Device for anti-pulling detection of PHC (prestressed high-strength concrete) prestressed pipe pile

Abstract

The utility model relates to the technical field of foundation detection equipment, and particularly discloses a device for the uplift detection of a PHC prestressed pipe pile, which comprises a first mounting sleeve and a pipe pile body, first clamping devices are fixedly mounted at the two ends of the first mounting sleeve, a first inner abutting block, a connecting rod and a second inner abutting block are inserted into the pipe pile body, and the first clamping devices are fixedly mounted at the two ends of the first mounting sleeve. A first inner abutting block and a second inner abutting block make contact with the inner wall of the pipe pile body, then a wheel disc is rotated to drive an extrusion rod to rotate on a fixing ring till the extrusion rod penetrates into a limiting sleeve to abut against an extrusion piece plate, the wheel disc continues to be rotated to drive the extrusion rod to push the extrusion piece plate to the outer wall of the pipe pile body, and the extrusion piece plate is extruded till the pipe pile body is fixed and compacted by the extrusion piece plate; the first clamping device and the second clamping device are matched, a spiral connector does not need to be preset on the pipe pile body, and the technical problems that when an existing device is used, the pipe pile body can be damaged, and the accuracy of anti-pulling detection data is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation detection equipment, in particular to a device for anti-pulling detection of PHC prestressed pipe piles. Background Art

[0002] With the increasing importance of modern buildings and the continuous increase in the height of buildings, higher requirements are placed on the bearing capacity of the foundation. The natural foundation can no longer bear the load transmitted from the upper building very well. At present, prefabricated piles are often used as foundation piles in the construction process. The piles are pressed into the ground by a pile driver to become foundation piles, so that the upper part of the foundation piles can bear the building. The PHC prestressed concrete pipe pile is a prefabricated component. When it is used, it is sunk into the soil at the designed position by a pile sinking device. According to the requirements of the "Pile Foundation Design Code", the inspection test of PHC piles should be carried out after the construction of the pile foundation test piles and engineering piles is completed, so as to determine the bearing capacity of the single pile to be tested. At present, in the process of the vertical pull-out test of the single pile of PHC pipe piles, most of them use steel bars to embed steel bars in the core concrete of the prefabricated piles. However, the cost of embedding steel bars in the core concrete is relatively high, the process is complicated and the cycle is long.

[0003] At present, there is an existing pipe pile pull-out detection device (such as patent number: CN210031931U), which discloses a pipe pile pull-out detection device, which includes a prestressed pipe pile in a hollow cylindrical shape and an end plate fixedly arranged on the upper end of the prestressed pipe pile. Its technical points are: the upper end of the prestressed pipe pile is connected with a pulling assembly, the pulling assembly includes a pull-out base and a steel beam erected above the pull-out base, a jack is arranged between the two ends of the steel beam and the pull-out base, and a sleeve fixedly sleeved on the outside of the prestressed pipe pile is arranged at the center of the steel beam. The sleeve is provided with a plurality of resistance push rods at intervals along its circumference, the resistance push rod is threadedly connected to the sleeve, and the resistance push rod is rotatably connected to one end of the prestressed pipe pile with a resistance block. The utility model proposes a pipe pile pull-out detection device, which is provided with a pulling assembly so that the sleeve and the prestressed pipe pile are fixedly connected under the action of the resistance push rod and the resistance block, and the pulling assembly can be reused, which not only shortens the detection cycle but also saves the detection cost.

[0004] However, during the implementation of the above technical solution, it was found that there were at least the following technical problems:

[0005] 1. When the existing device is used, a spiral interface needs to be preset at the top of the pipe pile. The opening of the spiral interface will destroy the internal stress and strength of the pipe pile during the one-piece molding, affect the pull-out resistance of the pipe pile, and further affect the accuracy of the pull-out test data.

[0006] 2. The internal support assembly used in the existing device adopts rod-shaped structures such as screw rods, support rods and connecting rods. However, the force required for the pull-out test of the PHC piles used in construction projects is very large. Therefore, when pulling the pile pipe, these rod-shaped structures such as screw rods, support rods and connecting rods are prone to breakage, resulting in failure of the internal support device and damage to the test device. Utility Model Content

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the utility model provides a device for pull-out detection of PHC prestressed pipe piles, which solves the technical problems that the existing device will damage the pipe pile body when used, affecting the accuracy of the pull-out detection data, and the device is easily damaged when subjected to a large load.

[0009] (II) Technical solution

[0010] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0011] A device for anti-pulling detection of PHC prestressed pipe piles comprises a first mounting sleeve and a pipe pile body, first clamping devices are fixedly mounted at both ends of the first mounting sleeve, a second clamping device is fixedly arranged below the first clamping device, a mounting mechanism is also fixedly connected inside the first mounting sleeve, the mounting mechanism is rotatably connected to an internal support device, the first clamping device comprises a first mounting frame, the second clamping device comprises a second mounting sleeve, and the second mounting frames are fixedly connected at both ends of the second mounting sleeve.

[0012] Preferably: the first mounting frame is fixedly connected to both sides of the first mounting sleeve, the middle section of the first mounting frame is fixedly connected to a fixing ring, a threaded groove is provided in the fixing ring, both ends of the first mounting sleeve where the first mounting frame is provided are provided with sliding grooves, an extrusion plate is slidably connected in the sliding groove, the extrusion plate is fixedly connected to a limiting sleeve, an extrusion rod is rotatably sleeved in the fixing ring, the middle section of the extrusion rod is provided with a spiral pattern, the extrusion rod passes through the first mounting frame and is fixedly connected to a block at one end close to the first mounting sleeve, the extrusion rod is fixedly connected to a wheel disc at one end away from the first mounting sleeve, and a hexagonal nut is rotatably sleeved at one end of the extrusion rod located between the first mounting frame and the wheel disc.

[0013] Preferably, the mounting mechanism comprises a fixed beam, the fixed beam is fixedly connected to the inner side of the first mounting sleeve, the fixed beam is fixedly connected to a pull ring, and a threaded interface is provided at one end of the fixed beam away from the pull ring.

[0014] Preferably: the internal support device includes a threaded joint, which is rotatably connected to the threaded interface, and the threaded joint is fixedly connected to the first inner block, and the end of the first inner block away from the threaded joint is fixedly connected to a connecting rod, and the end of the connecting rod away from the first inner block is fixedly connected to the second inner block.

[0015] Preferably: the size of the second mounting frame is the same as that of the first mounting frame, the second mounting frame is provided with the same structural parts as the first mounting frame, the second mounting sleeve is also provided with a slide groove, an extruded plate is slidably connected in the slide groove, the direction in which the first mounting sleeve installs the first mounting frame is ninety degrees different from the direction in which the second mounting sleeve installs the second mounting frame, and the first mounting frame and the second mounting frame are cross-arranged.

[0016] Preferably, the central axes of the extrusion rod and the limiting sleeve are on the same parallel line, and the diameter of the extrusion rod is equal to the diameter of the opening of the limiting sleeve.

[0017] Preferably, the first installation sleeve and the second installation sleeve are sleeved inside the pipe pile body, and the first inner abutment block and the second inner abutment block extend into the inner side of the pipe pile body and contact the inner wall of the pipe pile body.

[0018] Preferably, the first inner abutment block is parallel to and opposite to the extruded plate installed on the first mounting sleeve, and the second inner abutment block is parallel to and opposite to the extruded plate installed on the second mounting sleeve.

[0019] (III) Beneficial effects

[0020] 1. First, the inner support device is screwed together through the threaded joint and the threaded interface, and then the device is sleeved on the top of the pipe pile body as a whole. The first installation sleeve and the second installation sleeve wrap the top of the pipe pile body, and the first inner resistance block, the connecting rod and the second inner resistance block are inserted into the interior of the pipe pile body. The first inner resistance block and the second inner resistance block are in contact with the inner wall of the pipe pile body, and then the wheel is rotated to drive the extrusion rod to rotate on the fixing ring until the extrusion rod is deeply inserted into the limit sleeve to support the extrusion plate, and the wheel is continued to be rotated to drive the extrusion rod to push the extrusion plate to the outer wall of the pipe pile body. Because the inner wall of the pipe pile body is supported by the first inner resistance block, the pipe pile body will not be damaged by the extrusion plate. The extrusion plate is squeezed until the pipe pile body is fixed tightly by the extrusion plate. The first clamping device and the second clamping device are used in combination, and there is no need to preset a spiral interface on the pipe pile body, which solves the technical problem that the existing device will damage the pipe pile body when used and affect the accuracy of the pull-out test data.

[0021] Second, the first inner abutment block and the second inner abutment block, which are simple to manufacture and have a strong structure, are used for internal support to prevent the pile body from being squeezed and damaged. There is no need to use a more complicated rod-shaped structure, which solves the problem that the existing device is easily damaged when subjected to a large load. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0023] Figure 1This is the overall structure diagram of the device of the utility model;

[0024] Figure 2 This is a structural diagram of the first installation sleeve and the inner support device of the utility model;

[0025] Figure 3 This is an exploded structural diagram of the first installation sleeve of the utility model;

[0026] Figure 4 This is the internal structure diagram of the first installation sleeve of the utility model;

[0027] Figure 5 This is a structural diagram of the inner support device of the utility model.

[0028] Legend: 1. First mounting sleeve; 2. Fixed beam; 3. Second mounting sleeve; 4. Extruded plate; 5. Threaded joint; 6. Fixed ring; 7. Wheel; 8. Pipe pile body; 101. First mounting frame; 102. Slide groove; 201. Pull ring; 202. Threaded interface; 301. Second mounting frame; 401. Limit sleeve; 501. First inner block; 502. Connecting rod; 503. Second inner block; 701. Hexagonal nut; 702. Extrusion rod; 703. Stop block; 704. Spiral pattern. DETAILED DESCRIPTION

[0029] The embodiment of the present application provides a device for pull-out detection of PHC prestressed pipe piles, which effectively solves the problem that the existing device will damage the pipe pile body when used, affecting the accuracy of the pull-out detection data, and the device is easily damaged when subjected to a large load.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that the existing device will damage the pipe pile body when used, affecting the accuracy of the pull-out test data, and the device is easily damaged when subjected to a large load. The overall idea is as follows:

[0031] In view of the problems existing in the prior art, the utility model provides a device for pull-out detection of PHC prestressed pipe piles, comprising a first mounting sleeve 1 and a pipe pile body 8, first clamping devices are fixedly installed at both ends of the first mounting sleeve 1, a second clamping device is fixedly arranged below the first clamping device, a mounting mechanism is also fixedly connected inside the first mounting sleeve 1, the mounting mechanism is rotatably connected to an internal supporting device, the first clamping device comprises a first mounting frame 101, the second clamping device comprises a second mounting sleeve 3, and second mounting frames 301 are fixedly connected at both ends of the second mounting sleeve 3.

[0032] The first mounting frame 101 is fixedly connected to both sides of the first mounting sleeve 1, and the middle section of the first mounting frame 101 is fixedly connected with a fixing ring 6, and a threaded groove is provided in the fixing ring 6. The first mounting sleeve 1 is provided with sliding grooves 102 at both ends where the first mounting frame 101 is provided, and an extrusion plate 4 is slidably connected in the sliding groove 102, and the extrusion plate 4 is fixedly connected with a limiting sleeve 401. An extrusion rod 702 is rotatably sleeved in the fixing ring 6, and a spiral pattern 704 is provided in the middle section of the extrusion rod 702. The extrusion rod 702 passes through the first mounting frame 101 and is fixedly connected with a stopper 703 at one end close to the first mounting sleeve 1, and a wheel disc 7 is fixedly connected to one end of the extrusion rod 702 away from the first mounting sleeve 1, and a hexagonal nut 701 is rotatably sleeved at one end of the extrusion rod 702 located between the first mounting frame 101 and the wheel disc 7.

[0033] The installation mechanism includes a fixed beam 2 , which is fixedly connected to the inner side of the first installation sleeve 1 , and is fixedly connected to a pull ring 201 . A threaded interface 202 is provided at one end of the fixed beam 2 away from the pull ring 201 .

[0034] The inner support device includes a threaded joint 5, which is rotatably connected to the threaded interface 202. The threaded joint 5 is fixedly connected to a first inner block 501. The end of the first inner block 501 away from the threaded joint 5 is fixedly connected to a connecting rod 502. The end of the connecting rod 502 away from the first inner block 501 is fixedly connected to a second inner block 503.

[0035] The size of the second mounting frame 301 is the same as that of the first mounting frame 101. The second mounting frame 301 is provided with the same structural parts as those of the first mounting frame 101. The second mounting sleeve 3 is also provided with a slide groove 102, and an extruded plate 4 is slidably connected in the slide groove 102. The direction in which the first mounting sleeve 1 installs the first mounting frame 101 is ninety degrees different from the direction in which the second mounting sleeve 3 installs the second mounting frame 301. The first mounting frame 101 and the second mounting frame 301 are cross-arranged.

[0036] The central axes of the extrusion rod 702 and the limiting sleeve 401 are on the same parallel line, and the diameter of the extrusion rod 702 is equal to the diameter of the opening of the limiting sleeve 401 .

[0037] The first installation sleeve 1 and the second installation sleeve 3 are sleeved inside the pipe pile body 8 , and the first inner abutment block 501 and the second inner abutment block 503 extend into the inner side of the pipe pile body 8 and contact with the inner wall of the pipe pile body 8 .

[0038] The first inner abutment block 501 is parallel to and opposite to the extruded plate 4 installed on the first installation sleeve 1 , and the second inner abutment block 503 is parallel to and opposite to the extruded plate 4 installed on the second installation sleeve 3 .

[0039] First, the inner support device is screwed together with the threaded joint 5 and the threaded interface 202, and then the device is sleeved on the top of the pile body 8. The first installation sleeve 1 and the second installation sleeve 3 wrap the top of the pile body 8, and the first inner abutment block 501, the connecting rod 502 and the second inner abutment block 503 are inserted into the interior of the pile body 8. The first inner abutment block 501 and the second inner abutment block 503 are in contact with the inner wall of the pile body 8, and then the wheel 7 is rotated to drive the extrusion rod 702 to rotate on the fixing ring 6 until the extrusion rod 702 penetrates into the limiting sleeve 401 to support the extrusion plate 4, and the wheel 7 is continued to be rotated to drive the extrusion rod 702 to extrusion the extrusion plate 4. The plate 4 is pushed toward the outer wall of the pipe pile body 8. Because the inner wall of the pipe pile body 8 is supported by the first inner support block 501, the pipe pile body 8 will not be damaged by the extrusion plate 4. The extrusion plate 4 is squeezed until the pipe pile body 8 is firmly fixed by the extrusion plate 4, and the hexagonal nut 701 is rotated to contact the fixing ring 6 to stop the extrusion rod 702 from rotating. After the first clamping device and the second clamping device are fixed, the pull ring 201 is pulled by the detection device to detect the pipe pile body 8, which solves the technical problems that the existing device will damage the pipe pile body when used, affecting the accuracy of the pull-out test data, and the device is easily damaged when subjected to a large load.

[0040] Working principle:

[0041] In the first step, the inner support device is firstly screwed with the threaded joint 5 and the threaded interface 202, and then the device is sleeved on the top of the pile body 8. The first installation sleeve 1 and the second installation sleeve 3 wrap the top of the pile body 8, and the first inner abutment block 501, the connecting rod 502 and the second inner abutment block 503 are inserted into the interior of the pile body 8. The first inner abutment block 501 and the second inner abutment block 503 are in contact with the inner wall of the pile body 8, and then the wheel 7 is rotated to drive the extrusion rod 702 to rotate on the fixing ring 6 until the extrusion rod 702 penetrates into the limit sleeve 4. 01, and continue to rotate the wheel disc 7 to drive the extrusion rod 702 to push the extrusion plate 4 to the outer wall of the pipe pile body 8. Because the inner wall of the pipe pile body 8 is supported by the first inner support block 501, the pipe pile body 8 will not be squeezed and damaged by the extrusion plate 4. Squeeze the extrusion plate 4 until the pipe pile body 8 is firmly fixed by the extrusion plate 4, rotate the hexagonal nut 701 to contact the fixing ring 6, and stop the extrusion rod 702 from rotating. After the first clamping device and the second clamping device are fixed, use the detection device to pull the pull ring 201 to detect the pipe pile body 8.

[0042] In the second step, when testing the smaller-sized pipe pile body 8, the internal support devices of different types and sizes can be rotated and connected through the threaded interface 202 to support the inner wall of the pipe pile body 8, and the extrusion plate 4 can slide on the slide groove 102. As the rotation of the wheel plate 7 drives the extrusion rod 702 to continue to squeeze, the extrusion plate 4 can continue to squeeze toward the inner wall of the first mounting sleeve 1 and the second mounting sleeve 3, contacting the outer wall of the smaller pipe pile body 8, and playing a clamping and fixing role. The first mounting frame 101 and the second mounting frame 301 have different installation directions, and the four sides of the pipe pile body 8 are clamped, so that the pipe pile body 8 is fixed more stably and the detection data is more accurate.

[0043] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A device for detecting the pull-out resistance of a PHC prestressed pipe pile, comprising a first mounting sleeve (1) and a pipe pile body (8), characterized in that: The first mounting sleeve (1) has first clamping devices fixedly mounted on both ends thereof, a second clamping device fixedly mounted below the first clamping device, a mounting mechanism fixedly connected inside the first mounting sleeve (1), and the mounting mechanism rotatably connected to an internal support device; Wherein, the first clamping device comprises a first mounting frame (101); Wherein, the second clamping device comprises a second mounting sleeve (3), and both ends of the second mounting sleeve (3) are fixedly connected to a second mounting frame (301).

2. A device for anti-pulling detection of PHC prestressed pipe piles according to claim 1, characterized in that: The first mounting frame (101) is fixedly connected to both sides of the first mounting sleeve (1); the middle section of the first mounting frame (101) is fixedly connected to a fixing ring (6); a threaded groove is provided in the fixing ring (6); both ends of the first mounting sleeve (1) where the first mounting frame (101) is provided are provided with sliding grooves (102); an extrusion plate (4) is slidably connected in the sliding grooves (102); the extrusion plate (4) is fixedly connected to a limiting sleeve (401); the fixing ring (6) is rotatable in the fixing ring (6); An extrusion rod (702) is sleeved, a spiral pattern (704) is provided in the middle section of the extrusion rod (702), one end of the extrusion rod (702) passing through the first mounting frame (101) and close to the first mounting sleeve (1) is fixedly connected to a stopper (703), one end of the extrusion rod (702) away from the first mounting sleeve (1) is fixedly connected to a wheel disc (7), and one end of the extrusion rod (702) located between the first mounting frame (101) and the wheel disc (7) is rotatably sleeved with a hexagonal nut (701).

3. A device for anti-pulling detection of PHC prestressed pipe piles as claimed in claim 2, characterized in that: The mounting mechanism comprises a fixed beam (2), the fixed beam (2) being fixedly connected to the inner side of the first mounting sleeve (1), the fixed beam (2) being fixedly connected to a pull ring (201), and a threaded interface (202) being provided at one end of the fixed beam (2) away from the pull ring (201).

4. A device for anti-pulling detection of PHC prestressed pipe piles as claimed in claim 3, characterized in that: The inner support device comprises a threaded joint (5), the threaded joint (5) is rotatably connected to the threaded interface (202), the threaded joint (5) is fixedly connected to a first inner resistance block (501), one end of the first inner resistance block (501) away from the threaded joint (5) is fixedly connected to a connecting rod (502), and one end of the connecting rod (502) away from the first inner resistance block (501) is fixedly connected to a second inner resistance block (503).

5. A device for anti-pulling detection of PHC prestressed pipe piles as claimed in claim 4, characterized in that: The size of the second mounting frame (301) is the same as that of the first mounting frame (101); the second mounting frame (301) is provided with the same structural components as those of the first mounting frame (101); the second mounting sleeve (3) is also provided with a slide groove (102); and an extruded plate (4) is slidably connected to the slide groove (102); The direction in which the first mounting sleeve (1) mounts the first mounting frame (101) differs by ninety degrees from the direction in which the second mounting sleeve (3) mounts the second mounting frame (301), and the first mounting frame (101) and the second mounting frame (301) are arranged in a cross shape.

6. A device for anti-pulling detection of PHC prestressed pipe piles as claimed in claim 5, characterized in that: The central axes of the extrusion rod (702) and the limiting sleeve (401) are on the same parallel line, and the diameter of the extrusion rod (702) is equal to the diameter of the opening of the limiting sleeve (401).

7. A device for anti-pulling detection of PHC prestressed pipe piles as claimed in claim 6, characterized in that: The first installation sleeve (1) and the second installation sleeve (3) are sleeved inside the pipe pile body (8), and the first inner abutment block (501) and the second inner abutment block (503) extend into the inner side of the pipe pile body (8) and contact the inner wall of the pipe pile body (8).

8. A device for anti-pulling detection of PHC prestressed pipe piles as claimed in claim 7, characterized in that: The first inner abutment block (501) is parallel to and opposite to the extrusion plate (4) installed on the first installation sleeve (1), and the second inner abutment block (503) is parallel to and opposite to the extrusion plate (4) installed on the second installation sleeve (3).

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