Combined rectangular pile hole retaining wall and construction method thereof

Abstract

The invention discloses a combined rectangular pile hole retaining wall and a construction method thereof, and belongs to the technical field of pile hole construction, the combined rectangular pile hole retaining wall comprises a plurality of rectangular shell-shaped standard sections and a blade foot combination body, and the blade foot combination body comprises a standard section and a cutting blade coaxially fixed at the bottom end of the standard section; the standard section comprises an upper bell and spigot and a lower inserting part which are respectively positioned at four corners of the upper end and the lower end, the standard section further comprises inner and outer layers of wall plates which are mutually spaced and parallel, and the two wall plates are fixed into a whole through a framework; a plurality of hooks are elastically and rotationally installed in the lower inserting parts through torsional springs, a plurality of bolts with the same number as the hooks are installed in the upper bell and spigot, and when every two adjacent standard sections are separated from each other, the hooks can hook the bolts so that the two standard sections can synchronously move upwards together. Continuous operation during pile hole excavation construction can be carried out, the protection wall can be fully recycled, modular assembly is achieved, and adaptability is high.

Description

Technical Field

[0001] This invention relates to the field of pile hole construction technology, specifically to a combined rectangular pile hole retaining wall and its construction method. Background Technology

[0002] When constructing square pile holes in geologically unstable strata, abnormalities such as hole collapse, diameter reduction, and deformation frequently occur, severely affecting the formation of the pile holes. Currently, the main method used is cast-in-place reinforced concrete retaining walls for support, supplemented by reverse excavation. However, with current methods, the cast-in-place reinforced concrete is a permanent investment that cannot be recycled. After pouring, it is necessary to wait for the reinforced concrete to reach its design strength before continuing to construct the pile hole. This results in frequent work stoppages, slow construction progress, and the inability to recycle the retaining walls formed by the cast-in-place concrete support, leading to unsatisfactory construction costs and efficiency.

[0003] Therefore, implementing pile hole wall protection using the existing construction methods will obviously lead to problems such as resource waste and construction delays. Summary of the Invention

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a combined rectangular pile hole retaining wall and its construction method, in order to solve the problems of resource waste, low construction efficiency, and easy delays in the current rectangular pile hole construction process.

[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: A composite rectangular pile hole retaining wall includes several rectangular shell-shaped standard sections and a cutting edge assembly. The cutting edge assembly includes a standard section and a rectangular cutting edge coaxially fixed to the bottom end of the standard section. The standard section includes an upper socket and a lower insertion part located at the four corners of each of the upper and lower ends. The standard section also includes two parallel and spaced-apart wall panels, which are fixed together by a frame. Each of the lower insertion parts has several hooks elastically rotatably installed by torsion springs. The upper socket has several pins of the same number as the hooks, which are fixed between the two wall panels in a direction perpendicular to the wall panels. When two adjacent standard sections are joined together, the hooks and pins make contact with each other by pressing and swinging to one side, so that the hooks are not blocked by the pins during downward movement. When the two joined standard sections are separated, the hooks can hook the pins to achieve synchronous upward movement of the two standard sections.

[0006] Furthermore, each wall panel is formed by several rectangular plate-shaped interlocking plates and right-angled corner plates in sequence, and is detachably fixed to the frame as a whole; The frame consists of a rectangular grid frame, vertical rectangular tubes, and hollow longitudinal beams with an L-shaped cross-section. The grid frame is located in the center of the two wall panels. Several vertically arranged vertical rectangular tubes are installed on both sides of the grid frame. The vertical rectangular tubes are connected to the longitudinal beams located at the four corners to form a rectangular frame structure. The locking plate is fixedly connected to the vertical rectangular tubes by fixing pins.

[0007] Furthermore, each pair of pins is provided in each of the upper bearing sockets, and each pair of pins is arranged perpendicular to each other between the corresponding two wall plates.

[0008] Furthermore, each of the four corners of the two wall panels is embedded with a longitudinal beam consisting of three vertically arranged rectangular tubes. The three rectangular tubes in the longitudinal beam are integrally formed in a triangular shape. The upper socket and the lower connector are located at the upper and lower ends of the longitudinal beam, respectively. The two ends of the hinge shaft of the hook are rotatably installed in the rectangular structural holes on both sides of the right-angle region of the longitudinal beam. The torsion spring is coaxially sleeved on the hinge shaft. One end of the torsion spring is connected to the inner wall of the rectangular structural hole, and the other end is connected to the side of the hook fixed on the hinge shaft. The bottom end of the hook is a hook-shaped structure that bends upward, and the top end is a vertical hook handle. The top end of the hook handle is vertically fixed to the hinge shaft, and the torsion spring makes the hook handle vertically set.

[0009] Furthermore, at each of the four corners of the two wall panels, three vertically arranged rectangular tubes are embedded and fixed to form a longitudinal beam, and the three rectangular tubes in the longitudinal beam are integrally formed in a triangular shape. The hook includes a hanging rod portion fixed in a downward-facing, arc-shaped groove, and a bearing shaft fixed in rectangular structural holes on both sides of the right-angle region of the longitudinal beam. The arc-shaped groove of the hanging rod portion is used to hook the pin in the standard section that it mates with. The bearing shaft and the corresponding pin are arranged vertically and perpendicularly to each other. One end of the bearing shaft is fixed to a П-shaped suspension frame, and the other end can rest on a bearing block fixed to the wall of the rectangular structural hole. One end of the hanging rod portion is rotatably mounted at the center of the bottom of the suspension frame, and the front and rear sides of the end of the hanging rod portion are each provided with a torsion spring sleeved on the suspension frame, so that the non-bent section of the hanging rod portion in its normal state can be parallel to the bearing shaft.

[0010] This invention also specifically proposes a construction method for rectangular pile hole retaining walls, which mainly adopts the aforementioned combined rectangular pile hole retaining wall construction method, and the specific operation is as follows: S1. After determining the location of the rectangular pile hole, use the wall-mounting and dismantling machine to align the four corners of the cutting edge assembly with the four corners of the rectangular pile hole and press it vertically into the soil layer. After excavating to a set depth in the inner area of ​​the cutting edge assembly, lift the standard section using the wall-mounting and dismantling machine. Use the lower plug to insert into the corresponding upper socket to achieve vertical series splicing of two adjacent standard sections, so that the standard section and the cutting edge assembly are connected to form a rectangular integral wall placed on the ground. S2. Continue to excavate the soil within the rectangular pile hole area within the standard section. As the soil in the rectangular pile hole is excavated, the subsequent standard sections are pressed in one by one for assembly and splicing. During assembly and splicing, when the current top standard section is about to be buried in the soil layer, the next standard section is hoisted and combined with it, and the soil is excavated again. This process is repeated until the pile hole is excavated to the design depth.

[0011] S3. After the rectangular pile hole is dug, during the process of pouring concrete into the pile hole, while pouring concrete downwards, the corresponding standard section is pulled upwards using the wall-mounting and dismantling integrated machine. After the soil layer is pulled out at the connection point of the two adjacent standard sections, the pin is pulled out, and the previous standard section can be removed. Then, the subsequent standard sections are pulled out until all the wall sections are pulled out.

[0012] Furthermore, during the process of pulling out the standard section, the wall-mounting and dismantling machine only pulls out the standard section when the concrete is about to be poured in or has been partially poured into it.

[0013] Furthermore, the wall-mounting and dismantling integrated machine includes a smooth-surfaced base plate for standard sections to be placed upright, with the base plate lying flat on the ground; It also includes a drive chamber located above the base plate and connected to the mechanical arm. The drive chamber has a hollow worm gear and a hollow worm arranged in a cross shape and meshing with each other. Two studs with opposite directions of rotation are coaxially threaded inside the hollow worm gear and the hollow worm. Each stud has an L-shaped buckle plate fixed to its free end. The two inner sidewalls of the buckle plate can be attached to the inner sidewall and top surface of the standard section, respectively. So that when the worm gear drives, all buckles are in contact with the corresponding parts of the standard section, and the standard section is clamped and positioned. After the mechanical arm rotates to a set angle, it places the standard section directly above the rectangular pile hole. An L-shaped curved beam is fixed to the top of the buckle plate. The curved beam and the stud are coaxially connected to the first connecting ring and the second connecting ring, which are respectively coaxially fixed. The first connecting ring has an annular guide groove on its mating end face, and the second connecting ring has a number of screw holes arranged in an annular array on its mating end face. A bolt-shaped stud is slidably installed in the annular guide groove. After the threaded end of the stud passes through the screw hole, a locking kit is installed, and the cap end of the stud is slidably located in the annular guide groove. The wall-mounting and dismantling integrated machine in this construction method also includes a high-pressure spring. The two ends of the high-pressure spring are located within the end faces of two connecting rings and can move freely axially. The tightening amount of the locking kit ensures that the two connecting rings form an integrated structure before the two opposing snap plates fully contact the corresponding parts of the standard section. When the two opposing snap plates fully contact the corresponding parts of the standard section, the two connecting rings rotate relative to each other. The locking kit is a cylindrical gear with a threaded hole that mates with the bolt thread. An adjusting ring is rotatably mounted coaxially on the outer side of the two connecting rings. The adjusting ring and the two connecting rings cannot move axially. The inner wall of one end of the adjusting ring is an internal gear that meshes with all the cylindrical gears, so that all locking kits can be tightened synchronously when the adjusting ring is rotated. A compressed elastic washer is also sandwiched between the adjusting ring and the end face of one of the connecting rings to give the adjusting ring a preload relative to the connecting ring. The other end of the adjusting ring is axially pressed and fixed by a pressure ring that is threaded into the end face of the other connecting ring.

[0014] (III) Beneficial Effects This invention provides a modular rectangular pile hole retaining wall and its construction method, which saves costs without affecting project quality. The modular retaining wall can be flexibly assembled according to depth, and can effectively support pile holes of various sizes simply by replacing the inner and outer wall panels of different lengths, without replacing any other components. Simultaneously, this invention allows for rapid recovery after concrete pouring, shortening the construction period without compromising safety, and improving construction efficiency and quality. Using modular steel square retaining walls, the rectangular pile hole is pressed downwards synchronously during pile hole excavation to support the surrounding soil. Furthermore, this invention effectively reduces the need for steel reinforcement processing areas and concrete mixing or pouring areas on the construction site, promoting civilized construction and safety management.

[0015] In short, the present invention has the following beneficial effects: 1. Using standard steel sections as retaining walls replaces cast-in-place reinforced concrete retaining walls, making construction more convenient.

[0016] 2. The steel retaining wall (a combination of standard section and cutting edge) can be pressed down synchronously with the progress of pile hole excavation, so that the pile hole excavation construction does not need to be stopped.

[0017] 3. Once the pile hole is formed, after the pile body concrete is poured, the steel retaining wall is quickly and accurately installed and removed using an integrated retaining wall installation and removal machine, enabling rapid recycling and reuse.

[0018] 4. The modular assembly of the standard section and the cutting edge allows it to adapt to pile hole construction at different depths, providing good versatility. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram of a standard section of a combined rectangular pile hole retaining wall according to the present invention; Figure 2 A three-dimensional structural diagram of the blade assembly; Figure 3 This is a schematic diagram of the bottom structure of a standard section; Figure 4 This is a schematic diagram of the bottom structure of the blade assembly; Figure 5 This is a structural diagram of one type of hook. Figure 6 This is the bottom view of the longitudinal beam (bottom view of the lower connector). Figure 7 for Figure 6 A schematic diagram of one of the hooks in the structure shown, after being cross-sectioned from the hook shank. Figure 8 A schematic diagram showing the installation of a pair of hooks inside the rectangular structural hole of the longitudinal beam; Figure 9 A bottom view of installing another hook structure inside the rectangular structural hole of the longitudinal beam; Figure 10 This is a schematic diagram of the hanging rod portion in another structure of the hook; Figure 11 for Figure 9 Left view of the suspension gantry mounting bracket section; Figure 12 This is a top view of the wall-mounting and dismantling machine used in one of the rectangular pile hole wall construction methods of the present invention when a standard section is clamped and fixed. Figure 13 This is a sectional view of the connection structure between the stud and the bent beam. Figure 14 for Figure 13 Right view of the structure shown; Figure 15 for Figure 13 Right view of the first connecting ring in the middle; Figure 16 A schematic diagram showing all locking components secured by the adjusting ring sleeve; Figure 17 This is a cross-sectional view of an elastic washer.

[0020] In the diagram: 1. Socket; 2. Plug; 3. Hook; 311. Hook-shaped structure; 312. Hook handle; 4. Pin; 5. Fixing pin; 6. Outer wall panel; 7. Inner wall panel; 8. Frame; 9. Vertical rectangular tube; 10. Longitudinal beam; 1001. Rectangular structural hole; 11. Cutting edge; 12. Hinge shaft; 13. Torsion spring; 14. Bearing shaft; 15. Suspension frame; 16. Hanging rod; 1601. Arc-shaped groove; 17. Bearing block; 18. Base plate; 19. Drive compartment; 20. Hollow worm gear; 21. Hollow worm; 22. Bearing; 23. Buckle plate; 24. Stud; 25. Bent beam; 26. First connecting ring; 2601. Annular guide groove; 2602. Mounting groove; 27. Second connecting ring; 28. Bolt; 29. ​​Locking kit; 30. High-pressure spring; 31. Washer; 32. Adjusting ring sleeve; 3201. Internal gear; 33. Elastic washer; 34. Pressure ring; 35. Wing plate. Detailed Implementation

[0021] This specification will clearly and completely describe the technical solutions in the following embodiments based on the accompanying drawings. The embodiments described in this specification are only some embodiments of the present invention, not all embodiments. All other embodiments derived by those skilled in the art based on these embodiments without creative effort should fall within the protection scope of the present invention.

[0022] like Figures 1-4 The illustrated modular rectangular pile hole retaining wall, during manufacturing, mainly comprises several rectangular shell-shaped standard sections and a cutting edge assembly. Both are rectangular to accommodate the rectangular pile hole to be constructed. These standard sections can be installed in series, with the cutting edge assembly fixed at the bottom. The bottom of the cutting edge assembly has... Figure 4 The cutting edge 11 shown is used for cutting, thereby pressing down the cutting edge assembly to delineate the excavation area, so as to excavate the soil layer within each standard section and obtain the segmented sections of the rectangular pile hole. During installation, this cutting edge assembly includes a standard section and a rectangular cutting edge 11 coaxially fixed to the bottom end of the standard section. The connection method between the two is completely consistent with the butt joint installation of adjacent standard sections. In this embodiment, as shown... Figure 1As shown, a single standard section includes upper sockets 1 and lower connectors 2 located at the four corners of each end. When assembling adjacent standard sections, the lower connector of the upper section is inserted into the upper socket 1 of the lower section to achieve alignment, insertion, and series installation. Specifically, this standard section also includes two parallel and spaced-apart wall panels, namely an inner wall panel 7 and an outer wall panel 6. The two wall panels are fixed together by a steel plate frame 8 to improve strength and integrity. For easy and quick connection, several hooks 3 are elastically rotatably installed in the lower connectors 2 by torsion springs 13. Several pins 4, the same number as the hooks 3, are installed in the upper sockets 1. The pins 4 are fixed between the two wall panels in a direction perpendicular to the wall panels, serving as the leverage point for the hooks 3 to lift the lower standard section. During the process of connecting two adjacent standard sections, the cylindrical surfaces of the hook 3 and the pin 4 press against each other and swing to one side. For example, when connecting two standard sections, after the lower section has been installed in the pile hole, the upper section moves downwards facing the lower section, so that the corresponding lower insertion part 2 is inserted into the upper bearing socket 1. At the initial moment of insertion, the bottom of the hook 3 touches the pin 4, which causes the hook 3 to deflect to one side under the action of the torsion spring 13, so that the hook 3 is not blocked by the pin 4 during the downward movement, and then the pin 4 enters the inside of the hook 3 to complete the connection installation. When disassembly is required, the upper standard section is lifted upwards, and the lower insertion part 2 moves upwards from the upper bearing socket 1. Since the pin 4 is located inside the hook 3, it is naturally hooked by the hook 3, thus moving the lower standard section connected to it upwards as well. When it moves out to the point where the joint of the two standard sections is outside the pile hole, the pin 4 can be manually pulled out, and then the two standard sections can be disassembled. In the above design, the key is that hook 3 does not obstruct the docking of standard sections, and when the two docked standard sections separate, hook 3 can hook pin 4 to achieve synchronous upward movement of the two standard sections.

[0023] As shown in the figure, each layer of wall panel is formed by several rectangular plate-shaped locking plates 23 and right-angled corner plates in sequence, and is detachably fixed to the frame 8. The locking plates 23 and corner plates are actually the outline panels of the standard section, which together form the corresponding wall panel, making it easy to disassemble and replace when there is local damage.

[0024] In actual manufacturing, the frame 8 may be fixed together with a rectangular grid frame, vertical rectangular tubes 9 and hollow longitudinal beams 10 with an L-shaped cross-section. The grid frame is located in the center of the two wall panels. Several vertically arranged vertical rectangular tubes 9 are installed on both sides of the grid frame. The vertical rectangular tubes 9 are connected to the longitudinal beams 10 located at the four corners. These components are bolted or pinned together to form a rectangular frame structure. For example, the locking plate 23 is fixedly connected to the vertical rectangular tubes 9 by fixing pins 5.

[0025] In this embodiment, as Figures 1-2As shown, each pair of pins 4 is provided in each upper bearing socket 1, and each pair of pins 4 is set perpendicular to each other between the corresponding two wall plates to improve the stability and reliability when lifting the standard section.

[0026] As another specific implementation structure: such as Figure 3 At each of the four corners of the two wall panels, three vertically arranged rectangular tubes are embedded and fixed to form a longitudinal beam 10. The three rectangular tubes in the longitudinal beam 10 are integrally formed in a triangular shape. The upper socket 1 and the lower insertion part 2 are located at the upper and lower ends of the longitudinal beam 10, respectively. Specifically, the bottom end of the longitudinal beam 10 can be exposed on the lower side of the wall panel, while the upper end is lower than the upper side of the wall panel, which facilitates the insertion and installation of adjacent standard sections to form a complete and regular rectangular outline. Based on the above structural design, the two ends of the hinge shaft 12 of the hook 3 are rotatably installed in the rectangular structural holes 1001 on both sides of the right-angle area of ​​the longitudinal beam 10. A torsion spring 13 is coaxially sleeved on the hinge shaft 12. One or two torsion springs 13 can be set as needed. One end of the torsion spring 13 is connected to the inner wall of the rectangular structural hole 1001, and the other end is connected to the side of the hook 3 fixed on the hinge shaft 12 to restrict the initial posture of the hook 3. As one specific example of the hook 3 structure: the bottom end of this hook 3 is an upwardly curved hook-shaped structure 311, specifically, its cross-section can be as follows... Figures 6-7 The circle in the middle, or like Figure 5 The rectangle shown has a hook 3 with a short vertical hook shank 312 at the top. A hinge pin 12 is vertically fixed to the top of the hook shank 312, or as shown in the figure. Figure 5 It can be vertically fixed to the lower side of the hinge shaft 12 as shown.

[0027] In this embodiment, a different design is adopted for the hook 3: Similar to the previous embodiment, three vertically arranged rectangular tubes are embedded and fixed at each of the four corners of the two wall panels to form a longitudinal beam 10. The three rectangular tubes in the longitudinal beam 10 are integrally formed in a triangular shape. The difference is that, as shown in the figure, this hook 3 is not the common hook-shaped structure 311, but rather includes a centrally recessed, downward-facing, arc-shaped groove 1601. Figure 10 The hanging rod 16 shown is made of a round rod with flattened sides to facilitate contact and force transmission with the corresponding torsion spring 13. Figure 9 The hook 3 is also equipped with a bearing shaft 14 fixed in rectangular structural holes 1001 on both sides of the right-angle region of the longitudinal beam 10. The arc-shaped groove 1601 of the hanging rod part 16 is used to hook the pin 4 in the standard section that it mates with. That is, the pin 4 is set perpendicular to the hanging rod part 16 for hooking. Specifically, the bearing shaft 14 and the corresponding pin 4 are arranged vertically and perpendicular to each other, as described in the reference. Figure 11 One end of the bearing shaft 14 is fixed with a П-shaped suspension frame 15, such as Figure 9The other end can rest on the bearing block 17 fixed to the wall of the rectangular structural hole 1001. One end of the hanging rod 16 is rotatably installed at the bottom center of the gantry frame 15, and each of the front and rear sides of the hanging rod 16 end is provided with a torsion spring 13 sleeved on the gantry frame 15, so that the non-bent section of the hanging rod 16 in its normal state can be parallel to the bearing shaft 14, that is, the entire length direction of the hanging rod 16 is parallel to the bearing shaft 14, and then perpendicular to the pin 4, so that when the standard section moves up and separates from another standard section, the hanging rod 16 contacts the pin 4, that is, the pin 4 prevents the hanging rod 16 from moving up, and then enters the arc-shaped groove 1601. By pulling the pin 4, the corresponding standard section is brought out of the pile hole.

[0028] Based on the above embodiments, a method for constructing a rectangular pile hole retaining wall is now described in detail. This method primarily employs the aforementioned combined rectangular pile hole retaining wall. During construction, after determining the location of the rectangular pile hole on the excavated ground, a retaining wall assembly / disassembly machine is used to vertically press the four corners of the cutting edge assembly into the soil layer, aligning them with the four corners of the rectangular pile hole. This ensures the stable installation of the cutting edge assembly after excavating to a set depth within the inner area of ​​the cutting edge assembly. Then, standard sections are lifted using the retaining wall assembly / disassembly machine, and the lower insertion part 2 is inserted into the corresponding upper insertion port 1 to vertically connect two adjacent standard sections, forming a rectangular retaining wall placed on the ground. This retaining wall is then further excavated downwards to increase the excavation depth. During construction, the soil within the rectangular pile hole area continues to be excavated downwards within the current standard section. As the soil excavation of the rectangular pile hole progresses, subsequent multi-section standard sections are simultaneously pressed downwards for assembly and splicing, providing temporary support for the already excavated rectangular pile hole portion. Specifically, during assembly, just as the topmost standard section is about to be buried in the soil, the next standard section is hoisted and combined with it, then cut downwards, and the soil is excavated again. This process is repeated until the pile hole reaches the designed depth. Finally, after the rectangular pile hole is excavated, during the pouring of concrete into the pile hole, it is best to simultaneously pull out the retaining wall. A retaining wall assembly / disassembly machine can be used to pull out the corresponding standard sections upwards. Once the joint between two adjacent standard sections is cleared from the soil for manual operation, pin 4 is pulled out, allowing the previous standard section to be removed. This process continues, pulling out subsequent standard sections until all retaining walls are removed. This ensures that the retaining wall is gradually disassembled during concrete pouring, allowing for simultaneous construction and ensuring safety and reliability. It should be noted that, in practice, during the extraction of a standard section, it is best to wait until the concrete is about to be poured or has been partially poured into the section to be extracted. For example, when there are still a few sections of the standard section that have not been filled with concrete, or when the concrete has been poured to half of the section to be extracted, before the wall-mounting and dismantling machine extracts the section to be extracted. This avoids premature extraction, which could cause local collapse at the corresponding pile hole and affect the concrete pouring, resulting in the concrete in the pile hole at the corresponding depth being mixed with soil and other debris, affecting the strength. The best approach is to pull the section while it is being poured, ensuring that the area in the pile hole that has not yet been filled with concrete is always supported by the corresponding standard section during the concrete pouring process.

[0029] In the above embodiments, the integrated wall retaining structure assembly and disassembly machine can be designed as follows to improve construction efficiency: This integrated wall retaining structure assembly and disassembly machine, as shown... Figure 12As shown, the system specifically includes a smooth-surfaced base plate 18 for the standard section to be placed upright, with the base plate 18 lying flat on the ground near the rectangular pile hole. It also includes a drive chamber 19 located above the base plate 18 and connected to a mechanical arm, which can move the drive chamber 19 to a corresponding position directly above the rectangular pile hole. The drive chamber 19 contains a cross-shaped, vertically arranged, meshing hollow worm gear 20 and hollow worm 21, each rotatably mounted within the drive chamber 19. Specifically, it can be configured as follows... Figure 12 As shown, it is rotatably mounted in the drive chamber 19 via bearings 22 at both ends. Two studs 24 with opposite directions of rotation are coaxially threaded into the hollow worm gear 20 and hollow worm 21, so that when the hollow worm gear 20 and hollow worm 21 rotate, the corresponding studs 24 move closer or further apart. Furthermore, an L-shaped snap plate 23 is fixed to the free end of each stud 24. The two inner sidewalls of the snap plate 23 can respectively adhere to the inner sidewall and top surface of the standard section, contacting and positioning it. This ensures that when the worm gear drives the transmission, all snap plates 23 contact and engage with the corresponding parts of the standard section, clamping and positioning the standard section. After the mechanical arm rotates to a set angle, it quickly and accurately places the standard section directly above the rectangular pile hole for assembly. In practical use, a wing plate 35, as shown in the figure, can be fixed on each of the top two sides of the buckle plate 23. The bottom surface of the wing plate 35 is the same thickness as and coplanar with the horizontal section of the buckle plate 23. As an extension of the buckle plate 23, the purpose of the wing plate 35 is mainly to facilitate initial contact with the top surface of the standard section, thereby facilitating smooth transmission of the screw mechanism formed by the buckle plate 23 based on the stud 24. That is, the buckle plate 23 moves from the inside of the standard section towards the inner wall. The wing plate 35 can better limit and guide, allowing the standard section to be placed more freely on the base plate 18 initially, as long as the wing plate 35 can cover and contact the top surface of the standard frame. More specifically, as shown in the figure... Figure 12 , Figure 13 The top of the buckle plate 23 is fixed with an L-shaped curved beam 25. The curved beam 25 and the stud 24 are coaxially connected via a first connecting ring 26 and a second connecting ring 27, which are respectively coaxially fixed. The first connecting ring 26 has a coaxially arranged... Figure 15 The annular guide groove 2601 shown has several threaded holes arranged in an annular array on the mating end face of the second connecting ring 27. A bolt-shaped stud 28 is slidably installed within the annular guide groove 2601. A locking assembly 29 is installed after the threaded end of the stud 28 protrudes from the threaded hole. Figure 14 The locking assembly 29 can be a commonly used hexagonal nut, and the cap end of the bolt 28 is slidably located in the annular guide groove 2601 so that, under appropriate working conditions, the first connecting ring 26, with the curved beam 25, rotates relative to the second connecting ring 27 and disengages from the integrated synchronous transmission connection.

[0030] The wall retaining structure assembly and disassembly machine in this construction method also includes a high-compression spring 30. The high-compression spring 30 has excellent compression resistance. Its two ends are located within the end faces of two connecting rings and can move freely axially. Specifically, one end can be installed on... Figure 15 The first end is installed in an annular mounting groove 2602, and the second end is installed in the end face of the second connecting ring 27. Here, the tightening amount of the locking kit 29 is such that when the two opposing snap plates 23 have not yet fully contacted the corresponding parts of the standard section, that is, when the stud 24 is allowed to continue axial movement, the two connecting rings form an integral structure. The snap plates 23, the curved beam 25, and the stud 24 form a whole. However, when the two opposing snap plates 23 have fully contacted the corresponding parts of the standard section, the stud 24 cannot continue to move in the screw mechanism. Therefore, the two connecting rings will eventually rotate relative to each other and slip to avoid affecting the rotation of another component (the hollow worm gear 20 or the hollow worm 21). The main purpose of the above design is to ensure that each snap plate 23 fully contacts and fits the corresponding parts of the standard frame for positioning and clamping. In addition, special attention should be paid to the fact that if it is necessary to adjust the compression of the high-pressure spring 30 to change the critical torque required for the relative rotation of the two connecting rings, thereby controlling the adjustment of the compression strength of the buckle plate 23 on the standard section, the first connecting ring 26 and the second connecting ring 27, as well as the end face of the bent beam 25 and the stud 24, should not be in direct contact, but should have an axial gap so that the two can be brought closer together. Moreover, it is best to connect a washer 31 to each end of the high-pressure spring 30 so that the two connecting rings can be more stable and reliable when they rotate relative to each other.

[0031] like Figure 16 As shown, the locking assembly 29 is a cylindrical gear, and the gear hole is a threaded hole that mates with the threaded bolt 28. An adjusting ring sleeve 32 is coaxially rotatably mounted on the outer sides of the two connecting rings, as shown... Figure 16 As shown in the structure, the adjusting ring 32 and the two connecting rings cannot move axially, but can only rotate. One end of the adjusting ring 32 has an internal gear 3201 that meshes with all the cylindrical gears, so that when the adjusting ring 32 is rotated, all locking components 29 can be tightened synchronously. This internal gear 3201 transmission design ensures that the locking components 29, when driven by the threaded pair, have the ability to rotate on their own axis while moving axially relative to the bolt 28. It also evenly compresses the end of the high-pressure spring 30, improving reliability and preventing instability in elastic force transmission caused by inconsistent axial displacement of the locking components 29, which would affect the stability of relative rotation. In engineering applications, a fixed driving time is generally set for the equipment driving the worm gear mechanism. Within this time, it is sufficient for all scrapers to contact and position with the standard section.

[0032] In addition, to ensure that the adjusting ring 32 does not become too loose during rotation, it can be as follows: Figure 16As shown, a compressed elastic washer 33 is also sandwiched between the end face of the adjusting ring sleeve 32 and one of the connecting rings, so that the adjusting ring sleeve 32 has a preload relative to the connecting ring, and the elastic washer 33 can be used as follows: Figure 17 As shown, the hollow structure facilitates compression, provides better elasticity, and increases strength. Finally, the other end of the adjusting ring sleeve 32 is axially pressed and fixed by a pressure ring 34 that is threaded into the end face of another connecting ring. Once the elastic force of the two connecting rings is set in place, the pressure ring 34 can be tightened.

[0033] It should be clarified here that, in this specification, terms such as "first" and "second" are merely used to distinguish one feature from another, and do not imply any inherent relationship or order between these technical features. The terms "comprising" and "including" mean that something contains one or more technical means or features, specifically referring to other existing or non-existent technical features not listed above. The descriptions in the above embodiments are merely representative examples for the purposes of this invention and are not the only limiting features. Those skilled in the art should understand that, without departing from the technical content described in all claims of this application, simple substitutions and modifications can be made to create different or equivalent specific embodiments and application scenarios. However, regardless of these adaptive changes, all such embodiments must fall within the protection scope of this invention.

Claims

1. A composite rectangular pile hole retaining wall, characterized in that: It includes several standard segments that are all rectangular shell-shaped and a cutting edge assembly. The cutting edge assembly includes a standard segment and a rectangular cutting edge (11) that is coaxially fixed to the bottom end of the standard segment. The standard section includes an upper socket (1) and a lower connector (2) located at the four corners of the upper and lower ends respectively. The standard section also includes two parallel and spaced-apart wall panels, which are fixed together by a frame (8). Each of the lower connectors (2) is equipped with several hooks (3) that are elastically rotated by torsion springs (13). The upper socket (1) is equipped with several pins (4) that are the same number as the hooks (3). The pins (4) are fixed between the two wall panels in a direction perpendicular to the wall panels. When two adjacent standard sections are joined together, the cylindrical surfaces of the hooks (3) and the pins (4) are pressed and contacted and swing to one side so that the hooks (3) are not blocked by the pins (4) during the downward movement. When the two joined standard sections are separated, the hooks (3) can hook the pins (4) so ​​that the two standard sections move upward together synchronously.

2. The combined rectangular pile hole retaining wall according to claim 1, characterized in that: Each wall panel is formed by several rectangular plate-shaped interlocking plates (23) and right-angled corner plates in sequence, and is detachably fixed to the frame (8) as a whole; The frame (8) consists of a rectangular grid frame, vertical rectangular tubes (9) and hollow longitudinal beams (10) with an L-shaped cross-section. The grid frame is located in the center of the two wall panels. Several vertically arranged vertical rectangular tubes (9) are installed on both sides of the grid frame. The vertical rectangular tubes (9) are connected to the longitudinal beams (10) located at the four corners to form a rectangular frame structure. The locking plate (23) is fixedly connected to the vertical rectangular tubes (9) by fixing pins (5).

3. The combined rectangular pile hole retaining wall according to claim 1, characterized in that: Each pair of pins (4) is provided in each of the upper bearing sockets (1), and each pair of pins (4) is arranged perpendicular to each other between the corresponding two wall plates.

4. The combined rectangular pile hole retaining wall according to claim 1, characterized in that: At each of the four corners of the two wall panels, there are three vertically arranged rectangular tubes fixed to form a longitudinal beam (10). The three rectangular tubes in the longitudinal beam (10) are integrally formed in a triangular shape. The upper socket (1) and the lower socket (2) are located at the upper and lower ends of the longitudinal beam (10), respectively. The two ends of the hinge shaft (12) of the hook (3) are rotatably installed in the rectangular structural holes (1001) on both sides of the right-angle region of the longitudinal beam (10). The torsion spring (13) is coaxially sleeved on the hinge shaft (12). One end of the torsion spring (13) is connected to the inner wall of the rectangular structural hole (1001), and the other end is connected to the side of the hook (3) fixed on the hinge shaft (12). The bottom end of the hook (3) is a hook-shaped structure (311) that bends upward, and the top end is a vertical hook handle (312). The top end of the hook handle (312) is vertically fixed to the hinge shaft (12), and the torsion spring (13) makes the hook handle (312) vertically set.

5. A combined rectangular pile hole retaining wall according to claim 1, characterized in that: At each of the four corners of the two wall panels, there are three vertically arranged rectangular tubes fixed to form a longitudinal beam (10), and the three rectangular tubes in the longitudinal beam (10) are integrally formed in a triangular shape. The hook (3) includes a hanging rod (16) fixed in a centrally recessed arc-shaped groove (1601), and a bearing shaft (14) fixed in rectangular structural holes (1001) on both sides of the right-angle region of the longitudinal beam (10). The arc-shaped groove (1601) of the hanging rod (16) is used to hook the pin (4) in the standard section that it mates with. The bearing shaft (14) and the corresponding pin (4) are arranged vertically and perpendicular to each other. (14) has a П-shaped suspension frame (15) fixed at one end, and the other end can rest on the bearing block (17) fixed on the wall of the rectangular structural hole (1001); the suspension frame (15) has one end of the hanging rod (16) rotatably installed at the bottom center, and the front and rear sides of the end of the hanging rod (16) are each provided with the torsion spring (13) sleeved on the suspension frame (15), so that the non-bending section of the hanging rod (16) under normal conditions can be parallel to the bearing shaft (14).

6. A method for constructing retaining walls for rectangular pile holes, characterized in that, Construction is carried out using the combined rectangular pile hole retaining wall as described in any one of claims 1-5, and the specific operation is as follows: S1. After determining the location of the rectangular pile hole, use the wall-mounting and dismantling machine to align the four corners of the cutting edge assembly with the four corners of the rectangular pile hole and press it vertically into the soil layer. After excavating to a set depth in the inner area of ​​the cutting edge assembly, lift the standard section using the wall-mounting and dismantling machine. Use the lower plug (2) to insert into the corresponding upper socket (1) to achieve vertical series splicing of two adjacent standard sections, so that the standard section and the cutting edge assembly are connected to form a rectangular overall wall placed on the ground. S2. Continue to excavate the soil within the rectangular pile hole area within the standard section. As the excavation of the rectangular pile hole progresses, the subsequent standard sections are pressed in one by one for assembly and splicing. During assembly and splicing, when the current top standard section is about to be buried in the soil layer, the next standard section is hoisted and combined with it, and the soil is excavated again. This process is repeated until the pile hole is excavated to the design depth. S3. After the rectangular pile hole is dug, during the process of pouring concrete into the pile hole, while pouring concrete downwards, the corresponding standard section is pulled upwards using the wall installation and dismantling machine. After the soil layer is pulled out at the connection of the two standard sections, the pin (4) is pulled out, and the previous standard section can be removed. Then, the subsequent standard sections are pulled out until all the wall is pulled out.

7. A method for constructing a rectangular pile hole retaining wall according to claim 6, characterized in that, During the process of pulling out the standard section, the wall-mounting and dismantling machine will only pull out the standard section after all or part of the concrete has been poured into it.

8. A method for constructing a rectangular pile hole retaining wall according to claim 6, characterized in that, The wall-mounting and dismantling integrated machine includes a smooth base plate (18) for standard sections to be placed upright, with the base plate (18) lying flat on the ground; It also includes a drive chamber (19) located above the base plate (18) and connected to the mechanical arm. The drive chamber (19) has a hollow worm gear (20) and a hollow worm (21) arranged in a cross shape and meshing with each other. Two studs (24) with opposite directions of rotation are coaxially threaded in the hollow worm gear (20) and the hollow worm (21). Each stud (24) has an L-shaped buckle plate (23) fixed to its free end. The two inner sidewalls of the buckle plate (23) can be attached to the inner sidewall and top surface of the standard section respectively, so that when the worm gear is driven, all buckles (23) are in contact with the corresponding part of the corresponding standard section, and the standard section is clamped and positioned. After the mechanical arm rotates to a set angle, it places the standard section directly above the rectangular pile hole.

9. A method for constructing a retaining wall for a rectangular pile hole according to claim 8, characterized in that, The top of the buckle plate (23) is fixed with an L-shaped curved beam (25), and the curved beam (25) and the stud (24) are coaxially connected by a first connecting ring (26) and a second connecting ring (27) that are respectively coaxially fixed; wherein, The first connecting ring (26) has an annular guide groove (2601) coaxially provided on the mating end face, and the second connecting ring (27) has a number of screw holes arranged in an annular array on the mating end face. A bolt-shaped stud (28) is slidably installed in the annular guide groove (2601). After the threaded end of the stud (28) passes through the screw hole, a locking kit (29) is installed, and its cap end is slidably located in the annular guide groove (2601). It also includes a high-pressure spring (30), the two ends of which are located in the end faces of the two connecting rings respectively, and can move freely axially. The tightening amount of the locking kit (29) is such that when the two buckles (23) facing each other have not yet fully contacted the corresponding parts of the standard section, the two connecting rings form an integral structure, and when the two buckles (23) facing each other have fully contacted the corresponding parts of the standard section, the two connecting rings rotate relative to each other.

10. A method for constructing a rectangular pile hole retaining wall according to claim 9, characterized in that, The locking assembly (29) is a cylindrical gear, and the gear hole is a threaded hole that engages with the bolt (28). An adjusting ring sleeve (32) is rotatably mounted coaxially on the outer side of the two connecting rings. The adjusting ring sleeve (32) and the two connecting rings cannot move axially. The inner wall of one end of the adjusting ring sleeve (32) is an internal gear (3201) that meshes with all the cylindrical gears, so that when the adjusting ring sleeve (32) is rotated, all locking assemblies (29) can be tightened synchronously. A compressed elastic washer (33) is also sandwiched between the adjusting ring sleeve (32) and the end face of one of the connecting rings, so that the adjusting ring sleeve (32) has a preload relative to the connecting ring. The other end of the adjusting ring sleeve (32) is axially pressed and fixed by a pressure ring (34) that is threaded into the end face of the other connecting ring.

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