A pipe pile with good sealing effect and core filling method

Abstract

The present invention provides a pipe pile and a core filling method with good sealing effect, comprising: a pipe pile, a core filling area is provided at the top of the inner cavity of the pipe pile, a sand filling and grouting area is provided at the bottom of the inner cavity of the pipe pile, a pile top plugging plate is bolted to the top of the pipe pile, a pile bottom plugging plate is bolted to the bottom of the pipe pile, and threaded grooves are provided around the pile top plugging plate, the pile bottom plugging plate and the inner cavity of the pipe pile. The present invention can seal the pipe pile with the pile top plugging plate and the pile bottom plugging plate through the cooperation of the sealing gasket, the water-expandable pad and the fastening bolt, the pipe pile, the sealing gasket, the pile top plugging plate and the pile bottom plugging plate can be integrally fixed and sealed, and the outer side of the joint position of the sealing gasket, the pile top plugging plate and the pile bottom plugging plate can be auxiliary strengthened and sealed through the cooperation of the stainless steel clamp, thereby directly enhancing the overall sealing of the pipe pile joint position.

Description

Technical Field

[0001] The invention relates to the field of pipe pile core filling construction, and in particular to a pipe pile and a core filling method with good sealing effect. Background Art

[0002] Pipe piles are divided into post-tensioned prestressed pipe piles and pre-tensioned prestressed pipe piles, prestressed concrete pipe piles (PC pipe piles), prestressed concrete thin-walled pipe piles (PTC pipe piles) and high-strength prestressed concrete pipe piles (PHC pipe piles).

[0003] When construction units carry out construction projects, they need to dig foundation pits for pre-buried pipe piles. As the depth of the pipe piles continues to increase, multiple sections of pipe piles need to be connected and pre-buried for core filling. However, during the pre-buried core filling process of existing pipe piles, the sealing effect of the pipe pile joints is poor, and during the pre-buried pipe piles, they are squeezed by underground stress, which can easily cause gaps at the joints. Groundwater can easily penetrate into the core filling area inside the pipe piles through the gaps, resulting in poor quality of the core filling in the piles, resulting in the overall strength of the concrete and sand in the core filling area destroying the integrity of the pipe pile body, thereby directly affecting the service life of the entire foundation pit.

[0004] Therefore, it is necessary to provide a pipe pile and a core filling method with good sealing effect to solve the above technical problems. Summary of the invention

[0005] The invention provides a pipe pile with good sealing effect and a core filling method, which solves the problem that the sealing effect of the pipe pile joint position is poor during the core filling pre-embedded process of the existing pipe pile.

[0006] In order to solve the above technical problems, the present invention provides a pipe pile with good sealing effect, including: a pipe pile, a core filling area is arranged at the top of the inner cavity of the pipe pile, a sand filling and grouting area is arranged at the bottom of the inner cavity of the pipe pile, the top of the pipe pile is bolted with a pile top end plugging plate, the bottom of the pipe pile is bolted with a pile bottom end plugging plate, threaded grooves are provided around the pile top end plugging plate, the pile bottom end plugging plate and the inner cavity of the pipe pile are all provided with sealing structures at the ends of the pile top end plugging plate and the pile bottom end plugging plate facing the pipe pile.

[0007] Preferably, the sealing structure includes a sealing gasket, a limiting groove, a fastening plate, a water-swellable pad, a fastening bolt and a stainless steel clamp. The ends of the pile top end plugging plate and the pile bottom end plugging plate facing the pipe pile are both padded with sealing gaskets, and the side of the pile top end plugging plate and the pile bottom end plugging plate away from the pipe pile are both provided with limiting grooves, the inner cavity of the limiting groove is clamped with a fastening plate, and the side of the fastening plate facing the limiting groove is bonded with a water-swellable pad, and the four sides of the fastening plate away from the limiting groove are threadedly connected with fastening bolts used in conjunction with the threaded groove, and the sealing gasket is sleeved with a stainless steel clamp on the side facing the pile top end plugging plate and the pile bottom end plugging plate.

[0008] Preferably, a sealing washer and an anti-loosening washer are respectively sleeved on the surface of the screw rod of the fastening bolt from the inside to the outside, and the sealing washer and the anti-loosening washer have the same thickness.

[0009] Preferably, a reinforcement layer is integrally formed on the outer side of the pipe pile, and the material of the reinforcement layer is concrete slurry. The thickness of the sealing gasket, the pile top end plugging plate and the pile bottom end plugging plate are all the same.

[0010] Preferably, the fastening bolts are distributed in a circular structure along the center of the fastening plate, and the number of the fastening bolts is at least eight.

[0011] A method for filling a pipe pile core with good sealing effect comprises the following steps:

[0012] A. Before placing the pile, weld steel plates at both ends of the flanges to seal them. The size and shape of the steel plates should be consistent with the pile diameter.

[0013] B. After the first section of the pile is plugged, use a static pile driver to push the pile downwards to a suitable position with one end of the pile plugged, and complete the pile connection construction;

[0014] C. When the multi-section pipe piles are connected and the total length meets the design requirements, the pile body is delivered to the designed elevation;

[0015] D. After the pipe piles are placed in place and grouting is completed, the first stage of curing begins, and the first stage of curing is mainly for the curing of the pile side wall slurry and reinforcement layer;

[0016] E. After the foundation pit is excavated to the designed elevation, the steel plate on the top of the pile can be removed and the core filling construction can be carried out. During the core filling construction, the part below the steel cage can be compacted by grouting or sand filling. When grouting through the grouting pipe, the grouting should be done while the pipe is lifted. However, it is necessary to ensure that the pipe mouth is buried in the cement slurry for at least 2m, and the grouting pipe must not be raised above the slurry surface.

[0017] Compared with the related art, the pipe pile and core filling method with good sealing effect provided by the present invention have the following beneficial effects:

[0018] The present invention provides a pipe pile and a core filling method with good sealing effect.

[0019] 1. The present invention can seal the pipe pile with the top plugging plate and the bottom plugging plate of the pile through the cooperation of the sealing gasket. The pipe pile, the sealing gasket, the top plugging plate of the pile and the bottom plugging plate of the pile can be fixed and sealed as a whole through the cooperation of the limit groove, the fastening plate, the water-expandable gasket and the fastening bolt. The outer side of the joint position of the sealing gasket, the top plugging plate of the pile and the bottom plugging plate of the pile can be auxiliary strengthened and sealed through the cooperation of the stainless steel clamp, so as to directly enhance the overall sealing of the pipe pile joint position, avoid the influence of groundwater entering the interior of the pipe pile body on the strength of the core filling material, improve the overall quality of the core filling inside the pipe pile, and extend the service life of the entire foundation pit. Through the cooperation of the core filling step process, the core filling operation is made more standardized and reasonable, the concrete mortar fillers are filled densely, the bubble gap is avoided, and the overall stability of the pipe pile is improved.

[0020] 2. The present invention can perform auxiliary sealing treatment between the fastening bolt and the fastening plate through the sealing gasket and the anti-loosening gasket, which can enhance the sealing effect of the fastening bolt, prevent the fastening bolt from loosening when it is stationary, and improve the stability of the fastening bolt. The reinforcing layer can enhance the overall material strength of the pipe pile, avoid the pipe pile from being deformed and damaged by force and extrusion, and extend the overall service life of the pipe pile. The thickness of the sealing gasket, the pile top plugging plate and the pile bottom plugging plate are all the same, so the bearing capacity of the sealing gasket is improved, and the sealing gasket is avoided from being drastically deformed and damaged by force. The fastening bolts are distributed in a circular structure along the center of the fastening plate and the number is at least eight, so the four sides of the fastening plate can be evenly tightened and fixed, thereby improving the overall firmness of the fastening plate to the pipe pile, the pile top plugging plate and the pile bottom plugging plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A structural schematic diagram of a preferred embodiment of a pipe pile and a core filling method with good sealing effect provided by the present invention;

[0022] Figure 2 for Figure 1 A partial front view of the structure of the sealing structure shown;

[0023] Figure 3 for Figure 1 The core filling flow chart of the pipe pile is shown.

[0024] Numbers in the figure: 1. Pipe pile; 2. Core filling area; 3. Sand filling and grouting area; 4. Pile top plugging plate; 5. Pile bottom plugging plate; 6. Sealing structure; 61. Sealing pad; 62. Limiting groove; 63. Fastening plate; 64. Water-swellable pad; 65. Fastening bolt; 66. Stainless steel clamp; 7. Sealing washer; 8. Anti-loosening washer; 9. Reinforcement layer. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0026] Please refer to Figure 1 , Figure 2 and Figure 3 ,in Figure 1 A structural schematic diagram of a preferred embodiment of a pipe pile and a core filling method with good sealing effect provided by the present invention; Figure 2 for Figure 1 A partial front view of the structure of the sealing structure shown; Figure 3 for Figure 1 The pipe pile with good sealing effect comprises: a pipe pile 1, a core filling area 2 is arranged at the top of the inner cavity of the pipe pile 1, a sand filling and grouting area 3 is arranged at the bottom of the inner cavity of the pipe pile 1, a pile top plugging plate 4 is bolted to the top of the pipe pile 1, and a pile bottom plugging plate 5 is bolted to the bottom of the pipe pile 1, and thread grooves are arranged around the pile top plugging plate 4, the pile bottom plugging plate 5 and the inner cavity of the pipe pile 1, and a sealing structure 6 is arranged at the end of the pile top plugging plate 4 and the pile bottom plugging plate 5 facing the pipe pile 1.

[0027] The sealing structure 6 includes a sealing gasket 61, a limiting groove 62, a fastening plate 63, a water-swelling pad 64, a fastening bolt 65 and a stainless steel clamp 66. The ends of the pile top plugging plate 4 and the pile bottom plugging plate 5 facing the pipe pile 1 are padded with a sealing gasket 61, which can seal the pipe pile 1 and the pile top plugging plate 4 and the pile bottom plugging plate 5. The pile top plugging plate 4 and the pile bottom plugging plate 5 are both provided with a limiting groove 62 on the side away from the pipe pile 1. The inner cavity of the limiting groove 62 is clamped with a fastening plate 63. The water-swelling pad 64 is bonded to the side of the fastening plate 63 and the limiting groove 62. The surroundings of the fastening plate 63 away from the limiting groove 62 They are all threadedly connected with fastening bolts 65 used in conjunction with the thread groove, which can perform overall fixed sealing between the pipe pile 1, the sealing gasket 61, the pile top end plugging plate 4 and the pile bottom end plugging plate 5. The sealing gasket 61 is sleeved with a stainless steel clamp 66 on the side facing the pile top end plugging plate 4 and the pile bottom end plugging plate 5, which can perform auxiliary strengthening sealing treatment on the outside of the joint position of the sealing gasket 61, the pile top end plugging plate 4 and the pile bottom end plugging plate 5, thereby directly enhancing the overall sealing of the joint position of the pipe pile 1, preventing groundwater from entering the pile body of the pipe pile 1 and affecting the strength of the core filling material, improving the overall quality of the core filling inside the pipe pile 1, and extending the service life of the entire foundation pit.

[0028] The screw surface of the fastening bolt 65 is respectively sleeved with a sealing gasket 7 and an anti-loosening gasket 8 from the inside to the outside. The sealing gasket 7 and the anti-loosening gasket 8 have the same thickness and can perform auxiliary sealing treatment between the fastening bolt 65 and the fastening plate 63. While enhancing the sealing effect of the fastening bolt 65, it also prevents the fastening bolt 65 from loosening when it is stationary, and also improves the stability of the fastening bolt 65.

[0029] The outer side of the pipe pile 1 is integrally formed with a reinforcing layer 9 made of concrete slurry. The sealing gasket 61 and the overall material strength of the reinforced pipe pile 1 can prevent the pipe pile 1 from being deformed and damaged due to force extrusion, thereby extending the overall service life of the pipe pile 1. The thickness of the pile top plugging plate 4 and the pile bottom plugging plate 5 are the same, which improves the bearing capacity of the sealing gasket 61 and prevents the sealing gasket 61 from being drastically deformed and damaged due to force.

[0030] The fastening bolts 65 are distributed in a circular structure along the center of the fastening plate 63. The number of the fastening bolts 65 is at least eight, which can evenly tighten and fix the fastening plate 63 around, thereby improving the overall firmness of the fastening plate 63 to the pipe pile 1, the pile top end plugging plate 4 and the pile bottom end plugging plate 5.

[0031] A method for filling a pipe pile core with good sealing effect comprises the following steps:

[0032] A. Before placing the pipe pile 1, weld steel plates at the flanges at both ends to seal them. The size and shape of the steel plates should be consistent with the pile diameter;

[0033] B. After the first section of the pile 1 is plugged, use a static pile driver to push the pile 1 downward with one end facing downward to a suitable position, and complete the pile connection construction;

[0034] C. When the multi-section pipe pile 1 is connected and the total length meets the design requirements, the pile body is delivered to the designed elevation position;

[0035] D. After the pipe pile 1 is placed in place and the grouting is completed, the first stage of curing begins, and the first stage of curing is mainly for the curing of the pile side wall slurry and the reinforcement layer 9;

[0036] E. After the foundation pit is excavated to the designed elevation, the steel plate on the top of the pile can be removed and the core filling construction can be carried out. During the core filling construction, the part below the steel cage can be compacted by grouting or sand filling. When grouting through the grouting pipe, the grouting should be done while the pipe is lifted. However, it is necessary to ensure that the pipe mouth is buried in the cement slurry for at least 2m, and the grouting pipe must not be raised above the slurry surface.

[0037] The working principle of the pipe pile and core filling method with good sealing effect provided by the present invention is as follows:

[0038] When the user seals the joint position of the pipe pile 1, the user places the sealing gasket 61 at the core position of the pipe pile 1 in advance, and then clamps the sealing gasket 61 with the pile top end plugging plate 4 and the pile bottom end plugging plate 5 respectively, and then the user fixes the water-swellable pad 64 around the fastening disk 63 and clamps it into the limiting groove 62, and then the user manually puts the sealing gasket 7 and the anti-loosening gasket 8 on the fastening bolt 65 in turn, and then uses the tool to firmly fix the fastening bolt 65 between the fastening disk 63, the sealing gasket 61, the pile top end plugging plate 4, the pile bottom end plugging plate 5 and the pipe pile 1, and finally the user tightens the stainless steel clamp 66 on the outside of the connection position between the sealing gasket 61 and the pile top end plugging plate 4 and the pile bottom end plugging plate 5 to complete the sealing operation of the joint position of the pipe pile 1, and then the user performs the core filling operation.

[0039] Compared with the related art, the pipe pile and core filling method with good sealing effect provided by the present invention have the following beneficial effects:

[0040] The present invention can seal the pipe pile 1 with the top plugging plate 4 and the bottom plugging plate 5 of the pile by the cooperation of the sealing gasket 61. The pipe pile 1, the sealing gasket 61, the top plugging plate 4 and the bottom plugging plate 5 of the pile can be fixed and sealed as a whole by the cooperation of the limit groove 62, the fastening plate 63, the water-swellable pad 64 and the fastening bolt 65. The outer side of the joint position of the sealing gasket 61, the top plugging plate 4 and the bottom plugging plate 5 of the pile can be auxiliaryly strengthened and sealed by the cooperation of the stainless steel clamp 66, so as to directly enhance the overall sealing of the joint position of the pipe pile 1, avoid groundwater entering the pile body of the pipe pile 1 and affecting the strength of the core filling material, improve the overall quality of the core filling inside the pipe pile 1, and extend the service life of the entire foundation pit. By coordinating the core filling steps and processes, the core filling operation is made more standardized and reasonable, the concrete mortar fillers are filled densely, the bubble gaps are avoided, and the overall stability of the pipe pile 1 is improved.

[0041] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pipe pile with good sealing effect, characterized in that: include: A pipe pile (1), wherein a core filling area (2) is provided at the top of the inner cavity of the pipe pile (1), a sand filling grouting area (3) is provided at the bottom of the inner cavity of the pipe pile (1), a pile top end plugging plate (4) is bolted to the top of the pipe pile (1), and a pile bottom end plugging plate (5) is bolted to the bottom of the pipe pile (1), threaded grooves are provided around the pile top end plugging plate (4), the pile bottom end plugging plate (5) and the inner cavity of the pipe pile (1), and a sealing structure (6) is provided at the ends of the pile top end plugging plate (4) and the pile bottom end plugging plate (5) facing the pipe pile (1); The sealing structure (6) comprises a sealing pad (61), a limiting groove (62), a fastening plate (63), a water-swellable pad (64), a fastening bolt (65) and a stainless steel clamp (66); the ends of the pile top end plugging plate (4) and the pile bottom end plugging plate (5) facing the pipe pile (1) are both padded with a sealing pad (61); the sides of the pile top end plugging plate (4) and the pile bottom end plugging plate (5) away from the pipe pile (1) are both provided with a limiting groove (62); The inner cavity of the limiting groove (62) is clamped with a fastening plate (63), and a water-swellable pad (64) is bonded to the side of the fastening plate (63) and the limiting groove (62) facing each other. The fastening plate (63) is threadedly connected with fastening bolts (65) used in conjunction with the threaded groove on all sides away from the limiting groove (62), and a stainless steel clamp (66) is sleeved on the side of the sealing gasket (61) facing the pile top end plugging plate (4) and the pile bottom end plugging plate (5); The screw rod surface of the fastening bolt (65) is respectively sleeved with a sealing washer (7) and an anti-loosening washer (8) from the inside to the outside, and the sealing washer (7) and the anti-loosening washer (8) have the same thickness; A reinforcement layer (9) is integrally formed on the outer side of the pipe pile (1), and the material of the reinforcement layer (9) is concrete slurry. The sealing pad (61), the pile top end plugging plate (4) and the pile bottom end plugging plate (5) are all of the same thickness.

2. The pipe pile with good sealing effect according to claim 1, characterized in that: The fastening bolts (65) are distributed in a circular structure along the center of the fastening plate (63), and the number of the fastening bolts (65) is at least eight.

3. A method for filling the core of a pipe pile with good sealing effect, characterized in that: The method for applying the pipe pile as claimed in claim 1 comprises the following steps: A. Pipe piles (1) Before placement, weld steel plates to seal the flanges at both ends. The size and shape of the steel plates should be consistent with the pile diameter. B. After the first section of the pipe pile (1) is plugged, a static pile driver is used to push the pile (1) downward with one end of the plugging facing downward to a suitable position, and the pile connection construction is completed; C. When the multi-section pipe pile (1) is connected and the total length meets the design requirements, the pile body is delivered to the designed elevation; D. After the pipe pile (1) is placed in place and the grouting is completed, the first stage of curing begins, and the first stage of curing is mainly for curing the slurry on the side wall of the pile body and the reinforcing layer (9); E. After the foundation pit is excavated to the designed elevation, the steel plate on the top of the pile can be removed to carry out the core filling construction. During the core filling construction, the part below the steel cage is compacted by grouting or sand filling. When grouting through the grouting pipe, the grouting is carried out while the pipe is lifted. However, it is necessary to ensure that the pipe mouth is buried in the cement slurry for at least 2m, and the grouting pipe must not be raised above the slurry surface.

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