Anti-floating control device for underground building

Abstract

The utility model relates to underground building anti -floating control technical field, concretely is a kind of underground building anti -floating control device to solve and surrounding soil friction insufficient, anti -floating ability limited problem, greatly promote the friction of pile body and soil, guarantee anti -floating ability, including the pile rod for inserting into pile hole, wave form support block is installed on the pole of pile rod, the lower end of the pile rod is equipped with guide slot, slidingly connected with movable rod in the guide slot, the lower end of movable rod is connected with pile head;The pile rod is equipped with centering mechanism on the outside close to lower end, when movable rod relatively the pile rod moves upward, the centering mechanism expands outward and is centrally supported in pile hole.

Description

Technical Field

[0001] This utility model relates to the field of anti-buoyancy control technology for underground buildings, specifically an anti-buoyancy control device for underground buildings. Background Technology

[0002] When the groundwater level rises, the groundwater exerts an upward buoyancy force on underground building structures. When this buoyancy force exceeds the structure's own weight and the resistance provided by other anti-buoyancy measures, the underground building structure will float, leading to structural deformation, cracking, or even failure. Therefore, anti-buoyancy treatment is necessary. Increasing the weight of the underground building structure itself to resist buoyancy is a common anti-buoyancy measure, and installing anti-buoyancy piles in the foundation is a key approach. Depending on the geological conditions and anti-buoyancy requirements, different types of anti-buoyancy piles can be selected, such as bored piles and prestressed concrete pipe piles.

[0003] During the installation of anti-buoyancy piles, the piles provide downward tension through the friction between the pile body and the surrounding soil, as well as the end resistance, to balance the buoyancy of groundwater. However, existing anti-buoyancy piles often have multiple barbed rods on the pile body, which limits the friction between the pile and the surrounding soil, thus limiting their anti-buoyancy capacity. Utility Model Content

[0004] This utility model provides an anti-buoyancy control device for underground structures to solve the problem of insufficient friction with the surrounding soil and limited anti-buoyancy capacity, greatly improving the friction between the pile body and the soil and ensuring anti-buoyancy capacity.

[0005] This utility model is achieved through the following technical solution:

[0006] An anti-buoyancy control device for underground structures includes a pile rod for insertion into a pile hole, a corrugated support block installed on the body of the pile rod, a guide groove provided at the lower end of the pile rod, a movable rod slidably connected in the guide groove, and a pile head connected to the lower end of the movable rod.

[0007] The pile rod has a centering mechanism on the outer side near the lower end. When the movable rod moves upward relative to the pile rod, the centering mechanism expands outward and is centrally supported in the pile hole.

[0008] Furthermore, the centering mechanism includes a mounting head connected to the outer side of the pile near its lower end. The mounting head is a hollow shell structure, and a gap is left between the inner wall of the mounting head and the outer side of the pile.

[0009] The outer wall of the mounting head is slidably connected with several support frames that can move laterally along the circumference of the pile. Each support frame is connected to a vertically distributed limiting plate at one end of the mounting head. A horizontally distributed limiting rod is installed inside the mounting head, and the limiting rod is slidably connected to the limiting plate.

[0010] Furthermore, it also includes an elastic connector, wherein the bottom of the pile rod is provided with a sliding cavity communicating with the guide groove;

[0011] The elastic connector includes a spring and a sliding plate. The sliding plate is slidably connected in the sliding cavity and can move up and down. The bottom end of the spring is connected to the sliding plate and the top end is connected to the top of the sliding cavity.

[0012] The slide plate is connected to the limiting plate of the support frame through several transmission components.

[0013] Furthermore, the sidewall of the sliding cavity is provided with several vertically distributed strip grooves, the transmission component includes a connecting rod, the connecting rod passes through the strip groove, one end of the transmission component is hinged to the limiting plate through a first connecting seat, and the other end is hinged to the sliding plate through a second connecting seat.

[0014] Furthermore, it also includes a limiting mechanism, which includes a mounting plate with a limiting hole that allows the pile rod to pass through. The mounting plate is fixed to the ground on the top surface of the pile hole by a plug rod.

[0015] The mounting plate is symmetrically mounted with vertically distributed fixing plates on the left and right sides of the limiting hole. The surfaces of the two fixing plates are parallel to each other. A lead screw is threaded onto the surface of the fixing plate, and a baffle is rotatably connected to the inner end of the lead screw.

[0016] Furthermore, the waveform support block has several spherical protrusions along its length.

[0017] The beneficial effects achieved by this utility model compared with the prior art are as follows:

[0018] 1. When the pile is inserted into the pile hole, the centering mechanism will center the bottom pile. When the pile is centered in the pile hole, concrete is poured into the pile hole to form an anti-buoyancy pile. The anti-buoyancy pile is connected to the underground structure to achieve anti-buoyancy control. With the corrugated support block and the centering mechanism, it can provide sufficient anti-buoyancy tension when the groundwater level rises. This can make up for the problem that the anti-buoyancy capacity is limited due to the limited friction between the single anti-buoyancy pile and the surrounding soil. The effect is better.

[0019] 2. The centering mechanism includes an installation head and several support frames. When the support frames move outward, the bottom of the pile is centered. At the same time, the expansion of the support frames in all directions firmly enhances the anti-buoyancy capacity after the concrete is filled.

[0020] 3. The elastic connecting parts include springs and sliding plates. The sliding plates are connected to the limiting plates of the support frame one by one through several transmission components. When the movable rod moves upward relative to the slide groove, it pushes each transmission component to drive the support frame to move outward for centering. The structure is compact and easy to operate.

[0021] 4. The limiting mechanism mounting plate, fixing plate and screw rod can center and limit the top of the pile rod. In conjunction with the centering mechanism, the pile rod is centered in the pile hole, ensuring the quality of subsequent construction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the anti-buoyancy control device for underground buildings described in this utility model;

[0023] Figure 2 This is a schematic diagram of the bottom of the pile in the anti-buoyancy control device for underground buildings described in this utility model;

[0024] Figure 3 This is a schematic diagram of the corrugated support block in the underground building anti-buoyancy control device of this utility model;

[0025] Figure 4 This is a top view schematic diagram of the centering mechanism of this utility model in its working state;

[0026] In the diagram: 1. Pile rod; 2. Mounting head; 3. Sliding cavity; 4. Slide plate; 5. Movable rod; 6. Guide groove; 7. Pile head; 8. Strip groove; 9. Limiting rod; 10. Limiting plate; 11. Support frame; 12. First connecting seat; 13. Second connecting seat; 14. Connecting rod; 15. Spring; 16. Wave-shaped support block; 17. Mounting plate; 18. Insert rod; 19. Fixing plate; 20. Screw rod; 21. Baffle. Detailed Implementation

[0027] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0028] Please see Figures 1-4 This embodiment discloses an anti-buoyancy control device for underground buildings, which mainly includes a pile rod 1, an elastic connector, a centering mechanism, a limiting mechanism, and a wave-shaped support block 16.

[0029] The pile rod 1 is inserted into the drilled pile hole. A corrugated support block 16 is installed on the body of the pile rod 1. Several spherical protrusions are provided on the outer side of the corrugated support block 16 along the length direction, which can improve the anti-buoyancy ability when concrete is poured later. The lower end of the pile rod 1 is provided with a guide groove 6, and a movable rod 5 is slidably connected to the guide groove 6. The lower end of the movable rod 5 is connected to the pile head 7.

[0030] A sliding cavity 3 communicating with a guide groove 6 is machined at the bottom of the pile rod 1. n vertically distributed strip grooves 8 are formed around the sliding cavity 3, where n is a natural number greater than or equal to 2; in this embodiment, n is 6. An elastic connector is disposed within the sliding cavity 3 at the bottom of the pile rod 1 to connect the movable rod 5. The elastic connector includes a spring 15 and a sliding plate 4. The sliding plate 4 is slidably connected within the sliding cavity 3 and can move up and down. The bottom end of the spring 15 is connected to the sliding plate 4, and the top end is connected to the top of the sliding cavity 3. In this embodiment, the spring 15 provides elastic support for the pile head 7. When the pile head 7 at the bottom of the pile rod 1 is not in contact with the bottom of the pile hole, the sliding plate 4 is at the bottom of the sliding cavity 3. When the pile rod 1 is fully inserted into the pile hole, due to the restriction of the pile head 7, the sliding plate 4 slides upward relative to the sliding cavity 3, thereby opening the centering mechanism to center the bottom of the pile rod 1.

[0031] A centering mechanism is located at the bottom of the pile rod 1 and is used to center the pile rod 1 after it is inserted into the pile hole. The centering mechanism includes a mounting head 2 and n support frames 11. The mounting head 2 is fixedly connected to the outer side wall of the pile rod 1 near the lower end. The mounting head 2 is a hollow shell structure; in this embodiment, the outer contour of the mounting head 2 can be cylindrical. A gap is left between the inner side wall of the mounting head 2 and the outer side of the pile rod 1. The outer wall of the mounting head 2 is equipped with n support frames 11 along the circumference of the pile rod 1. Each support frame 11 is slidably connected to the side wall of the mounting head 2 and can move laterally along the radial direction of the mounting head 2. One end of the support frame 11 located inside the mounting head 2 is connected to a vertically distributed limiting plate 10, and a laterally distributed limiting rod 9 is installed inside the mounting head 2. The limiting rod 9 is slidably connected to the limiting plate 10, and the limiting plate 10 is connected to the sliding plate 4 through a transmission component.

[0032] In this embodiment, the transmission component includes a connecting rod 14, which passes through the strip groove 8. One end of the connecting rod 14 is hinged to the limiting plate 10 via a first connecting seat 12, and the other end is hinged to the sliding plate 4 via a second connecting seat 13. During the continuous lowering of the pile rod 1, when the pile head 7 at the bottom of the pile rod 1 contacts the bottom of the pile hole, the pile rod 1 will continue to descend. Due to the weight of the pile rod 1 itself, the sliding plate 4 will compress the spring 15 and slide upward relative to the sliding cavity 3. During this process, the connecting rod 14 will push the limiting plate 10 to slide along the limiting rod 9 away from the pile rod 1, so that the n support frames 11 extend outward simultaneously and contact the inner wall of the pile hole, thereby allowing the bottom of the pile rod 1 to be placed in the center. With the help of the limiting mechanism, the pile rod 1 can be placed in the center of the pile hole.

[0033] In this embodiment, a limiting mechanism is installed at the top of the drilled pile hole to limit the lowered pile rod 1. The limiting mechanism includes a mounting plate 17 with a limiting hole that allows the pile rod 1 to pass through. The mounting plate 17 is fixed to the ground at the top of the pile hole by a rod 18. Vertically distributed fixing plates 19 are symmetrically installed on the mounting plate 17 on the left and right sides of the limiting hole. The surfaces of the two fixing plates 19 are parallel, and a lead screw 20 is threaded onto the surface of the fixing plate 19. A baffle 21 is rotatably connected to the inner end of the lead screw 20.

[0034] During the process of lowering the pile rod 1, the mounting plate 17 is fixed to the top of the pile hole by inserting the rod 18. Then, the pile rod 1 is inserted into the pile hole after passing through the limiting hole of the mounting plate 17. During this process, by rotating the screw 20, the baffle 21 is used to center and limit the two sides of the pile rod 1, thereby restricting the lowering position of the pile rod 1.

[0035] The specific operation process for setting up anti-buoyancy piles in the underground building anti-buoyancy control device described in this embodiment is as follows:

[0036] First, a pile hole is drilled using a drilling rig. Then, a limiting mechanism is installed. Next, a lifting device is used to pass the pile rod 1 through the limiting mechanism into the pile hole, and the pile rod 1 is gradually lowered into the pile hole. The limiting mechanism restricts the lowering position of the pile rod 1. When the pile head 7 at the bottom of the pile rod 1 is lowered into place, the centering mechanism will center the bottom of the pile rod 1 under its own weight. With the help of the limiting mechanism, the pile rod 1 can be placed in the pile hole in a centered position. Then, concrete is poured into the pile hole to form an anti-buoyancy pile. The anti-buoyancy pile and the pile rod 1 are connected to the underground structure to achieve anti-buoyancy control. With the help of the corrugated support block 16, the installation head 2, and the support frame 11, sufficient anti-buoyancy tension can be provided when the groundwater level rises. This can make up for the problem that the anti-buoyancy capacity is limited due to the limited friction between the single anti-buoyancy pile and the surrounding soil. The effect is better.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anti-buoyancy control device for underground structures, comprising a pile rod for insertion into a pile hole, characterized in that, A corrugated support block is installed on the body of the pile rod, and a guide groove is provided at the lower end of the pile rod. A movable rod is slidably connected in the guide groove, and a pile head is connected to the lower end of the movable rod. The pile rod has a centering mechanism on the outer side near the lower end. When the movable rod moves upward relative to the pile rod, the centering mechanism expands outward and is centrally supported in the pile hole.

2. The anti-buoyancy control device for underground structures according to claim 1, characterized in that, The centering mechanism includes a mounting head connected to the outer side of the pile near its lower end. The mounting head is a hollow shell structure, and a gap is left between the inner wall of the mounting head and the outer side of the pile. The outer wall of the mounting head is slidably connected with several support frames that can move laterally along the circumference of the pile. Each support frame is connected to a vertically distributed limiting plate at one end of the mounting head. A horizontally distributed limiting rod is installed inside the mounting head, and the limiting rod is slidably connected to the limiting plate.

3. The anti-buoyancy control device for underground structures according to claim 2, characterized in that, It also includes an elastic connector, and the bottom of the pile rod is provided with a sliding cavity communicating with the guide groove; The elastic connector includes a spring and a sliding plate. The sliding plate is slidably connected in the sliding cavity and can move up and down. The bottom end of the spring is connected to the sliding plate and the top end is connected to the top of the sliding cavity. The slide plate is connected to the limiting plate of the support frame through several transmission components.

4. The anti-buoyancy control device for underground structures according to claim 3, characterized in that, The sidewall of the sliding cavity is provided with several vertically distributed strip grooves. The transmission component includes a connecting rod that passes through the strip groove. One end of the transmission component is hinged to the limiting plate through a first connecting seat, and the other end is hinged to the sliding plate through a second connecting seat.

5. The anti-buoyancy control device for underground structures according to claim 1, characterized in that, It also includes a limiting mechanism, which includes a mounting plate with a limiting hole that allows the pile rod to pass through. The mounting plate is fixed to the ground on the top surface of the pile hole by a plug rod. The mounting plate is symmetrically mounted with vertically distributed fixing plates on the left and right sides of the limiting hole. The surfaces of the two fixing plates are parallel to each other. A lead screw is threaded onto the surface of the fixing plate, and a baffle is rotatably connected to the inner end of the lead screw.

6. The anti-buoyancy control device for underground structures according to any one of claims 1-5, characterized in that, The waveform support block has several spherical protrusions along its length.

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