A coupling positioning device for pile foundation low strain detection

Abstract

The application discloses a coupling positioning device for pile foundation low-strain detection, and relates to the technical field of pile foundation detection.The device comprises a mounting plate, a protection mechanism is arranged on the mounting plate, the protection mechanism comprises a supporting arm, the supporting arm is arranged on one side of the mounting plate, a positioning ring is fixedly connected to the side of the supporting arm away from the mounting plate, a plurality of limiting pieces are rotatably connected in the positioning ring, the same number of rubber blocks as the limiting pieces are fixedly connected in the positioning ring, the rubber blocks are located between the limiting pieces and the positioning ring, the limiting pieces are arranged in an arc shape, and the limiting pieces are used for reducing the distance through which a detection head moves away from the pile foundation.The protection mechanism is arranged, when the detection head in the prior art detects the pile foundation, under the cooperation of the positioning ring and the limiting pieces, when external force or other factors interfere, the detection head can be prevented from moving away from the pile foundation through the action of the limiting pieces, the prior art is overcome, the adhesion effect of the detection head and the pile foundation is ensured, and the accuracy of detection results during use is improved.

Description

Technical Field

[0001] This invention relates to the field of pile foundation testing technology, specifically to a coupling positioning device for low strain testing of pile foundations. Background Technology

[0002] In highway bridge and tunnel engineering, pile foundations are the core load-bearing components, and their integrity testing is a key link in ensuring project quality. The low-strain reflected wave method is widely used in pile foundation integrity testing due to its convenient operation and low cost.

[0003] The core of the detection method is to use a sensor to collect the reflected wave signal of the pile body by hammering a designated position on the top of the pile foundation, thereby determining whether there are defects such as pile breakage or necking. The coupling effect between the sensor and the pile body and the positioning accuracy of the hammering point directly affect the authenticity and accuracy of the detection data.

[0004] Although the above-mentioned detection device can detect pile foundations well, in actual use, the sensor is often fixed by hand-pressing or simply pasting. Especially on rough pile surfaces, if there is wind or other external force during the detection process, the detection head is prone to shaking, making it difficult to ensure that the sensor is in close contact with the pile body for a long time, resulting in signal attenuation and increased noise. Summary of the Invention

[0005] In view of this, the present invention proposes a coupling positioning device for low strain detection of pile foundations to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coupling positioning device for low strain testing of pile foundations, comprising a mounting plate, a protective mechanism provided on the mounting plate, the protective mechanism comprising a support arm, the support arm being disposed on one side of the mounting plate, a positioning ring being fixedly connected to the side of the support arm away from the mounting plate, a plurality of limiting plates being rotatably connected inside the positioning ring, and a number of rubber blocks equal to the number of limiting plates being fixedly connected inside the positioning ring, the rubber blocks being located between the limiting plates and the positioning ring, the limiting plates being arc-shaped, the limiting plates being used to reduce the distance the detection head moves away from the pile foundation.

[0007] Preferably, the protective mechanism further includes a limiting block fixedly connected to the top of the positioning ring, the number of the limiting blocks being the same as the limiting piece, and one end of the limiting block contacting the limiting piece.

[0008] Preferably, the end of the limiting block that contacts the limiting piece is arc-shaped.

[0009] Preferably, a flexible pad is embedded in the limiting piece.

[0010] Preferably, at least two guide posts are slidably connected to the mounting plate, the guide posts are fixedly connected to the support arm, and a sliding rod is slidably connected to the mounting plate, the sliding rod being fixedly connected to the support arm.

[0011] Preferably, the mounting plate is threaded with a fastening bolt, which abuts against the sliding rod by rotation.

[0012] Preferably, at least two insert rods are fixedly connected to the bottom of the mounting plate.

[0013] Preferably, the bottom of the insertion rod is tapered.

[0014] Compared with the prior art, the present invention provides a coupling positioning device for low strain detection of pile foundations, which has the following beneficial effects:

[0015] 1. By setting up a protective mechanism, this invention prevents the detection head from moving away from the pile foundation when the detection head in the prior art is used to detect the pile foundation. With the cooperation of the positioning ring and the limiting plate, when there is interference from external force or other factors, the limiting plate can prevent the detection head from moving away from the pile foundation, reduce the shaking amplitude, overcome the shortcomings of the prior art, ensure the fit between the detection head and the pile foundation, and improve the accuracy of the detection results during use.

[0016] 2. The present invention, through the setting of guide columns, sliding rods and fastening bolts, can adjust the position according to the detection location. At the same time, through the setting of the insertion rod, it can be inserted into the ground next to the pile foundation, which improves the applicability of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional view of the positioning ring of the present invention;

[0019] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This is a partial three-dimensional structural diagram of the positioning ring of the present invention.

[0021] In the picture:

[0022] 100. Mounting plate; 101. Support arm; 102. Positioning ring; 103. Limiting plate; 104. Rubber block; 105. Limiting block; 106. Flexible gasket;

[0023] 111. Guide post; 112. Sliding rod; 113. Fastening bolt;

[0024] 121. Insert rod. Detailed Implementation

[0025] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, some features described in the examples may be combined in other examples.

[0026] Example 1

[0027] like Figures 1 to 3 As shown, this embodiment provides a coupling positioning device for low strain detection of pile foundations, including a mounting plate 100, on which a protective mechanism is provided;

[0028] The protective mechanism includes a support arm 101, which is disposed on one side of the mounting plate 100. A positioning ring 102 is fixedly connected to the side of the support arm 101 away from the mounting plate 100. A plurality of limiting plates 103 are rotatably connected inside the positioning ring 102. A number of rubber blocks 104, the same number as the limiting plates 103, are fixedly connected inside the positioning ring 102. The rubber blocks 104 are located between the limiting plates 103 and the positioning ring 102. The limiting plates 103 are arc-shaped and are used to reduce the distance the detection head moves away from the pile foundation. In this embodiment, the support arm 101 can be fixed to the mounting plate 100.

[0029] The protective mechanism also includes a limiting block 105 fixedly connected to the top of the positioning ring 102. The number of limiting blocks 105 is the same as that of the limiting pieces 103, and one end of the limiting block 105 is in contact with the limiting piece 103.

[0030] Furthermore, the end of the limiting block 105 that contacts the limiting piece 103 is set to be arc-shaped, and the contact surfaces of the two fit together to ensure the limiting effect and reduce the stress during contact.

[0031] Furthermore, a flexible pad 106 is embedded in the limiting piece 103, which improves the comfort of squeezing the limiting piece 103 when the finger squeezes it.

[0032] Furthermore, at least two insertion rods 121 are fixedly connected to the bottom of the mounting plate 100. The bottom of the insertion rods 121 is set in a conical shape, which makes it easy to insert into the ground during use.

[0033] Example 2

[0034] like Figures 1 to 4As shown, this embodiment provides a coupling positioning device for low strain testing of pile foundations, including a mounting plate 100. A protective mechanism is provided on the mounting plate 100, including a support arm 101. The support arm 101 is located on one side of the mounting plate 100. A positioning ring 102 is fixedly connected to the side of the support arm 101 away from the mounting plate 101. A plurality of limiting plates 103 are rotatably connected inside the positioning ring 102. A number of rubber blocks 104, the same number as the limiting plates 103, are fixedly connected inside the positioning ring 102. The rubber blocks 104 are located between the limiting plates 103 and the positioning ring 102. 03 is set to be arc-shaped. The limiting plate 103 is used to reduce the distance that the detection head moves away from the pile foundation. The protective mechanism also includes a limiting block 105 fixedly connected to the top of the positioning ring 102. The number of limiting blocks 105 is the same as that of the limiting plate 103. One end of the limiting block 105 is in contact with the limiting plate 103. The end of the limiting block 105 in contact with the limiting plate 103 is set to be arc-shaped. The contact surfaces between the two are in close contact with each other to ensure the limiting effect and reduce the stress during contact. At least two insert rods 121 are fixedly connected to the bottom of the mounting plate 100. A flexible gasket 106 is embedded on the limiting plate 103.

[0035] At least two guide posts 111 are slidably connected to the mounting plate 100. The guide posts 111 are fixedly connected to the support arm 101. A sliding rod 112 is slidably connected to the mounting plate 100. The sliding rod 112 is fixedly connected to the support arm 101. A fastening bolt 113 is threadedly connected to the mounting plate 100. The fastening bolt 113 abuts against the sliding rod 112 by rotation.

[0036] In this embodiment, the guide post 111, sliding rod 112 and fastening bolt 113 can be used to adjust the position according to the detection location, which improves the applicability of the device.

[0037] Example 3

[0038] like Figures 1 to 4 As shown, this embodiment provides a coupling positioning device for low strain testing of pile foundations, including a mounting plate 100. A protective mechanism is provided on the mounting plate 100. The protective mechanism includes a support arm 101, which is located on one side of the mounting plate 100. A positioning ring 102 is fixedly connected to the side of the support arm 101 away from the mounting plate 100. A plurality of limiting plates 103 are rotatably connected inside the positioning ring 102. A number of rubber blocks 104, the same number as the limiting plates 103, are fixedly connected inside the positioning ring 102. The rubber blocks 104 are located between the limiting plates 103 and the positioning ring 102. The limiting plates 103 are arc-shaped and are used to reduce the distance the detection head moves away from the pile foundation.

[0039] The protective mechanism also includes a limiting block 105 fixedly connected to the top of the positioning ring 102. The number of limiting blocks 105 is the same as that of the limiting plates 103. One end of the limiting block 105 is in contact with the limiting plate 103. The end of the limiting block 105 in contact with the limiting plate 103 is set in an arc shape. A flexible gasket 106 is embedded in the limiting plate 103. At least two guide posts 111 are slidably connected to the mounting plate 100. The guide posts 111 are fixedly connected to the support arm 101. A sliding rod 112 is slidably connected to the mounting plate 100. The sliding rod 112 is fixedly connected to the support arm 101. A fastening bolt 113 is threadedly connected to the mounting plate 100. The fastening bolt 113 abuts against the sliding rod 112 by rotation. At least two insert rods 121 are fixedly connected to the bottom of the mounting plate 100. The bottom of the insert rods 121 is set in a conical shape.

[0040] A laser light is fixedly connected to the outer surface of the positioning ring 102, with the laser light facing downwards. When the device is in use, positioning is achieved by using the light from the laser light, which can improve the accuracy of positioning.

[0041] The following explains the working principle and beneficial effects of protective mechanisms:

[0042] When the testing device needs to test the pile foundation, the insertion rod 121 at the bottom of the mounting plate 100 is first inserted into the ground next to the pile foundation to fix the mounting plate 100, so that the bottom of the positioning ring 102 is above the coupling point between the pile foundation and the testing head. When the testing head needs to be in contact with the pile foundation, the testing head of the testing device is inserted into the positioning ring 102. When inserted, the outer surface of the testing head will press the arc-shaped surface of the limiting piece 103, causing the limiting piece 103 to move away from the testing head, thereby compressing the rubber block 104. The rubber block 104 is compressed. In the prior art, since the cross-sectional shape of the testing head is inverted T-shaped, the bottom diameter is larger than the top diameter. The part with the larger bottom diameter compresses the limiting piece 103 until the larger part is offset from the limiting piece 103. Then the rubber block 104 rebounds, so that the limiting piece 103 is above the part with the larger diameter of the testing head and clamps and contacts the part with the smaller diameter. Figure 2 As shown, at this time, the detection head is coupled with the pile foundation under the action of the coupling agent. At the same time, under the action of the limiting plate 103, the limiting plate 103 abuts against the upper part of the larger diameter of the detection head and is in a perpendicular state to the bottom of the detection head. Under the limitation of the limiting block 105, the limiting plate 103 cannot rotate upward. When there is external force or other factors interfering during the detection process, the limiting plate 103 can prevent the detection head from moving away from the pile foundation, ensuring the fit between the detection head and the pile foundation and improving the accuracy of the detection results during use.

[0043] When the detection head is no longer in use and needs to be removed, the operator slides their fingers from top to bottom, with the number of fingers equal to the number of limiting plates 103. The operator grips the detection head with their fingers, positioned between the flexible pad 106 and the outer surface of the detection head. As the fingers slide downwards, they enter the space between the flexible pad 106 and the detection head, squeezing the limiting plates 103 and causing them to rotate away from the detection head. This provides sufficient control space between the limiting plates 103, allowing the larger portion of the bottom of the detection head to be removed. After the operator's fingers grip the detection head and are positioned in the space between the flexible pad 106 and the detection head, they pull the detection head upwards to remove it, thus enabling the next detection operation. The flexible pad 106 also improves the comfort of squeezing the limiting plates 103.

[0044] By setting up a protective mechanism, when the detection head in the existing technology is used to detect the pile foundation, with the cooperation of the positioning ring 102 and the limiting plate 103, when there is interference from external forces or other factors, the limiting plate 103 can prevent the detection head from moving away from the pile foundation, thus overcoming the limitations of the existing technology, ensuring the fit between the detection head and the pile foundation, and improving the accuracy of the detection results during use.

[0045] Furthermore, by setting up the guide post 111, the sliding rod 112, and the fastening bolt 113, when it is necessary to adjust the detection part, the insertion rod 121 can be pulled out from the ground and then inserted into a part adjacent to the detection point and in the same straight line. Then, by sliding the guide post 111 and the sliding rod 112, the support arm 101 is moved to move the positioning ring 102 above the detection part. Then, the fastening bolt 113 is rotated to fix the sliding rod 112, so that the new detection part can be detected again.

[0046] With the guide post 111, sliding rod 112 and fastening bolt 113, the position can be adjusted according to the detection location. At the same time, with the insertion rod 121, it can be inserted into the ground next to the pile foundation. Compared with the positioning device in the prior art, some positioning devices need to be installed in the inner ring of the annular pile foundation. When the pile foundation is a solid column pile foundation, this positioning device cannot be used. Therefore, this setting improves the applicability of the device. The positioning device is not installed with the pile foundation. When the pile foundation is hit, the vibration of the pile foundation will not cause the positioning device to vibrate at the same time.

[0047] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A coupling positioning device for low strain testing of pile foundations, comprising a mounting plate (100), characterized in that, The mounting plate (100) is provided with a protective mechanism; The protective mechanism includes a support arm (101), which is located on one side of the mounting plate (100). A positioning ring (102) is fixedly connected to the side of the support arm (101) away from the mounting plate (100). Several limiting plates (103) are rotatably connected inside the positioning ring (102). Rubber blocks (104) of the same number as the limiting plates (103) are fixedly connected inside the positioning ring (102). The rubber blocks (104) are located between the limiting plates (103) and the positioning ring (102). The limiting plates (103) are arc-shaped and are used to reduce the distance that the detection head moves away from the pile foundation.

2. The coupling positioning device for low strain testing of pile foundations according to claim 1, characterized in that: The protective mechanism also includes a limiting block (105) fixedly connected to the top of the positioning ring (102). The number of the limiting blocks (105) is the same as that of the limiting pieces (103), and one end of each limiting block (105) is in contact with the adjacent limiting piece (103).

3. The coupling positioning device for low strain testing of pile foundations according to claim 2, characterized in that: The end of the limiting block (105) that contacts the limiting piece (103) is set to be arc-shaped.

4. The coupling positioning device for low strain testing of pile foundations according to claim 1, characterized in that: A flexible gasket (106) is embedded on the limiting piece (103).

5. The coupling positioning device for low strain testing of pile foundations according to claim 1, characterized in that: At least two guide posts (111) are slidably connected to the mounting plate (100), the guide posts (111) are fixedly connected to the support arm (101), and a sliding rod (112) is slidably connected to the mounting plate (100), the sliding rod (112) is fixedly connected to the support arm (101).

6. The coupling positioning device for low strain testing of pile foundations according to claim 5, characterized in that: The mounting plate (100) is threaded with a fastening bolt (113), which abuts against the sliding rod (112) by rotation.

7. The coupling positioning device for low strain testing of pile foundations according to claim 1, characterized in that: At least two insert rods (121) are fixedly connected to the bottom of the mounting plate (100).

8. The coupling positioning device for low strain testing of pile foundations according to claim 7, characterized in that: The bottom of the insertion rod (121) is tapered.

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