Precast pipe pile top plugging device and method

Abstract

The invention discloses a prefabricated pipe pile top plugging device and method. The device comprises a vertical rod, a rotating handle is arranged at the top end of the vertical rod, a bottom sealing mechanism is arranged at the bottom end of the vertical rod, and a grip penetrates through the upper portion of the vertical rod and is rotatably supported on the grip; the bottom sealing mechanism comprises a round seat of which the center is fixed on the vertical rod, hollow rods which are uniformly distributed and fixed along the outer circle of the round seat, movable rods which are matched in the hollow rods in an axial sliding manner, friction blocks which are fixed at the ends, far away from the axis, of the movable rods, connecting rods which are hinged to the ends, close to the axis, of the movable rods, a blanking cap and bottom sealing cloth; the connecting rods are matched with the arc-shaped grooves through movable hinge points, the bottom sealing cloth is used for bottom sealing during pouring, the inner edge of the bottom sealing cloth is connected to the outer circle of the round base, the outer edge of the bottom sealing cloth is connected to the inner side of the friction block, and a plurality of cloth sleeves are arranged in the middle of the bottom sealing cloth and arranged on telescopic rods formed by the hollow rods and the movable rods in all positions in a sleeving mode. The steel plate does not need to be welded on the reinforcement cage for bottom sealing by adopting a whole-surface steel plate.

Description

Technical Field

[0001] The invention relates to prefabricated pipe pile construction, and in particular to a prefabricated pipe pile top plugging device and method. Background Art

[0002] Prefabricated pipe piles are used as pile foundations because of their low cost, hollow interior, high strength, low concrete usage, and ease of construction. They have been widely used in the construction industry. After the prefabricated pipe piles are installed and before the underground foundation is constructed, the top of the prefabricated pipe piles needs to be poured and sealed. Currently, steel plates are welded at the bottom of the steel cage and used as the bottom seal for pouring and sealing. This method will waste the entire steel plate (especially prefabricated pipe piles with larger inner diameters). Secondly, it has high requirements for the size of the steel plate, which needs to be processed to the right size. It must not only be able to smoothly enter the prefabricated pipe pile and pass to the preset position, but also meet the requirements that the gap between the steel plate and the inner wall of the prefabricated pipe pile will not be too large. Thirdly, there are many welding points between the steel plate and the steel cage, and there are installation risks in on-site welding. Summary of the invention

[0003] The purpose of the present invention is to provide a prefabricated pipe pile top sealing device and a prefabricated pipe pile top sealing method based on the above device, which can achieve a sealing effect while avoiding the use of a whole steel plate for bottom sealing, can flexibly adapt to prefabricated pipe piles of various sizes, has low size requirements, and does not need to be welded to a steel cage.

[0004] The technical solution adopted by the present invention is: A prefabricated pipe pile top plugging device comprises a vertical rod, the top of the vertical rod is provided with a rotating handle, the bottom end is provided with a bottom sealing mechanism, the upper part passes through a grip and is rotatably supported on the grip; the bottom sealing mechanism comprises a round seat fixed at the center on the vertical rod, hollow rods evenly fixed along the outer circle of the round seat, a movable rod axially slidably fitted in each hollow rod, a friction block fixed at the end of each movable rod away from the axis, a connecting rod hinged at the end of each movable rod close to the axis, a plugging cover, and a bottom sealing cloth; arc grooves are evenly distributed around the axis on the round seat, and clamping grooves are evenly distributed along the side of the arc groove close to the axis. The connecting rod cooperates with the arc groove through a movable hinge point. When the round seat is rotated, the movable rod extends out and passes through the hollow rod under the action of centrifugal force. The movable hinge is driven by the connecting rod to move along the arc groove. When the movable rod is blocked from extending, the movable hinge enters the nearest slot to limit the movable rod. The friction block is used to press against the inner wall of the prefabricated pipe pile together with other friction blocks to provide support for the entire device. It is arc-shaped. When the movable rod is extended to the shortest, all friction blocks are combined to form a whole ring. The plug cover is arranged on the round seat to cover the arc groove to prevent leakage. The bottom sealing cloth is used for sealing the bottom during pouring. Its inner edge is connected to the outer circle of the round seat, the outer edge is connected to the inner side of the friction block, and a number of cloth sleeves are arranged in the middle to cover the telescopic rod formed by the hollow rods and the movable rod. When the movable rod is extended to the longest, the bottom sealing cloth is fully unfolded and forms a whole circle together with the round seat and the friction blocks.

[0005] Preferably, the round seat includes a cylinder and a circular plate arranged inside the cylinder, an arc groove is opened on the circular plate, a blocking cover is covered on the cylinder, the vertical rod passes through the blocking cover and connects to the circular plate, the hollow rod is fixed on the cylinder, the movable rod passes through the hollow rod and enters the cylinder and is located below the circular plate, and the connecting rod is located below the circular plate inside the cylinder.

[0006] Preferably, a flange is provided on the upper portion of the vertical rod, and the flange is rotatably supported on the handle.

[0007] Preferably, the outer side of the friction block is provided with textures for increasing friction.

[0008] Preferably, a tongue and groove is provided at the end of the friction block, and when the movable rod is extended to the shortest, the tongue and groove between adjacent friction blocks cooperate with each other.

[0009] Preferably, the back cover cloth is a waterproof tarpaulin.

[0010] A method for sealing the top of a prefabricated pipe pile adopts the above-mentioned prefabricated pipe pile top sealing device: first, clean the surrounding area and inner wall of the top of the prefabricated pipe pile, then hold the handle to put the bottom sealing mechanism into the prefabricated pipe pile, when the bottom sealing mechanism reaches a suitable depth, hold the handle with one hand and rotate the rotating handle with the other hand, the rotating handle drives the round seat to rotate through the vertical rod, during the rotation of the round seat, the movable rod extends out under the action of centrifugal force and drives the movable hinge to move along the arc groove through the connecting rod, when the friction block hits the inner wall of the prefabricated pipe pile, the movable hinge enters the nearest card slot to limit the movable rod, and the friction blocks jointly press against the inner wall of the prefabricated pipe pile to provide support for the entire device, after which there is no need to hold the handle, the bottom sealing cloth, the round seat and the friction blocks jointly achieve the bottom sealing, and then the steel cage is inserted into the prefabricated pipe pile and fixed to ensure that the lower end of the steel cage does not interfere with the bottom sealing mechanism, and then the top of the prefabricated pipe pile is poured and sealed, leaving the entire device in the prefabricated pipe pile.

[0011] The beneficial effects of the present invention are: The device uses a bottom sealing cloth as the main bottom sealing material. Since the inner edge of the bottom sealing cloth is connected to the outer circle of the round seat, the outer edge is connected to the inner side of the friction block, and a number of cloth sleeves are arranged in the middle to cover the telescopic rods formed by the hollow rods and the movable rods at various locations, it will not be affected by the telescopic movement of the movable rods. Even if the movable rods are not extended to the longest state and there are wrinkled parts, there will be no gaps between the inner wall of the prefabricated pipe piles that are sufficient for leakage of slurry. While achieving a sealing effect, it avoids the use of a whole steel plate for bottom sealing. The device can adjust the extended length of the movable rod and lock it, and can flexibly adapt to prefabricated pipe piles of various sizes, with low size requirements. The device uses friction blocks to provide support, does not need to be welded to the steel cage, and does not require on-site welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a prefabricated pipe pile top plugging device.

[0013] Figure 2 It is a top view of the bottom sealing mechanism when the movable rod is extended to the longest and the tarpaulin is fully unfolded, with the blocking cover hidden.

[0014] Figure 3 yes Figure 2 Schematic diagram after removing the tarpaulin.

[0015] Figure 4 It is a top view of the bottom sealing mechanism when the movable rod is extended to the shortest and all the friction blocks are closed to form a complete ring.

[0016] Figure 5 It is a schematic diagram of the friction block, hollow rod, movable rod, connecting rod and movable hinge when the movable rod is extended to the longest.

[0017] Figure 6 It is a schematic diagram of the friction block, hollow rod, movable rod, connecting rod and movable hinge when the movable rod is extended to the shortest.

[0018] Figure 7 It is a schematic diagram of the arc groove, the card slot and the movable hinge.

[0019] Figure 8 It is a working schematic diagram of the prefabricated pipe pile top plugging device.

[0020] In the figure: 1-vertical rod; 11-rotating handle; 12-flange; 2-handle; 3-round seat; 31-cylinder; 32-round plate; 33-arc groove; 34-cage slot 4-Blocking cover; 5-back cover cloth; 51-cloth cover; 6-friction block; 61-tongue and groove; 7-Active hinge point; 8-Hollow rod; 9- movable rod; 10-connecting rod; A-Prefabricated pipe piles; B-Reinforcement cage. DETAILED DESCRIPTION

[0021] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0022] The present application discloses a prefabricated pipe pile top plugging device, comprising a vertical rod 1, a handle 2 and a bottom sealing mechanism; Figures 1 to 7As shown: a rotating handle 11 is provided at the top of the vertical rod 1; the handle 2 is inserted into the upper part of the vertical rod 1, and the vertical rod 1 is rotatably supported on the handle 2; a bottom sealing mechanism is arranged at the bottom end of the vertical rod 1, and the bottom sealing mechanism includes a round seat 3, a hollow rod 8, a movable rod 9, a friction block 6, a connecting rod 10, a blocking cover 4 and a bottom sealing cloth 5. The center of the round seat 3 is fixed on the vertical rod 1, and the hollow rods 8 are evenly fixed along the outer circle of the round seat 3. The movable rods 9 can be axially slidably fitted in each hollow rod 8, and the friction block 6 is fixed at the end of each movable rod 9 away from the axis. The connecting rod 10 is hinged at the end of each movable rod 9 close to the axis. The round seat 3 is evenly distributed with arc grooves 33 around the axis, and the arc grooves 33 are evenly distributed along the side close to the axis. The connecting rod 10 cooperates with the arc groove 33 through the movable hinge 7. When the round seat 3 is rotated, the movable rod 9 is under the action of centrifugal force. It extends downward and drives the movable hinge 7 to move along the arc groove 33 through the connecting rod 10. When the movable rod 9 is blocked from extending, the movable hinge 7 enters the nearest slot 34 to limit the movable rod 9. The friction block 6 is used to press against the inner wall of the prefabricated pipe pile A together with other friction blocks 6 to provide support for the entire device. The friction block 6 is arc-shaped. When the movable rod 9 is extended to the shortest, all friction blocks 6 are combined into a whole ring. The plugging cover 4 is arranged on the round seat 3 to cover the arc groove 33 to prevent leakage. The bottom sealing cloth 5 is used for sealing the bottom during pouring. The inner edge of the bottom sealing cloth 5 is connected to the outer circle of the round seat 3, the outer edge is connected to the inner side of the friction block 6, and a plurality of cloth sleeves 51 are arranged in the middle to be sleeved on the telescopic rod formed by the hollow rods 8 and the movable rod 9 at various locations. When the movable rod 9 is extended to the longest, the bottom sealing cloth 5 is fully unfolded and forms a whole circle together with the round seat 3 and the friction blocks 6.

[0023] like Figure 1 As shown, in this embodiment, preferably: a flange 12 is provided on the upper portion of the vertical rod 1 , and the flange 12 is rotatably supported on the handle 2 .

[0024] like Figures 2 to 6 As shown, in this embodiment, preferably: a tongue and groove 61 is provided at the end of the friction block 6, and when the movable rod 9 is extended to the shortest, the tongue and groove 61 between adjacent friction blocks 6 cooperate with each other.

[0025] like Figures 2 to 3 As shown, in this embodiment, preferably: the round seat 3 includes a cylinder 31 and a circular plate 32 arranged in the cylinder 31, an arc groove 33 is opened on the circular plate 32, a blocking cover 4 covers the cylinder 31, the vertical rod 1 passes through the blocking cover 4 and is connected to the circular plate 32, the hollow rod 8 is fixed on the cylinder 31, the movable rod 9 passes through the hollow rod 8 and enters the cylinder 31 and is located below the circular plate 32, and the connecting rod 10 is located below the circular plate 32 in the cylinder 31.

[0026] In this embodiment, preferably: the outer side of the friction block 6 is provided with a pattern for increasing friction; and the bottom cover cloth 5 is made of waterproof tarpaulin.

[0027] The working steps of the above-mentioned prefabricated pipe pile top plugging device are as follows: S1) Clean the surrounding area and inner wall of the prefabricated pipe pile A; S2) Hold the handle 2 to put the bottom sealing mechanism into the prefabricated pipe pile A. When the bottom sealing mechanism reaches the appropriate depth, hold the handle 2 with one hand and rotate the rotating handle 11 with the other hand. The rotating handle 11 drives the round seat 3 to rotate through the vertical rod 1. During the rotation of the round seat 3, the movable rod 9 extends under the action of centrifugal force and drives the movable hinge 7 to move along the arc groove 33 through the connecting rod 10. When the friction block 6 hits the inner wall of the prefabricated pipe pile A, the movable hinge 7 enters the nearest card groove 34 to limit the movable rod 9. The friction blocks 6 are pressed against the inner wall of the prefabricated pipe pile A to provide support for the entire device. After that, there is no need to hold the handle 2. The bottom sealing cloth 5, the round seat 3 and the friction blocks 6 can achieve the bottom sealing together. S4) Figure 8 As shown, the steel cage B is inserted into the prefabricated pipe pile A and fixed, ensuring that the lower end of the steel cage B does not interfere with the bottom sealing mechanism; S5) Perform injection and plugging operations on the top of prefabricated pipe pile A, leaving the entire device inside prefabricated pipe pile A.

[0028] The device uses a bottom sealing cloth 5 as the main bottom sealing material. Since the inner edge of the bottom sealing cloth 5 is connected to the outer circle of the round seat 3, the outer edge is connected to the inner side of the friction block 6, and a number of cloth sleeves 51 are arranged in the middle to be sleeved on the telescopic rod formed by the hollow rods 8 and the movable rods 9 at various locations, it will not be affected by the telescopic movement of the movable rods 9. Even if the movable rods 9 are not in the longest extended state and there are wrinkled parts, there will be no gap between the inner wall of the prefabricated pipe pile A that is sufficient for leakage of slurry. While achieving a sealing effect, it avoids the use of a whole steel plate for bottom sealing. The device can adjust the extended length of the movable rod 9 and lock it, and can flexibly adapt to prefabricated pipe piles A of various sizes, with low size requirements. The device uses the friction block 6 to provide support, does not need to be welded to the steel cage B, and does not need on-site welding.

[0029] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A prefabricated pipe pile top plugging device, characterized in that: It includes a vertical rod, the top of the vertical rod is provided with a rotating handle, the bottom end is provided with a bottom sealing mechanism, and the upper part is passed through a handle and is rotatably supported on the handle; the bottom sealing mechanism includes a round seat whose center is fixed on the vertical rod, hollow rods evenly fixed along the outer circle of the round seat, movable rods axially slidably fitted in each hollow rod, a friction block fixed at the end of each movable rod away from the axis, a connecting rod hinged at the end of each movable rod close to the axis, a blocking cover, and a bottom sealing cloth; arc grooves are evenly distributed around the axis on the round seat, and clamping grooves are evenly distributed along the side of the arc groove close to the axis. The connecting rod cooperates with the arc groove through a movable hinge point. When the round seat is rotated, the movable rod extends out under the action of centrifugal force and drives the movable rod through the connecting rod The movable hinge moves along the arc groove. When the movable rod is blocked from extending, the movable hinge enters the nearest slot to limit the movable rod. The friction block is used to press against the inner wall of the prefabricated pipe pile together with other friction blocks to provide support for the entire device. It is arc-shaped. When the movable rod is extended to the shortest, all friction blocks are combined to form a complete ring. The plug cover is arranged on the round seat to cover the arc groove to prevent leakage. The bottom sealing cloth is used for sealing the bottom during pouring. Its inner edge is connected to the outer circle of the round seat, the outer edge is connected to the inner side of the friction block, and several cloth sleeves are arranged in the middle to cover the telescopic rod formed by the hollow rods and the movable rod. When the movable rod is extended to the longest, the bottom sealing cloth is fully unfolded and forms a complete circle together with the round seat and the friction blocks.

2. The prefabricated pipe pile top plugging device according to claim 1, characterized in that: The round seat includes a cylinder and a circular plate arranged in the cylinder, an arc groove is opened on the circular plate, a blocking cover is covered on the cylinder, a vertical rod passes through the blocking cover and is connected to the circular plate, a hollow rod is fixed on the cylinder, a movable rod passes through the hollow rod and enters the cylinder and is located below the circular plate, and a connecting rod is located below the circular plate in the cylinder.

3. The prefabricated pipe pile top plugging device according to claim 1, characterized in that: A flange is arranged on the upper part of the vertical rod, and the flange is rotatably supported on the handle.

4. The prefabricated pipe pile top plugging device according to claim 1, characterized in that: The outer side of the friction block is provided with textures for increasing friction.

5. The prefabricated pipe pile top plugging device according to claim 1, characterized in that: The end of the friction block is provided with a tongue and groove, and when the movable rod is extended to the shortest, the tongue and groove between adjacent friction blocks cooperate with each other.

6. The prefabricated pipe pile top plugging device according to claim 1, characterized in that: The back cover is made of waterproof tarpaulin.

7. A method for plugging the top of a prefabricated pipe pile, characterized in that: The prefabricated pipe pile top sealing device as described in claims 1 to 6 is used: first, the surrounding area and inner wall of the prefabricated pipe pile top are cleaned, and then the bottom sealing mechanism is placed into the prefabricated pipe pile by holding the handle. When the bottom sealing mechanism reaches the appropriate depth, the handle is held in one hand and the rotating handle is rotated with the other hand. The rotating handle drives the round seat to rotate through the vertical rod. During the rotation of the round seat, the movable rod extends out under the action of centrifugal force and drives the movable hinge to move along the arc groove through the connecting rod. When the friction block hits the inner wall of the prefabricated pipe pile, the movable hinge enters the nearest slot to limit the movable rod. The friction blocks jointly rest on the inner wall of the prefabricated pipe pile to provide support for the entire device. After that, there is no need to hold the handle. The bottom sealing cloth, the round seat and the friction blocks jointly achieve the bottom sealing. Then the steel cage is inserted into the prefabricated pipe pile and fixed to ensure that the lower end of the steel cage does not interfere with the bottom sealing mechanism. Then the top of the prefabricated pipe pile is poured and sealed to leave the entire device in the prefabricated pipe pile.

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