A method for controlling the quality of underwater cast-in-place concrete piles

Abstract

The present invention relates to a technology for underwater casting of concrete piles for bored piles, specifically a method for controlling the quality of the pile body of underwater casting of concrete piles for bored piles. The method solves the problem that the quality of the pile body is difficult to guarantee during the concrete casting process of wet-operation bored piles, and is prone to quality problems such as slag inclusion, faults, and collapsed holes. By adjusting the operating handle 1 and the operating handle 2 until the sampling port 1 and the sampling port 2 are completely overlapped, the concrete at the sampling point enters the interior of the pipe 2, and adjusting the operating handle 1 and the operating handle 2 again to completely stagger the sampling port 1 and the sampling port 2, lifting the tool in the vertical direction, and finally taking out the sample from the interior of the pipe 2 by lifting the rod, the quality of the concrete is analyzed to determine whether it meets the requirements; if a quality problem occurs, the guide tube is reinserted to a position lower than the position with the quality problem, and then the concrete is poured to push the concrete with the quality problem out of the pile hole.

Description

Technical Field

[0001] The invention relates to a technology for underwater casting of cast-in-place concrete piles, in particular to a method for controlling the quality of cast-in-place concrete pile bodies. Background Art

[0002] During construction, wet-drilled cast-in-place piles are often bored with mud walls. After the hole is drilled and the reinforcing cage is lowered, the conduit for pouring concrete is installed and placed near the bottom of the hole. As the concrete level rises during subsequent pouring, the conduit also rises. However, the conduit must be inserted into the concrete to a certain depth to ensure that the mud remains above the concrete surface.

[0003] During the lifting process, the guide tube inevitably rises too high, causing the concrete and mud to mix together, significantly reducing the quality of the finished concrete. Furthermore, pile holes with mud walls can collapse during construction, with the surrounding soil mixing into the concrete. Quality control of cast-in-place concrete piles is often performed post-process, and when quality issues are discovered during testing, remedial measures or rework are implemented. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to solve the problem that the pile body quality is difficult to ensure during the pouring of concrete in wet-operation bored piles, and quality problems such as slag inclusion, faults, and hole collapse are easily generated.

[0005] In order to solve the above technical problems, the inventors have come up with the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0006] A method for controlling the quality of underwater cast-in-place concrete pile bodies, wherein the quality control steps are as follows:

[0007] 1) Tool making:

[0008] Select pipes with appropriate diameters and open sampling ports on their sides;

[0009] Select a pipe fitting 2 of appropriate diameter and open a sampling port 2 on its side. The outer diameter of the pipe fitting 2 should match the inner diameter of the pipe fitting 1.

[0010] A sampling cup is connected to the movable socket inside the second pipe, multiple sealing rings are installed between the outer wall of the sampling cup and the inner wall of the second pipe, and a rod is welded to the inner middle part of the sampling cup;

[0011] Pipe fitting 1, pipe fitting 2 and rod are all connected by up-down splicing;

[0012] Internal threads are provided on the tops of the pipe fitting 1, pipe fitting 2 and rod except for the top.

[0013] The bottoms of the pipe fitting 1, pipe fitting 2 and rod, except those at the bottom, are all provided with external threads matching the internal threads;

[0014] An operating handle 1 is welded and fixed on the top of the first pipe fitting at the top, and an operating handle 2 is provided on the top of the second pipe fitting at the top, and the operating handle 1 and the operating handle 2 are arranged to rotate with each other;

[0015] A lifting handle is welded to the top of the top rod;

[0016] 2) Cast-in-place pile construction:

[0017] Most wet bored piles are bored with mud walls. After the hole is bored and the steel cage is lowered, the conduit for pouring concrete is installed. The conduit is placed close to the bottom of the hole. During the subsequent concrete pouring process, as the concrete elevation rises, the conduit also rises. However, the conduit must always be inserted into the concrete to a certain depth to ensure that the mud is always above the concrete surface.

[0018] 3) Pile body quality control:

[0019] Adjust the sampling cup to the root of the bottom pipe fitting 2, install pipe fitting 1, pipe fitting 2, and rod fittings one by one, and assemble pipe fitting 1, pipe fitting 2, and rod fittings in the length direction through external and internal threads according to the sampling depth requirements of the cast-in-place pile. While assembling, probe down to the sampling location in the vertical direction;

[0020] Adjust the operating handle 1 and the operating handle 2 until the sampling port 1 and the sampling port 2 are completely overlapped, and the concrete at the sampling point enters the interior of the pipe fitting 2. Adjust the operating handle 1 and the operating handle 2 again to completely offset the sampling port 1 and the sampling port 2. Lift the tool vertically, and finally take out the sample from the interior of the pipe fitting 2 by lifting the rod. Analyze the quality of the concrete to determine whether it meets the requirements.

[0021] If quality problems occur, reinsert the guide tube to a position lower than the position with quality problems, and then pour concrete to push the concrete with quality problems out of the pile hole.

[0022] Preferably, a cleaning block is installed on the outer side of the top of the sampling cup, and the cleaning block is vertically slidably fitted into the interior of the second sampling port.

[0023] Preferably, a counterweight is provided at the bottom of the first pipe.

[0024] Preferably: in the step 3), the catheter is reinserted to a position lower than the position with quality problems using a probing tool, the probing tool includes a limit clamp, a hoop for the catheter to enter is provided on one side of the limit clamp, an adjusting rod passes through the limit clamp from top to bottom, a rubber skin is installed at the bottom end of the limit clamp, the bottom of the adjusting rod is exposed at the bottom of the limit clamp and is connected to a mounting block, a support rod group is connected to the mounting block, and the support rod group is suitable for supporting the rubber skin group to seal the bottom of the catheter.

[0025] Preferably: the support rod group includes a long rod rotatably installed at the bottom of the adjusting rod and a short rod rotatably installed on the side of the mounting block. A reset spring is installed on the outside of the adjusting rod located on the lower side of the mounting block. The free ends of the short rod and the long rod are arranged in a rotating structure. The reset spring is suitable for moving the adjusting rod downward to drive the long rod to rotate the short rod downward to open the discharge end of the conduit. When the reset spring is compressed under the action of the adjusting rod, it drives the long rod to rotate the short rod upward to block the discharge end of the conduit.

[0026] Preferably: the top of the adjusting rod is exposed at the top of the limiting clamp and is connected with a compression nut through a thread, a pad is installed on the compression nut and the top of the limiting clamp, and the compression nut is suitable for vertically lifting the adjusting rod and compressing the reset spring.

[0027] Preferably, a handle is installed on the top of the limit clamp, and a through hole is provided on the top of the handle only for vertical movement of the adjustment rod.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This method is different from the existing technology in that the existing technology is post-remediation or rework, which is costly, complicated and difficult, while this method is in-process quality control, and pile quality problems can be solved in a timely manner, which is conducive to reducing costs and improving project quality.

[0030] Use sampling tools to take samples during the pouring process, and analyze whether there are any quality problems with the concrete based on the sampling. If there are quality problems, use the tool to reinsert the catheter into the concrete below the slag area to pour out the slag-included concrete and ensure the quality of the cast-in-place pile concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a top view of the overall structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the sampling structure of the present invention;

[0033] Figure 3 It is a top view of the drilling tool;

[0034] Figure 4 It is a schematic diagram of the local structure of the bottom of the drilling tool;

[0035] Figure 5 Schematic diagram of the structure of the support rod group of the drilling tool.

[0036] In the figure: 1. Pipe fitting 1; 11. Sampling port 1; 12. Pipe fitting 2; 13. Sampling port 2; 14. Sampling cup; 15. Rod; 16. Operating handle 1; 17. Operating handle 2; 18. Lifting handle; 19. Counterweight; 110. Cleaning block; 2. Limiting fixture; 21. Hoop body; 22. Adjusting rod; 23. Rubber skin; 24. Mounting block; 25. Return spring; 26. Short rod; 27. Long rod; 28. Press-fit nut; 29. ​​Pad; 210. Handle. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0039] Example 1, as Figure 1 and Figure 2 As shown, a method for controlling the quality of underwater cast-in-place concrete pile bodies is characterized in that the quality control steps are as follows:

[0040] 1) Tool making:

[0041] Select a pipe fitting 1 of suitable diameter and open a sampling port 11 on its side;

[0042] Select a pipe fitting 12 of appropriate diameter and open a sampling port 13 on its side. The outer diameter of the pipe fitting 12 should match the inner diameter of the pipe fitting 1.

[0043] A sampling cup 14 is connected to the movable socket inside the second pipe 12. Multiple sealing rings are installed between the outer wall of the sampling cup 14 and the inner wall of the second pipe 12. A rod 15 is welded to the inner middle part of the sampling cup 14.

[0044] The pipe fitting 1, the pipe fitting 2 12 and the rod 15 are all connected by upper and lower splicing;

[0045] Internal threads are provided on the tops of the pipe 1, pipe 2 12 and rod 15 except for the top.

[0046] The bottoms of the pipe fitting 1, pipe fitting 2 12, and rod 15, except those at the bottom, are all provided with external threads that match the internal threads;

[0047] An operating handle 16 is welded and fixed on the top of the pipe 1 located at the top, and an operating handle 2 17 is provided on the top of the pipe 12 located at the top. The operating handle 16 and the operating handle 2 17 are arranged to rotate with each other.

[0048] A lifting handle 18 is welded to the top of the rod 15;

[0049] 2) Cast-in-place pile construction:

[0050] Most wet bored piles are bored with mud walls. After the hole is bored and the steel cage is lowered, the conduit for pouring concrete is installed. The conduit is placed close to the bottom of the hole. During the subsequent concrete pouring process, as the concrete elevation rises, the conduit also rises. However, the conduit must always be inserted into the concrete to a certain depth to ensure that the mud is always above the concrete surface.

[0051] 3) Pile body quality control:

[0052] Adjust the sampling cup 14 to the root of the bottom pipe 2 12, install pipe 1, pipe 2 12, and rod 15 one by one, and assemble pipe 1, pipe 2 12, and rod 15 in the length direction through external and internal threads according to the sampling depth requirements of the cast-in-place pile. While assembling, probe down to the sampling point in the vertical direction;

[0053] Adjust the operating handle 16 and the operating handle 2 17 until the sampling port 11 and the sampling port 2 13 are completely overlapped, and the concrete at the sampling point enters the interior of the pipe 2 12. Adjust the operating handle 16 and the operating handle 2 17 again to completely offset the sampling port 11 and the sampling port 2 13. Lift the tool vertically, and finally take out the sample from the interior of the pipe 2 12 by lifting the rod 15. Analyze the quality of the concrete to determine whether it meets the requirements.

[0054] If quality problems occur, reinsert the guide tube to a position lower than the position with quality problems, and then pour concrete to push the concrete with quality problems out of the pile hole.

[0055] A cleaning block 110 is installed on the outer side of the top of the sampling cup 14 and the cleaning block 110 is vertically slidably fitted into the interior of the sampling port 2 13 . A counterweight block 19 is provided at the bottom of the pipe 1 .

[0056] Based on the above embodiment, the following improvements are made: Figure 3 and Figure 4As shown, in step 3, the catheter is reinserted to a position lower than the position with quality problems using a probing tool. The probing tool includes a limit card 2, a hoop body 21 for the catheter to enter is provided on one side of the limit card 2, an adjusting rod 22 is passed through the limit card 2 from top to bottom, and a rubber skin 23 is installed at the bottom end of the limit card 2. The rubber skin 23 will wrap the outer side of the adjusting rod 22 located at the bottom of the limit card 2. The bottom of the adjusting rod 22 is exposed at the bottom of the limit card 2 and is connected to a mounting block 24. The mounting block 24 is located on the inner side of the rubber skin 23. A support rod group is connected to the mounting block 24. The support rod group is suitable for supporting the rubber skin 23 to block the bottom of the catheter. By blocking and opening the bottom opening of the catheter with the rubber skin 23, the rubber skin 23 on it can complete the blocking of the bottom of the catheter during the probing process, and can be actively opened after probing to a suitable depth, completing the re-grouting process.

[0057] The support rod group includes a long rod 27 rotatably mounted on the bottom of the adjusting rod 22 and a short rod 26 rotatably mounted on the side of the mounting block 24. The free ends of the long rod 27 and the short rod 26 are arranged in a rotating structure. A return spring 25 is sheathed on the outside of the adjusting rod 22 located at the bottom of the mounting block 24. The return spring 25 is suitable for moving the adjusting rod 22 downward to drive the long rod 27 to rotate the short rod 26 downward to open the discharge end of the catheter. When the return spring 25 is compressed under the action of the adjusting rod 22, it drives the long rod 27 to rotate the short rod 26 upward to block the discharge end of the catheter. When unfolded, the projection on the horizontal plane can completely cover the discharge port of the catheter.

[0058] The top of the adjustment rod 22 is exposed at the top of the limit clamp 2 and is threadedly connected to a compression nut 28. A backing plate 29 is installed on the compression nut 28 and the top of the limit clamp 2. The compression nut 28 is suitable for vertically lifting the adjustment rod 22 and compressing the return spring 25. By adjusting the compression nut 28, the adjustment rod 22 is lifted, causing the support rod group located on the rubber skin 23 to be extended, while compressing the return spring 25. When the compression nut 28 is adjusted in the opposite direction, the compressed return spring 25 can automatically reset the adjustment rod 22, thereby driving the support rod group to retract, retracting the rubber skin 23, and completing the opening of the conduit outlet.

[0059] A handle 210 is installed on the top of the limit clamp 2 , and a through hole is provided on the top of the handle 210 only for the vertical movement of the adjustment rod 22 .

[0060] By clamping the hoop body 21 of the limit clamp 2 on the outside of the conduit and moving it downward to the top of the large end at the bottom of the conduit, adjusting the crimping nut 28 to lift the mounting block 24 and compressing the reset spring 25, the long rod 27 moves up and rotates outward and rotates the bottom of the short rod 26 outward to expand the rubber skin 23 and complete the sealing of the discharge end of the conduit, and the conduit is driven down to the concrete at the bottom of the position with quality problems through the limit clamp 2, and the crimping nut 28 is adjusted in the reverse direction. The mounting block 24 will move downward under the action of the reset spring 25, and the free ends of the long rod 27 and the short rod 26 move toward the side close to the reset spring 25, thereby retracting the rubber skin and opening the discharge end of the conduit. The upper and lower positions of the adjusting rod 22 can only be adjusted up and down relative to the handle 210 on the limit clamp 2, and the top of the adjusting rod 22 and the through hole are matched with a rectangular structure.

[0061] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacements described may be partial structures, devices, or method steps, or they may be complete technical solutions. The present invention provides for sampling and analysis during the conduit casting process. Any equivalent replacements or modifications based on the technical solution and inventive concept of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A method for controlling the quality of underwater cast-in-place concrete piles, characterized by: The quality control steps are as follows: 1) Tool making: Select a pipe fitting (1) of suitable diameter and open a sampling port (11) on its side; Select a pipe fitting 2 (12) of suitable diameter and open a sampling port 2 (13) on its side. The outer diameter of the pipe fitting 2 (12) is adapted to the inner diameter of the pipe fitting 1 (1); A sampling cup (14) is connected to the internal movable socket of the second pipe (12), multiple sealing rings are installed between the outer wall of the sampling cup (14) and the inner wall of the second pipe (12), and a rod (15) is welded to the inner middle part of the sampling cup (14); The pipe fitting 1 (1), the pipe fitting 2 (12) and the rod (15) are all connected by upper and lower splicing; Internal threads are provided on the tops of the pipe fitting 1 (1), pipe fitting 2 (12) and rod (15) except for the top. The bottoms of the pipe fitting 1 (1), the pipe fitting 2 (12) and the rod (15) except those located at the bottom are all provided with external threads matching the internal threads; An operating handle 1 (16) is welded and fixed on the top of the pipe 1 (1) located at the top, and an operating handle 2 (17) is provided on the top of the pipe 2 (12) located at the top; A lifting handle (18) is welded to the top of the rod (15); 2) Cast-in-place pile construction: The bored piles in wet drilling are bored with mud wall. After the hole is drilled and the steel cage is lowered, the conduit for pouring concrete is installed. The conduit is placed close to the bottom of the hole. During the subsequent concrete pouring process, as the concrete elevation rises, the conduit is also lifted. However, the conduit must always be inserted into the concrete to a certain depth to ensure that the mud is always above the concrete surface. 3) Pile body quality control: Adjust the sampling cup (14) to the root of the bottom pipe fitting 2 (12), install pipe fitting 1 (1), pipe fitting 2 (12), and rod (15) one by one, assemble pipe fitting 1 (1), pipe fitting 2 (12), and rod (15) in the length direction through external and internal threads according to the sampling depth requirements of the cast-in-place pile, and while assembling, probe down to the sampling location in the vertical direction; By adjusting the operating handle 1 (16) and the operating handle 2 (17) until the sampling port 1 (11) and the sampling port 2 (13) are completely overlapped, the concrete at the sampling location enters the interior of the pipe fitting 2 (12), and the operating handle 1 (16) and the operating handle 2 (17) are adjusted again to completely offset the sampling port 1 (11) and the sampling port 2 (13), and the tool is lifted in the vertical direction, and finally the sample inside the pipe fitting 2 (12) is taken out by lifting the rod (15), and the quality of the concrete is analyzed to determine whether the quality meets the requirements; If quality problems occur, reinsert the guide tube to a position lower than the location with quality problems, and then pour concrete to push the concrete with quality problems out of the pile hole; In step 3), the catheter is reinserted to a position lower than the position with quality problems using a probing tool, the probing tool comprising a limit clamp (2), a hoop body (21) for the catheter to enter is provided on one side of the limit clamp (2), an adjusting rod (22) is passed through the limit clamp (2) from top to bottom, a rubber skin (23) is installed at the bottom end of the limit clamp (2), the bottom of the adjusting rod (22) is exposed at the bottom of the limit clamp (2) and is connected to a mounting block (24), a support rod group is connected to the mounting block (24), and the support rod group is suitable for supporting the rubber skin (23) to block the bottom of the catheter; The support rod group includes a long rod (27) rotatably mounted on the bottom of the adjusting rod (22) and a short rod (26) rotatably mounted on the side of the mounting block (24). The free ends of the short rod (26) and the long rod (27) are arranged in a rotating structure. A return spring (25) is sleeved on the outer side of the adjusting rod (22) located on the lower side of the mounting block (24). The return spring (25) is suitable for driving the long rod (27) to rotate the short rod (26) downward to open the discharge end of the conduit when the adjusting rod (22) moves downward. When the return spring (25) is compressed under the action of the adjusting rod (22), it drives the long rod (27) to rotate the short rod (26) upward to block the discharge end of the conduit.

2. A method for controlling the quality of a bored pile underwater concrete casting according to claim 1, characterized in that: A cleaning block (110) is installed on the outside of the top of the sampling cup (14), and the cleaning block (110) is vertically slidably fitted inside the second sampling port (13).

3. A method for controlling the quality of a bored pile underwater cast concrete pile body according to claim 2, characterized in that: A counterweight (19) is provided at the bottom of the pipe member 1 (1).

4. A method for controlling the quality of a bored pile underwater cast concrete pile body according to claim 3, characterized in that: The top of the adjusting rod (22) is exposed at the top of the limiting clamp (2) and is connected to a compression nut (28) through a thread. A backing plate (29) is installed between the compression nut (28) and the top of the limiting clamp (2). The compression nut (28) is suitable for vertically lifting the adjusting rod (22) and compressing the return spring (25).

5. A method for controlling the quality of underwater cast-in-place pile concrete according to claim 4, characterized in that: A handle (210) is installed on the top of the position-limiting clamp (2), and a through hole is provided on the top of the handle (210) for vertical movement of the adjusting rod (22).

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