Anti-floating fixing clamp for reinforcement cage of cast-in-place pile

Abstract

The utility model relates to the technical field of building engineering construction, especially a kind of fixing fixture for preventing the floating of bored pile reinforcement cage, including support foot pad and connecting plate, support foot pad is fixedly connected in the both sides of connecting plate, the one side fixedly connected with fixed clamping plate in the bottom of connecting plate. Thread adjusting mechanism of adjusting screw rod and moving clamping plate is set on connecting plate, and radial clamping of reinforcement cage is realized by cooperating fixed clamping plate, the structure can continuously adjust clamping spacing, is applicable to the reinforcement cage of different diameter specifications, significantly improves the versatility and on-site applicability of device, avoids the drawbacks that traditional fixing mode needs custom processing or on-site welding.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a fixing clamp for preventing the steel cage of a cast-in-place pile from floating. Background Technology

[0002] As a widely used deep foundation type in construction engineering, cast-in-place piles typically involve key processes such as borehole drilling, reinforcement cage hoisting, and concrete pouring. When pouring concrete underwater or under mud-wall conditions, as the concrete gradually rises from the bottom of the pile hole, the newly poured concrete generates an upward buoyancy force on the bottom of the reinforcement cage. This phenomenon is further exacerbated by the concrete's entrainment of the reinforcement cage during the tremie pipe lifting process. This causes the reinforcement cage to float or shift to varying degrees within the incompletely cured concrete. Floating of the reinforcement cage not only alters its designed embedment depth within the pile, affecting the pile's structural performance, but can also lead to quality problems such as insufficient anchorage length of the top reinforcement and inaccurate reinforcement distribution within the pile. In severe cases, this can jeopardize the safety and durability of the entire structure. Therefore, effectively preventing the reinforcement cage from floating during the pouring process is a crucial control point for ensuring the quality of cast-in-place pile construction.

[0003] Currently, common anti-floating measures on construction sites mainly include welding lifting bars to the top of the rebar cage and fixing them to the crossbeam at the borehole, using ground anchors with steel wire ropes, or using simple U-shaped clamps with bolts for tightening and fixing. Although the above methods can achieve temporary fixation of the rebar cage to a certain extent, they have many limitations in practical applications: existing devices are mostly welded or fixed-size structures, which cannot be flexibly adjusted according to changes in the diameter of the rebar cage, making it difficult to meet the universal construction needs of different specifications of piles. Secondly, existing devices are difficult to disassemble and assemble, and cannot be quickly positioned and adjusted. Each installation requires repeated debugging, which seriously affects the construction rhythm.

[0004] Therefore, there is an urgent need to provide a fixing clamp for preventing the cast-in-place pile reinforcing cage from floating, which can be quickly adjusted and installed according to the diameter of the reinforcing cage. Utility Model Content

[0005] In order to overcome the shortcomings of existing anti-floating devices for reinforcing cages, such as poor adjustability, cumbersome installation and disassembly, and low construction efficiency, this utility model adopts the following technical solution: providing a fixing clamp for preventing the floating of cast-in-place pile reinforcing cages that can be quickly adjusted and installed according to the diameter of the reinforcing cage.

[0006] The technical solution of this utility model is: a fixing clamp for preventing the floating of a cast-in-place pile reinforcement cage, comprising a supporting foot pad and a connecting plate. The supporting foot pads are fixed to both sides of the connecting plate, and a fixing clamp is fixed to one side of the bottom of the connecting plate. A first sliding groove is opened in the middle of the connecting plate, and an adjusting screw is rotatably arranged in the first sliding groove. One end of the adjusting screw is rotatably connected to the connecting plate, and the other end extends out of the connecting plate and is fixed to a handwheel. A movable clamp is arranged on the threaded section of the adjusting screw, and the movable clamp is located in the first sliding groove and is arranged opposite to the fixing clamp.

[0007] Furthermore, a silicone plate is provided on the clamping surface of the movable clamping plate that contacts the reinforcing cage.

[0008] Furthermore, the grip portion of the handwheel is covered with an anti-slip rubber sleeve.

[0009] Furthermore, the support foot pad is provided with a conical insert, which has a tapered structure with a sharp lower end. Symmetrically distributed rotating shafts are rotatably arranged on both sides of the inner wall of the conical insert, and side inserts are mounted on the rotating shafts. An adjusting screw is threadedly arranged in the upper part of the conical insert. An internal thread groove is provided on the inner circumference of the conical insert, and an external thread groove is provided on the outer circumference of the matching adjusting screw. In addition, a countersunk hole is formed at the top of the adjusting screw, and a guide groove is formed in the lower part of the conical insert. A pressure rod is slidably arranged in the guide groove. The top of the pressure rod is rotatably connected to the bottom of the adjusting screw, and the bottom of the pressure rod forms an inclined surface fit with the upper surface of the side insert. Two flexible connecting ropes are respectively connected to the bottom of the pressure rod, and the other ends of the two flexible connecting ropes are respectively connected to the corresponding side inserts.

[0010] Furthermore, a support plate is fixedly connected to the connecting plate, and the support plate has two second sliding grooves. A bidirectional lead screw is rotatably provided in the two sliding grooves, with the threads at both ends of the lead screw turning in opposite directions to form symmetrical left-hand and right-hand thread segments. The two ends of the bidirectional lead screw extend out of the outside of the support plate and are fixedly connected to handles. Limiting plates are slidably provided on both second sliding grooves and are threadedly connected to the corresponding thread segments of the bidirectional lead screw.

[0011] Furthermore, a rubber plate is provided on the side of the limiting plate facing the reinforcing cage.

[0012] Compared with the prior art, the present invention has the following technical effects: 1. By setting an adjusting screw and a movable clamping plate to form a threaded adjustment mechanism on the connecting plate, and cooperating with the fixed clamping plate to achieve radial clamping of the steel cage, the structure can continuously adjust the clamping distance and is suitable for steel cages of different diameters, which significantly improves the versatility and on-site applicability of the device and avoids the disadvantages of traditional fixing methods that require custom processing or on-site welding.

[0013] 2. This device integrates a radial clamping mechanism and a limiting mechanism to form a multi-dimensional collaborative constraint system. It not only effectively resists the vertical buoyancy generated during concrete pouring, but also suppresses the back-and-forth swing and displacement of the steel cage, ensuring its precise positioning in the design position.

[0014] 3. The deployable ground anchor structure, consisting of a conical insert, rotating shaft, side insert rod, adjusting screw, pressure rod, and flexible connecting rope, can automatically insert and anchor into the ground and retract by rotating the adjusting screw, which greatly shortens the installation and dismantling time and improves the construction pace. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional sectional view of the supporting foot pads, connecting plates, and fixing clamps of this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the adjusting screw, handwheel, and silicone plate components of this utility model.

[0018] Figure 4 This is a three-dimensional sectional view of the conical insert, side insert rod, and adjusting screw of this utility model.

[0019] Figure 5 This is a three-dimensional sectional view of the components of this utility model, such as the rotating shaft, pressure rod, and flexible connecting rope.

[0020] Figure 6 This is a three-dimensional sectional view of the support plate, bidirectional lead screw, and handle of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1: Support foot pad, 2: Connecting plate, 201: Fixed clamping plate, 3: Adjusting screw, 4: Handwheel, 5: Moving clamping plate, 6: Silicone plate, 7: Anti-slip rubber sleeve, 8: Conical insert, 9: Rotating shaft, 10: Side inserting rod, 11: Adjusting screw, 12: Pressure rod, 13: Flexible connecting rope, 14: Support plate, 15: Two-way screw, 16: Handle, 17: Limiting plate, 18: Rubber plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1: Please refer to Figures 1-3 A fixing clamp for preventing the rebar cage of a cast-in-place pile from floating includes a supporting foot pad 1 and a connecting plate 2. Supporting foot pads 1 are fixed to both the front and rear sides of the connecting plate 2 to stably support the clamp on the borehole casing or pile platform. A vertically arranged fixing clamp 201 is fixed to the left side of the bottom of the connecting plate 2 to hold the inner side of the transverse stirrups around the outer periphery of the rebar cage, forming a fixed support point on one side. A first sliding groove is formed along the length of the connecting plate 2 in the middle. An adjusting screw 3 is rotatably installed in the first sliding groove. One end of the adjusting screw 3 is rotatably connected to the connecting plate 2, and the other end extends out of the connecting plate 2 and is fixed to a handwheel 4 for easy manual operation. The grip part of the handwheel 4 is covered with an anti-slip rubber sleeve 7 to increase the gripping force during operation. The adjustable screw 3 has a vertically arranged movable clamping plate 5 on its threaded section. The movable clamping plate 5 is located in the first slide groove and is opposite to the fixed clamping plate 201. It is used to clamp the outer side of the transverse stirrups on the outer periphery of the reinforcing cage, forming a fixed support point on the other side. When the handwheel 4 is rotated, the adjustable screw 3 drives the movable clamping plate 5 to move horizontally along the first slide groove, realizing continuous adjustment of the clamping distance. The clamping surface of the movable clamping plate 5 in contact with the reinforcing cage is provided with a silicone plate 6. The silicone plate 6 has good elasticity and friction coefficient, which can protect the surface of the reinforcing bar during clamping, prevent scratches, and effectively improve clamping friction and enhance anti-slip performance.

[0024] In use, firstly, multiple fixing clamps are evenly arranged around the circumference of the reinforcing cage at the opening position. Then, the fixing clamp 201 is inserted into the inner side of the uppermost transverse stirrup of the reinforcing cage as a fixing fulcrum. Subsequently, the operator turns the handwheel 4 to drive the adjusting screw 3 to rotate, so that the moving clamp 5 is pushed along the first sliding groove towards the center of the reinforcing cage under the action of threaded transmission until the silicone plate 6 on it is tightly attached to the outer circumference of the reinforcing cage. By adjusting the clamping force of multiple clamps, the circumferential uniform constraint of the reinforcing cage is achieved, forming a reliable radial limiting structure.

[0025] Example 2: Based on Example 1, please refer to... Figure 4 and Figure 5The supporting foot pad 1 is equipped with a conical insert 8. The conical insert 8 has a pointed lower end, which facilitates insertion into soft soil or pile platforms, improving the connection stability between the clamp and the ground. The inner side walls of the conical insert 8 are symmetrically arranged with rotating shafts 9. Side insert rods 10 are mounted on the rotating shafts 9. The side insert rods 10 can rotate around the rotating shafts 9. When in the retracted state, they fit against the outer side of the insert wall; when in the extended state, they open outwards and insert into the surrounding soil, forming a lateral anchoring force. An adjusting screw 11 is threaded into the upper part of the conical insert 8. The inner circumference of the conical insert 8 has an internal threaded groove, and the matching adjusting screw 11 has an external threaded groove on its outer circumference. The threaded engagement allows the adjusting screw 11 to move axially up and down. Furthermore… The top of the adjusting screw 11 has a countersunk hexagonal socket for use with an Allen wrench or a special tool to achieve precise rotational force. The lower part of the conical insert 8 has a guide groove along the height direction. A pressure rod 12 is slidably installed in the guide groove. The top of the pressure rod 12 is rotatably connected to the bottom of the adjusting screw 11, and the bottom of the pressure rod 12 forms an inclined surface with the upper surface of the side insert 10. When the adjusting screw 11 rotates downward, it drives the pressure rod 12 to move downward synchronously along the guide groove. The bottom of the pressure rod 12 is connected to one end of two flexible connecting ropes 13, and the other end of the two flexible connecting ropes 13 is connected to the corresponding side insert 10. When the pressure rod 12 moves upward, it applies an outward pulling force to the two side inserts 10 through the flexible connecting ropes 13.

[0026] When it is necessary to fix the fixing clamp, first press the conical insert 8 vertically into the ground to a certain depth. Then, use an Allen wrench to insert into the Allen countersunk hole at the top of the adjusting screw 11 and rotate it clockwise. The adjusting screw 11 moves downward under the action of the threaded transmission, driving the pressure rod 12 down along the guide groove. During the downward movement, the pressure rod 12 pushes the side inserts 10 outward, causing the two side inserts 10 to rotate outward around the pivot 9 until they are fully inserted into the surrounding soil, forming a stable lateral support, which significantly improves the pull-out resistance and anti-slip capability of the support pad 1. After the construction is completed, rotate the adjusting screw 11 counterclockwise, and the pressure rod 12 rises away from the area of ​​action of the side inserts 10. Then, use the connecting rope to pull the side inserts 10 inward. At this time, the entire conical insert 8 can be easily pulled out of the ground for easy reuse.

[0027] Please see Figure 6A support plate 14 is fixedly connected to the connecting plate 2. The support plate 14 has two second sliding grooves along its length. A bidirectional screw 15 is rotatably mounted on the two sliding grooves. The two ends of the screw 15 have opposite threads, forming symmetrical left-hand and right-hand threaded sections. The front and rear ends of the bidirectional screw 15 extend out of the support plate 14 and are fixedly connected to handles 16. Limiting plates 17 are slidably mounted on both second sliding grooves and are threadedly connected to the corresponding threaded sections of the bidirectional screw 15. When the bidirectional screw 15 is rotated, the two limiting plates 17 move synchronously towards or away from each other along the second sliding grooves under the action of threaded transmission, realizing clamping or loosening actions. A rubber plate 18 is provided on the side of the limiting plate 17 facing the reinforcing cage. The rubber plate 18 has a certain elasticity and friction coefficient to increase the static friction between the limiting plate 17 and the main reinforcement or stirrups of the reinforcing cage, thereby improving the reliability of the limiting action.

[0028] Initially, the two limiting plates 17 are positioned outside the second chute, leaving sufficient space for the reinforcing cage to pass through. After the reinforcing cage has been radially clamped by the fixed clamp 201 and the movable clamp 5, the operator holds the handle 16 and rotates the double-acting screw 15 clockwise or counterclockwise. Since the threads at both ends rotate in opposite directions, the two limiting plates 17 move synchronously towards the center under the action of the threaded transmission until the rubber plate 18 is tightly fitted with the side wall of the exposed main reinforcement or reinforcing stirrup of the reinforcing cage, forming a bidirectional constraint in the front and rear directions. Thus, during the concrete pouring process, if the reinforcing cage tends to sway back and forth due to the upward flow of concrete or the lifting of the guide pipe, the limiting mechanism can effectively limit its lateral displacement, prevent eccentric force or positioning deviation, and ensure the precise positioning of the reinforcing cage in three-dimensional space. After construction is completed, the handle 16 is rotated in the opposite direction, causing the two limiting plates 17 to exit outward synchronously, detaching from the reinforcing cage, facilitating overall disassembly and reuse.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fixing clamp for preventing the reinforcing cage of a cast-in-place pile from floating, comprising a supporting foot pad (1) and a connecting plate (2), wherein the supporting foot pad (1) is fixedly connected to both sides of the connecting plate (2), characterized in that, A fixed clamping plate (201) is fixedly connected to one side of the bottom of the connecting plate (2). A first sliding groove is provided in the middle of the connecting plate (2). An adjusting screw (3) is rotatably arranged in the first sliding groove. One end of the adjusting screw (3) is rotatably connected to the connecting plate (2), and the other end extends out of the connecting plate (2) and is fixedly connected to a handwheel (4). A movable clamping plate (5) is provided on the threaded section of the adjusting screw (3). The movable clamping plate (5) is located in the first sliding groove and is arranged opposite to the fixed clamping plate (201).

2. The fixing clamp for preventing the reinforcing cage of a cast-in-place pile from floating as described in claim 1, characterized in that, The clamping surface of the movable clamping plate (5) that contacts the reinforcing cage is provided with a silicone plate (6).

3. A fixing clamp for preventing the reinforcing cage of a cast-in-place pile from floating as described in claim 2, characterized in that, The gripping part of the handwheel (4) is covered with an anti-slip rubber sleeve (7).

4. A fixing clamp for preventing the reinforcing cage of a cast-in-place pile from floating as described in claim 3, characterized in that, The support foot pad (1) is provided with a conical insert (8). The conical insert (8) has a conical structure with a sharp lower end. The inner two side walls of the conical insert (8) are symmetrically distributed with rotating shafts (9). Side inserts (10) are installed on the rotating shafts (9). An adjusting screw (11) is threaded in the upper part of the conical insert (8). The inner circumference of the conical insert (8) is provided with an internal thread groove. The adjusting screw (11) is provided with an external thread groove on its outer circumference. In addition, the adjusting screw (11) The top of the cone-shaped insert (8) has an internal hexagonal countersunk hole, and the lower part of the cone-shaped insert (8) has a guide groove. A pressure rod (12) is slidably arranged in the guide groove. The top of the pressure rod (12) is rotatably connected to the bottom of the adjusting screw (11), and the bottom of the pressure rod (12) forms an inclined surface fit with the upper surface of the side insert (10). The bottom of the pressure rod (12) is connected to one end of two flexible connecting ropes (13), and the other end of the two flexible connecting ropes (13) is connected to the corresponding side insert (10).

5. A fixing clamp for preventing the reinforcing cage of a cast-in-place pile from floating as described in claim 4, characterized in that, A support plate (14) is fixedly connected to the connecting plate (2). The support plate (14) has two second sliding grooves. A bidirectional lead screw (15) is rotatably provided in the second sliding grooves. The threads at both ends of the lead screw (15) are opposite in direction, forming symmetrical left-hand and right-hand thread segments. Both ends of the bidirectional lead screw (15) extend out of the outside of the support plate (14) and are fixedly connected to a handle (16). Limiting plates (17) are slidably provided on both second sliding grooves and are threadedly connected to the corresponding thread segments of the bidirectional lead screw (15).

6. A fixing clamp for preventing the reinforcing cage of a cast-in-place pile from floating as described in claim 5, characterized in that, The limiting plate (17) is provided with a rubber plate (18) on the side facing the steel cage.

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