A large-diameter pile dry operation hole-forming retaining wall device

Abstract

The application provides a large-diameter pile dry operation hole-forming retaining wall device, and belongs to the technical field of pile foundation engineering. The device comprises splicing blocks, a guide plate, two clamping plates and a locking mechanism. The splicing blocks are installed between two face plates. The guide plate is fixedly installed on the back of the splicing blocks and horizontally arranged and provided with a guide inclined surface. The two clamping plates are fixedly arranged on the two sides of the splicing blocks and used for connecting the two adjacent face plates. The locking mechanism is installed on the back of the splicing blocks and located on the upper side or the lower side of the guide plate. Two elastic bodies arranged in the horizontal direction are arranged on the locking mechanism. The ends of the two elastic bodies protrude out of the two sides of the splicing blocks, and the ends of the elastic bodies are provided with inclined extrusion surfaces. The large-diameter pile dry operation hole-forming retaining wall device provided by the application improves the safety of the pile hole retaining wall, effectively resists the lateral pressure of loose soil layers and avoids the collapse of the hole wall caused by the loosening of the retaining wall device.

Description

Technical Field

[0001] This application belongs to the field of pile foundation engineering technology, and more specifically, relates to a device for dry drilling and wall protection of large-diameter piles. Background Technology

[0002] During pile foundation construction, when the construction site is narrow and the height of the pile-driving operation space is limited, traditional large-scale pile-driving equipment cannot be used, making small-scale pile-driving equipment the inevitable choice. Small-scale pile-driving equipment primarily uses manual excavation, motorized Luoyang shovel drilling, or spiral sand cylinder drilling for hole formation. When encountering loose soil layers within the drilled depth, the pile hole needs to be protected. Traditionally, this protection method mainly uses manually cast-in-place concrete, with workers operating inside the pile hole. This traditional method has the following problems: (1) Loose soil layers have poor soil stability, and the pile hole wall is unstable during the protection process, which can easily cause the pile hole to collapse; (2) When using artificial cast-in-place reinforced concrete retaining walls, workers must work inside the pile hole, and the collapse of the pile hole can easily cause personal injury and safety accidents. (3) After the cast-in-place reinforced concrete retaining wall is completed, concrete curing is required. Before the concrete strength reaches the requirements of the retaining wall, pile hole construction cannot be carried out, resulting in a long construction period. Utility Model Content

[0003] The purpose of this application is to provide a large-diameter pile dry drilling and wall protection device to solve the technical problems of safety hazards and insufficient stability of the wall protection operation in existing pile foundation engineering.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a device for dry drilling and wall protection of large-diameter piles, comprising: Interlocking blocks are used to install between two panels; A guide plate is fixedly installed on the back of the splicing block; the guide plate is horizontally arranged and has a guide ramp for guiding movement; Two mounting plates are fixed to both sides of the splicing block; the two mounting plates are used to connect to two adjacent panels. A locking mechanism is installed on the back of the splicing block and located on the upper or lower side of the guide plate; the locking mechanism is provided with two elastic bodies arranged in a horizontal direction, the ends of the two elastic bodies protruding beyond the two sides of the splicing block, and the ends of the elastic bodies are provided with inclined extrusion surfaces.

[0005] In one possible implementation, the guide plate has a trapezoidal structure, and there are two guide ramps, which are respectively located on both sides of the guide plate.

[0006] In one possible implementation, the two clamping plates are located on both sides of the guide plate, and the two clamping plates are integrally formed with the guide plate to form a limiting plate.

[0007] In one possible implementation, the splicing block includes a plurality of pads arranged vertically and a number of fasteners, and the limiting plate is clamped between two of the pads; both the pads and the limiting plate are provided with through-holes, and the fasteners pass through the through-holes on the pads and the limiting plate to fix the plurality of pads and the limiting plate; the locking mechanism is installed on the limiting plate or the pads.

[0008] In one possible implementation, the fastener includes a tie bolt and a plurality of lock nuts threaded onto the tie bolt.

[0009] In one possible implementation, the locking mechanism includes two vertically arranged and horizontally positioned support bodies, each with an inwardly extending guide hole on its opposite end face, and the two elastic bodies are slidably connected in the guide holes.

[0010] In one possible implementation, the two carriers are respectively disposed on the upper and lower sides of the guide plate.

[0011] In one possible implementation, both sides of the splicing block are provided with inclined mating surfaces, and the back dimension of the splicing block is smaller than the front dimension of the splicing block.

[0012] In one possible implementation, there are multiple guide plates arranged at vertical intervals; there are multiple locking mechanisms, each corresponding to one of the multiple guide plates.

[0013] In one possible implementation, two panels are also included, each with an inwardly recessed slot on an adjacent side, and the two plates are fitted into the slots.

[0014] The beneficial effects of the large-diameter pile dry drilling and wall protection device provided in this application are as follows: Compared with the prior art, the large-diameter pile dry drilling and wall protection device of this application, during operation, firstly prefabricates splicing blocks, panels, and supporting components according to the pile hole diameter to ensure that the dimensions match the pile hole; arranges multiple panels in a ring, and arranges multiple splicing blocks in a ring inside the multiple panels; then uses equipment such as a crane to install the multiple panels and multiple splicing blocks as a whole at the center of the pile hole from top to bottom; then applies a radial force outward from the center of the multiple splicing blocks to push the multiple splicing blocks outward; as the multiple splicing blocks move outward, under the action of the guide plate... Multiple splicing blocks act on two corresponding panels, causing the panels to move towards the pile hole wall. As the panels move, a certain gap is formed between adjacent panels, allowing the splicing blocks to gradually move into the gap between the two panels. When the inclined pressing surface of the locking mechanism contacts the panel, the elastic body is forced to retract inward, allowing it to move smoothly to the outside of the panel. The elastic body returns to its original position and locks onto the outside of the panel, while two locking plates respectively lock into the two panels, completing the connection between the splicing blocks and the corresponding two panels. At this point, multiple splicing blocks and multiple panels form a ring-shaped protective wall device acting on the inner wall of the pile hole. In this way, the splicing blocks and panels are installed together into the pile hole and driven to move radially, thus completing the protective wall work of the pile hole without requiring personnel to enter the pile hole, improving the safety of the pile hole protective wall. Furthermore, the locking plates and locking mechanism form a stable connection structure between the splicing blocks and the two adjacent panels, effectively resisting the lateral pressure of loose soil layers and preventing the protective wall device from loosening and causing the hole wall to collapse. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the large-diameter pile dry drilling and wall protection device provided in the embodiments of this application; Figure 2 A partial connection diagram of the large-diameter pile dry drilling and wall protection device provided in the embodiments of this application. Figure 1 ; Figure 3 A partial connection diagram of the large-diameter pile dry drilling and wall protection device provided in the embodiments of this application. Figure 2 ; Figure 4 This is a schematic diagram of the panel structure provided in an embodiment of this application; Figure 5 A schematic diagram showing the usage status of the large-diameter pile dry drilling and wall protection device provided in the embodiments of this application.

[0017] The following are the labeling elements in the figure: 10. Interlocking block; 11. Spacer block; 12. Fastener; 13. Connecting hole; 14. Tie bolt; 15. Locking nut; 16. Mating surface; 20. Guide plate; 21. Guide ramp; 22. Limiting plate; 30. Clamping plate; 40. Locking mechanism; 41. Elastomer; 42. Inclined extrusion surface; 43. Bearing body; 44. Guide hole; 50. Panel; 51. Slot. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0019] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0022] Please see Figures 1 to 5The present application describes a device for dry drilling and wall protection for large-diameter piles. The device includes a splicing block 10, a guide plate 20, a clamping plate 30, and a locking mechanism 40. The splicing block 10 is installed between two panels 50. The guide plate 20 is fixedly installed on the back of the splicing block 10. The guide plate 20 is horizontally arranged and has a guide slope 21 for guiding movement. Two clamping plates 30 are fixedly installed on both sides of the splicing block 10. The two clamping plates 30 are used to connect with two adjacent panels 50. The locking mechanism 40 is installed on the back of the splicing block 10 and is located above or below the guide plate 20. The locking mechanism 40 has two horizontally arranged elastic bodies 41, the ends of which protrude beyond the sides of the splicing block 10, and the ends of the elastic bodies 41 have inclined pressing surfaces 42.

[0023] Compared with the prior art, the large-diameter pile dry drilling and wall protection device provided in this application uses the splicing block 10 as the core connector to connect two panels 50 to form a wall protection unit, which is the load-bearing foundation of the entire structure. The guide plate 20 is horizontally fixed on the back of the splicing block 10, and its guide slope 21 can guide the splicing block 10 to move accurately during installation, avoiding the panel 50 from not fitting tightly with the splicing block 10 due to operational deviations, thus laying the foundation for subsequent stable wall protection. Two clamping plates 30 are respectively fixed to the splicing block. Both sides of the body 10 can form a rigid connection with the adjacent panel 50, initially constructing a protective frame to prevent the panel 50 from shifting under the pressure of loose soil. The locking mechanism 40 is installed on the back of the splicing block 10 and located above and below the guide plate 20. The ends of the two horizontally arranged elastic bodies 41 protrude from both sides of the splicing block 10. The ends of the elastic bodies 41 pass smoothly through the two panels 50 with the help of two inclined extrusion surfaces 42, so that the two ends of the elastic bodies 41 act on the outer side of the two adjacent panels 50 respectively, realizing a tight and reliable connection between the splicing structure and the panel 50.

[0024] During operation, firstly, prefabricate the splicing blocks 10, panels 50, and supporting components according to the pile hole diameter, ensuring that the dimensions match the pile hole. Arrange multiple panels 50 in a ring, and arrange multiple splicing blocks 10 in a ring inside the panels 50. Then, using a crane or other equipment, install the panels 50 and splicing blocks 10 as a whole at the center of the pile hole from top to bottom. Next, apply a radial force outward from the center of the splicing blocks 10 to push them outward. As the splicing blocks 10 move outward, under the action of the guide plate 20, each splicing block 10 acts on two corresponding panels 50, thus causing the panels 50 to face the pile hole. The hole wall moves; and as the panel 50 moves, a certain gap is formed between two adjacent panels 50, thereby causing the splicing block 10 to gradually move into the gap between the two panels 50; when the inclined pressing surface 42 contacts the panel 50, the elastic body 41 on the locking mechanism 40 is forced to retract inward, so that the elastic body 41 moves smoothly to the outside of the panel 50; the elastic body 41 returns to its original position and is locked on the outside of the panel 50, while the two locking plates 30 are respectively locked into the two panels 50, completing the connection between the splicing block 10 and the corresponding two panels 50; at this time, multiple splicing blocks 10 and multiple panels 50 form an annular protective wall device acting on the inner wall of the pile hole. In this way, the splicing block 10 and the panel 50 are installed together into the pile hole and driven to move radially, thereby completing the wall protection work of the pile hole. There is no need for personnel to enter the pile hole, which improves the safety of the pile hole wall protection. In addition, with the help of the clamping plate 30 and the locking mechanism 40, the splicing block 10 and the two adjacent panels 50 form a stable connection structure, which can effectively resist the lateral pressure of the loose soil layer and prevent the wall protection device from loosening and causing the hole wall to collapse.

[0025] Preferably, an airbag is installed at the center of the multiple interlocking blocks 10, and the airbag is connected to a high-pressure air source. During operation, the high-pressure air source is turned on to inflate the airbag, causing it to expand radially outward, forming a flexible, outward-expanding structure that drives the multiple interlocking blocks to move outward. A horizontal plate is pre-installed inside the multiple interlocking blocks 10, and a central rod is fixedly installed on the horizontal plate. The airbag is then fitted onto the central rod, ensuring that the outward expansion force is evenly distributed across the multiple interlocking blocks 10 when the airbag expands.

[0026] Please see Figures 1 to 3 As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, the guide plate 20 has a trapezoidal structure and two guide slopes 21, which are respectively arranged on both sides of the guide plate 20. The trapezoidal guide plate 20 has two symmetrically arranged guide slopes 21, so that the splicing block 10 can slide synchronously and smoothly along the guide slopes 21 on both sides, the force is more balanced, and the position displacement caused by unilateral force is avoided. It can quickly and accurately align with the adjacent panel 50, reducing the process of repeated adjustment.

[0027] Please see Figures 1 to 5 As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, two clamping plates 30 are respectively located on both sides of the guide plate 20, and the two clamping plates 30 and the guide plate 20 are integrally formed to form a limiting plate 22; the two clamping plates 30 are respectively set on both sides of the guide plate 20, and the three are integrally formed to form a complete limiting plate 22, abandoning the traditional separate assembly design and forming a unified force-bearing and limiting carrier. Its advantage is that the integral molding eliminates the splicing gaps between components, greatly improves the overall strength and deformation resistance of the structure, and avoids the problem of easy loosening of separate connections; at the same time, the symmetrically distributed clamping plates 30 can work together with the guide plate 20 to make the splicing block 10 more evenly stressed, accurately connect the adjacent panel 50, and reduce installation deviation.

[0028] Please see Figures 1 to 3 , Figure 5 As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, the splicing block 10 includes multiple pads 11 arranged vertically and several fasteners 12, and a limiting plate 22 is clamped between two pads 11; both the pads 11 and the limiting plate 22 are provided with through-hole connecting holes 13, and the fasteners 12 pass through the connecting holes 13 on the pads 11 and the limiting plate 22 to fix the multiple pads 11 and the limiting plate 22; the locking mechanism 40 is installed on the limiting plate 22 or the pads 11. The splicing block 10 adopts a modular combination design, consisting of multiple vertically arranged pads 11, several fasteners 12, and a limiting plate 22 clamped between the pads 11. Both the pads 11 and the limiting plate 22 are provided with through-hole connecting holes 13, and the three are fixed by the fasteners 12 passing through the holes, and the locking mechanism 40 can be flexibly installed on the limiting plate 22 or the pads 11. Fastener 12 provides through-fixation, forming a rigid whole between pad 11 and limiting plate 22, avoiding the loosening problems that easily occur with separate connections, and significantly improving the overall rigidity and deformation resistance of the spliced ​​block 10; the locking mechanism 40 has a flexible installation position and can be adjusted according to the on-site construction space and soil pressure conditions, reducing operational limitations. The overall rigidity improvement further enhances the wall protection device's resistance to loose soil layers, ensuring the stability of the pile hole.

[0029] Please see Figures 1 to 5As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, the fastener 12 includes tie bolts 14 and multiple locking nuts 15 threaded onto the tie bolts 14. The tie bolts 14, as the main load-bearing components, pass through the connection holes 13 between the pads 11 and the limiting plate 22. The multiple locking nuts 15 are threaded onto both ends of the bolts, forming a multi-point distributed locking layout. The tie bolts 14 can provide stable bidirectional tensile force, avoiding the problem of loosening due to soil pressure when fixed in one direction. The locking nuts 15 can flexibly adjust the locking position according to the stacking thickness of the pads 11, ensuring that the pads 11 and the limiting plate 22 are tightly fitted without gaps. Moreover, the threaded connection does not require complex tools, facilitating quick on-site disassembly and assembly and fine-tuning.

[0030] Please see Figures 1 to 3 As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, the locking mechanism 40 includes two vertically arranged and horizontally positioned support bodies 43. Each support body 43 has an inwardly extending guide hole 44 on its opposite end face. Two elastic bodies 41 are slidably connected in the guide holes 44. The locking mechanism 40 is based on two vertically arranged horizontally positioned support bodies 43. Each support body 43 has an inwardly extending guide hole 44 on its opposite end face. The elastic bodies 41 are slidably connected in the corresponding guide holes 44, forming a vertically symmetrical sliding limit structure, clearly constraining the extension and retraction direction of the elastic bodies 41. The guide holes 44 can precisely limit the sliding trajectory of the elastic bodies 41, ensuring that the inclined end pressing surface 42 is always aligned with the panel 50. The vertically symmetrical layout of the support bodies 43 allows the elastic bodies 41 to receive more balanced force, simultaneously applying stable pressing force to the panel 50, preventing wall loosening caused by unilateral force. The elastic body 41 includes a spring and a long slider installed from the inside out in the guide hole 44.

[0031] Please see Figure 1 and Figure 5 As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, two bearing bodies 43 are respectively arranged on the upper and lower sides of the guide plate 20, forming a symmetrical layout centered on the guide plate 20, so that the guiding structure and the locking mechanism 40 are tightly integrated in space and do not interfere with each other. With the help of the existing installation benchmark of the guide plate 20, the installation position of the bearing body 43 can be quickly determined, avoiding the problem of inaccurate contact between the elastic body 41 and the panel 50 due to the positioning deviation of the bearing body 43; at the same time, the symmetrical layout makes the two bearing bodies 43 more evenly stressed, which can drive the elastic body 41 to apply compressive force to the panel 50 from both the upper and lower directions, making it more stable when offsetting the lateral pressure of loose soil layers.

[0032] Please see Figure 1 , Figure 4 and Figure 5As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, the splicing block 10 has inclined mating surfaces 16 on both sides, and the back dimension of the splicing block 10 is smaller than the front dimension. The inclined mating surfaces 16 can form a tight inclined fit with the panel 50 and the splicing block 10, increasing the contact area while eliminating gaps and preventing loose soil from seeping in through the gaps. The smaller back and larger front dimension design reduces installation resistance, making it easier to guide the splicing block 10 into the inner wall of the pile hole without repeated position adjustments. This structure improves the sealing performance and overall rigidity of the wall protection device, enhances its resistance to lateral pressure from loose soil, and prevents the hole wall from collapsing.

[0033] Please see Figures 1 to 3 , Figure 5 As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, there are multiple guide plates 20, arranged vertically at intervals; there are multiple locking mechanisms 40, each corresponding to one of the multiple guide plates 20; the multiple guide plates 20 arranged vertically at intervals, and the number of locking mechanisms 40 corresponding to one of the guide plates 20, form a vertically distributed guiding and locking collaborative unit, allowing the guiding and locking functions to achieve multi-point coverage in the vertical direction. Multiple sets of guide plates 20 can synchronously guide the installation of the splicing block 10 from different heights, avoiding the tilting and offset problems that are prone to occur in single-point guidance, and ensuring that the splicing block 10 and the panel 50 are precisely fitted throughout the process; the one-to-one corresponding locking mechanisms 40 can apply balanced compressive force to the panel 50 from multiple vertical heights.

[0034] Please see Figure 4 and Figure 5 As a specific embodiment of the large-diameter pile dry drilling and wall protection device provided in this application, it also includes two panels 50. Each of the two panels 50 has an inwardly recessed groove 51 on its adjacent side. Two clamping plates 30 are installed in conjunction with the two grooves 51. The grooves 51 provide a clear installation positioning reference for the clamping plates 30, guiding them to quickly and accurately embed, avoiding offset errors during manual alignment. Simultaneously, the interlocking structure significantly increases the contact area between the clamping plates 30 and the panels 50, improving connection rigidity and preventing relative misalignment between the panels 50 and the splicing block 10. This wall protection method further enhances the overall stability of the wall protection device and reduces the potential for wall protection failure due to loose connections.

[0035] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dry walling device for forming a hole for a large diameter pile, characterized in that, include: Interlocking blocks are used to install between two panels; A guide plate is fixedly installed on the back of the splicing block; the guide plate is horizontally arranged and has a guide ramp for guiding movement; Two mounting plates are fixed to both sides of the splicing block; the two mounting plates are used to connect to two adjacent panels. A locking mechanism is installed on the back of the splicing block and located on the upper or lower side of the guide plate; the locking mechanism is provided with two elastic bodies arranged in a horizontal direction, the ends of the two elastic bodies protruding beyond the two sides of the splicing block, and the ends of the elastic bodies are provided with inclined extrusion surfaces.

2. The large-diameter pile dry drilling and wall protection device as described in claim 1, characterized in that, The guide plate has a trapezoidal structure, and there are two guide ramps, which are respectively located on both sides of the guide plate.

3. A wall of protection for dry work in the excavation of a hole for a large diameter pile according to claim 2, characterized in that The two clamping plates are located on both sides of the guide plate, and the two clamping plates are integrally formed with the guide plate to form a limiting plate.

4. A wall of protection for dry excavation of holes for large diameter piles as claimed in claim 3, characterized in that, The splicing block includes multiple pads arranged vertically and several fasteners, and the limiting plate is clamped between two of the pads; both the pads and the limiting plate are provided with through-holes, and the fasteners pass through the through-holes on the pads and the limiting plate to fix the multiple pads and the limiting plate; the locking mechanism is installed on the limiting plate or the pads.

5. A wall of protection for dry work in the excavation of a hole for a large diameter pile according to claim 4, characterized in that The fasteners include tie bolts and a plurality of lock nuts threaded onto the tie bolts.

6. A wall of protection for dry work in the excavation of a hole for a large diameter pile according to claim 1, characterized in that The locking mechanism includes two horizontally arranged carriers arranged vertically. Each carrier has an inwardly extending guide hole on its opposite end face. The two elastic bodies are slidably connected in the guide holes.

7. A wall of protection for dry work in the excavation of a hole for a large diameter pile according to claim 6, characterized in that The two carriers are respectively disposed on the upper and lower sides of the guide plate.

8. A wall proctor for dry hole formation of a large diameter pile according to claim 1, wherein Both sides of the splicing block are provided with inclined mating surfaces, and the back dimension of the splicing block is smaller than the front dimension of the splicing block.

9. A wall proctor for dry hole making of a large diameter pile according to claim 1, wherein The number of guide plates is multiple, and they are arranged at intervals. The number of locking mechanisms is multiple, and they correspond one-to-one with the multiple guide plates.

10. A wall proctor for dry hole making of a large diameter pile, according to any one of claims 1 to 9, characterized in that, It also includes two panels, each with an inwardly recessed slot on the side of the two panels that are close to each other, and the two plates are installed in conjunction with the two slots.

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