connected to the top H-shaped steel 8. Figure 1 and Fig. 9 As shown, when adapting to inclined surface construction, the convex ring 2 with an inclined top surface can be used, and when adapting to flat surface construction, the support tube 4 can be installed in the installation groove 3 in the convex ring 2, and the plane on the top of the support tube 4 can adapt to the flat ground construction environment.

[0046] like Figure 2-Figure 11As shown, by shortening the second jack 15, the connecting block 11, the first jack 12, the first connecting block 13, and the second connecting block 14 are moved downward as a whole, and the grouting tube 5 moves downward relative to the H-shaped steel 8 until the connecting groove 7 on the grouting tube 5 moves to the bottom of the H-shaped steel 8. At the same time, the connecting plate 18 moves downward, and the third through hole 19 on the connecting plate 18 is connected to the grouting hole 20. When the second through hole 1604 on the mounting tube 1602 is opened, the device can move the H-shaped steel 8 downward while opening the grouting channel, so that when the grouting reaches a certain degree, the mortar can seep out to the outside of the device. During grouting, the connecting plate 6 can be installed in the connecting groove 7, and the spring 1703 on the connecting assembly 17 can tighten the docking block 1701, and the docking block 1701 can tighten the inner wall of the docking groove 1702. The docking block 1701 with a hemispherical structure on the top can keep the connecting plate 6 and the grouting tube 5 in a flexible clamping state. After the connecting plate 6 is installed, the mortar pressure in the grouting space reaches a certain level, and the connecting plate 6 can be pushed outward to allow the mortar to penetrate into the soil layer to improve the firmness of the pile body wall. The guide block 1601 on the switching assembly 16 can ensure that the connecting block 11 moves vertically up and down, and the lap plate 1603 can ensure that the connecting plate 18 moves vertically up and down. The grouting tube 5 can be moved upward by shortening the first jack 12, and the grouting tube 5 slides on the outside of the H-shaped steel 8, and the grouting tube 5 is reset. At this time, the position of the connecting groove 7 on the grouting tube 5 corresponds to the position of the H-shaped steel 8. At this time, grouting will not cause mortar to seep out, thereby changing the grouting method of the device. It should be noted that during the construction of the device, the annular structure composed of H-shaped steel 8 and corrugated plate 21 is lowered section by section in the same manner as the caisson construction in the prior art. The annular structure itself plays a role in protecting the pit wall, and can effectively prevent the pit wall from collapsing or sinking, thereby ensuring construction safety. In addition, the grouting tube 5 on the outside of the H-shaped steel 8 and the corrugated plate 21 does not require precise reserved gaps. When the gap is too small, the downward movement of the grouting tube 5 will squeeze the soil. When the gap is too large, the device can use the above-mentioned mortar filling function to fill the gap, thereby ensuring safe construction. The construction method of the device is a mature method of internal excavation after lowering the ring parts section by section. The construction process is the same as the caisson method and underground continuous wall protection process in the prior art. The steps of segmented excavation and lowering the ring parts are: mechanical excavation is carried out inside the ring parts, and the earth is vertically transported out through the internal space. When the excavation reaches about 0.5-1 times the height of the ring parts below the bottom of the current ring parts, the excavation is suspended. The specific depth is dynamically adjusted according to the geological report. In order to ensure safe construction, the verticality of the ring parts and the soil pressure are monitored in real time by laser inclinometers, stress sensors and other equipment during the construction process. If deviation or abnormal stress is found, it is immediately corrected by adjusting the excavation sequence and adjusting the single excavation depth to ensure construction safety until the design depth is reached and the construction is stopped.For example, in the prior art, there is an invention patent with publication number CN118309095A, which discloses an assembled caisson hoisting mechanism and an assembly construction method. The device also uses caisson construction to realize the function of the ring structure below the segment.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pile body wall protection structure suitable for a bored pile foundation of an extra-large diameter, comprising a hole opening annular beam (1), characterized in that: The top of the orifice annular beam (1) is provided with a convex ring (2), a grouting tube (5) is provided in the orifice annular beam (1), a corrugated plate (21) is installed in the grouting tube (5), a connecting groove (7) is provided on the grouting tube (5), a connecting plate (6) is fitted in the connecting groove (7), a connecting component (17) is installed between the connecting plate (6) and the grouting tube (5), an H-shaped steel (8) is installed on the corrugated plate (21), a first through hole (9) and a grouting hole (20) are provided on the H-shaped steel (8), a switching component (16) is provided above the grouting hole (20), and a connecting component (17) is slidably installed on the switching component (16). A block (11), a first jack (12) is fixedly connected to the connecting block (11), a first connecting block (13) is fixedly connected to the top of the first jack (12), a second connecting block (14) is fixedly arranged on the first connecting block (13), a second jack (15) is installed between the second connecting block (14) and the switching assembly (16), a connecting plate (18) is fixedly connected to the second connecting block (14), a third through hole (19) is provided on the connecting plate (18), a fourth through hole (22) is provided on the corrugated plate (21), and connecting rods (10) are arranged in the first through hole (9) and the fourth through hole (22); The switching assembly (16) comprises a mounting tube (1602) fixedly connected to the H-shaped steel (8), the mounting tube (1602) and the second jack (15) being fixedly connected, a guide block (1601) being fixedly connected to the side of the mounting tube (1602), a lap plate (1603) being fixedly connected to the mounting tube (1602), and a second through hole (1604) being provided on the lap plate (1603).

2. The pile body wall protection structure suitable for super-large diameter bored pile foundation according to claim 1 is characterized in that: The convex ring (2) is provided with a mounting groove (3), a support tube (4) is fitted in the mounting groove (3), the top surface of the support tube (4) is a plane, and the top surface of the convex ring (2) is an inclined surface.

3. The pile body wall protection structure suitable for super-large diameter bored pile foundation according to claim 1 is characterized in that: The connecting grooves (7) are evenly distributed along the circumference of the grouting tube (5), and the positions of the connecting grooves (7) on the grouting tube (5) correspond one to one with the positions of the H-shaped steels (8).

4. The pile body wall protection structure suitable for super-large diameter bored pile foundation according to claim 1 is characterized in that: The H-shaped steel (8) is symmetrically distributed on the upper and lower sides of the corrugated plate (21); the outer wall of the H-shaped steel (8) and the inner wall of the grouting tube (5) are in contact with each other; a gap exists between the corrugated plate (21) and the grouting tube (5); and the grouting hole (20) and the gap between the corrugated plate (21) and the grouting tube (5) are in communication with each other.

5. The pile body wall protection structure suitable for super-large diameter bored pile foundation according to claim 1, characterized in that: The position and number of the first through holes (9) on the H-shaped steel (8) correspond to the position and number of the fourth through holes (22) on the corrugated plate (21), and the upper and lower surfaces of the H-shaped steel (8) are in contact with the corrugated plate (21).

6. The pile body wall protection structure suitable for super-large diameter bored pile foundation according to claim 1, characterized in that: The connecting block (11) and the grouting cylinder (5) are fixedly connected, the connecting block (11) and the H-shaped steel (8) are fitted together, the connecting block (11), the first jack (12), the first connecting block (13) and the second connecting block (14) are symmetrically distributed on the left and right sides of the top H-shaped steel (8), the first connecting block (13), the second connecting block (14) and the connecting plate (18) are fixedly connected to form an integral structure, and the connecting plate (18) passes through the top H-shaped steel (8).

7. The pile body wall protection structure suitable for super-large diameter bored pile foundation according to claim 1 is characterized in that: The inner wall of the lap plate (1603) and the outer wall of the connecting plate (18) fit together, the diameter of the bottom of the guide block (1601) is larger than the diameter of the top of the guide block (1601), the outer wall of the guide block (1601) and the inner wall of the connecting block (11) fit together, the connecting block (11) forms a sliding structure with the guide block (1601) and the installation tube (1602), and the grouting tube (5) forms a lifting structure with the H-shaped steel (8) through the first jack (12) and the second jack (15).

8. The pile body wall protection structure suitable for super-large diameter bored pile foundation according to claim 1, characterized in that: The connection assembly (17) comprises a docking block (1701) slidably mounted on the upper and lower sides of the connection plate (6); a spring (1703) is fixedly connected between the docking block (1701) and the connection plate (6); a docking groove (1702) for docking with the docking block (1701) is provided on the grouting cylinder (5); and the top of the docking block (1701) and the docking groove (1702) are both hemispherical structures.

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