Foundation pile low strain detector
By designing an annular base and sliding structure in the low-strain detector of the foundation pile, the guiding support and position adjustment of the acceleration sensor is achieved, which solves the problem of easy skewness of the sensor and frequent application of coupling agent, and improves the detection efficiency and accuracy of the results. .
Patent Information
- Application Number
- CN202420228877.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-01-31
AI Technical Summary
During the inspection process of existing foundation pile low-strain detectors, the acceleration sensor is prone to skew or tilt, resulting in inaccurate detection results, and the coupling agent needs to be frequently applied and re-bonded, which affects the detection efficiency.
A low-strain detector for foundation piles including an annular base, a sliding structure and a connecting rod was designed. Through the coordination of the sliding structure and the connecting rod, the guiding support and position adjustment of the acceleration sensor is realized to ensure the accurate adhesion between the sensor and the coupling agent. catch.
It improves detection efficiency, ensures the accuracy and reliability of detection results, reduces the frequency of coupling agent use, and improves the reliability of detection positions.
Smart Images
Figure CN222295091U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pile foundation detection, in particular to a pile foundation low strain detector. Background Art
[0002] As the bottom of the building, the integrity of the low-strain pile is related to the safety of the entire building. The detection of the integrity of the pile is an indispensable step in the construction process, so it is of great significance to the development of the low-strain pile detector. The detection is mainly carried out from the center of the pile to the circumference, and at multiple positions about two-thirds of the distance from the center of the circle, the detection process requires the use of an accelerometer to receive the stress wave signal reflected by the pile body. In order to ensure the accuracy of the test results, the accelerometer needs to be placed on the top end face of the pile. In order to reduce the influence of the pores between the accelerometer and the end face of the pile on the conduction of the stress wave, it is usually necessary to apply a coupling agent to the bottom of the accelerometer, and then bond the bottom of the accelerometer to the end face of the pile.
[0003] The coupling agent is generally in gel form, and there is a certain thickness of coupling agent between the accelerometer and the end face of the pile. During the detection process, the accelerometer is very likely to tilt or even fall over, affecting the accuracy of the detection results. It is necessary to repeatedly apply the coupling agent and re-bond the accelerometer, affecting the detection efficiency. Summary of the invention
[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide a pile low-strain detector that can guide and support the sensor, facilitate position adjustment, and has high detection efficiency.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A pile foundation low strain detector comprises a base, which is annular in shape. A slide is installed on the base via a sliding structure. One end of the slide extends into the base. A long groove is provided on the slide. A sleeve is slidably fitted in the long groove. A limiting block is fixed to the outer side of the lower end of the sleeve. An external thread is provided on the outer side of the upper end of the sleeve. A nut is threadedly connected to the upper end of the sleeve. Lugs are protruding on both sides of the nut. A connecting rod is slidably fitted in the sleeve. The lower end of the connecting rod is fixedly connected to the housing of an acceleration sensor. The connecting rod is hollow.
[0007] Thus, when in use, the base is placed outside the pile, the nut is turned and driven to move upward, and after adjusting the position of the sleeve relative to the long slot, the nut is turned and moved downward, the limit block abuts against the slide, and the sleeve is fixed relative to the slide with the nut. Coupling agent is applied to the pile, and the sliding structure is set to facilitate the movement of the slide. When the acceleration sensor is facing the coupling agent, the connecting rod is pushed downward, and the sleeve guides the connecting rod. The detection end of the acceleration sensor is driven to bond with the coupling agent through the connecting rod, and the cable of the acceleration sensor passes through the connecting rod and is connected to the low strain detector body. Then, the center of the pile is struck by a hammer, and the acceleration sensor detects the signal and transmits it to the low strain detector body, and the result is displayed on the low strain detector body.
[0008] Wherein, the sliding structure comprises an annular track arranged at the upper end of the base, a sliding block is slidably fitted on the annular track, and the sliding block is fixedly connected to the sliding seat.
[0009] Wherein, the base and the annular track are integrally formed.
[0010] Wherein, a guide rail clamp is installed on the sliding block.
[0011] Wherein, handles are fixedly installed on both sides of the base.
[0012] In summary, the pile foundation low strain detector has the advantages of being able to guide and support the sensor, facilitating position adjustment, and having high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The utility model is a schematic structural diagram of a pile foundation low strain detector.
[0014] Figure 2 for Figure 1 Another schematic diagram.
[0015] Figure 3 It is a partially enlarged schematic diagram of a pile foundation low strain detector described in the utility model. DETAILED DESCRIPTION
[0016] The present invention is further described in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "upper, lower" and "top, bottom" are usually 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. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0017] like Figure 1-3 As shown, a pile foundation low strain detector comprises a base 1, which is annular, and a slide 2 is installed on the base through a sliding structure, one end of the slide extends into the base, and a long slot 3 is provided on the slide, and a sleeve 4 is slidably fitted in the long slot, and a limit block 5 is fixed on the outer side of the lower end of the sleeve, and a clearance hole is provided through the limit block directly opposite to the perforation of the sleeve, and an external thread is provided on the outer side of the upper end of the sleeve, and a nut 6 is threadedly connected to the upper end of the sleeve, and lugs 7 are protruding on both sides of the nut, and a connecting rod 8 is slidably fitted in the sleeve, and the connecting rod passes through the clearance hole and is fixedly connected to the housing of the acceleration sensor 9, and the connecting rod is hollow. The cable of the acceleration sensor passes through the connecting rod and is connected to the low strain detector body (not shown).
[0018] Thus, when in use, the base is placed outside the pile, the nut is turned and driven to move upward, and after adjusting the position of the sleeve relative to the long slot, the nut is turned and moved downward, the limit block abuts against the slide seat, and the sleeve is fixed relative to the slide seat by the nut. Coupling agent is applied to the pile, and the sliding structure is set to facilitate the movement of the slide seat. When the acceleration sensor is facing the coupling agent, the connecting rod is pushed downward, and the sleeve guides the connecting rod. The connecting rod drives the detection end of the acceleration sensor to bond with the coupling agent. The cable of the acceleration sensor passes through the connecting rod and is connected to the low strain detector body. Then, the center of the pile is struck by a hammer, and the acceleration sensor detects the signal and transmits it to the low strain detector body and displays the result on the low strain detector body. The sleeve supports and guides the connecting rod, thereby realizing the support and guidance of the acceleration sensor. The low strain detector body is an existing structure.
[0019] During implementation, the sliding structure includes an annular track 10 arranged at the upper end of the base, and a slider 11 is slidably matched on the annular track, and the slider is fixedly connected to the slide seat. It is convenient to install the slide seat and adjust the position of the slide seat. The detection point is located at a position two-thirds of the distance from the pile to the center of the circle. By setting the annular guide rail, it is convenient to improve the position reliability of the detection position and further improve the reliability of the detection result.
[0020] During implementation, the base and the annular track are integrally formed, which is convenient for manufacturing.
[0021] During implementation, a guide rail clamp 12 is installed on the slide block, so as to facilitate fixing the slide block at a desired position. The guide rail clamp is an existing structure and can be directly installed and used.
[0022] During implementation, handles 13 are fixedly mounted on both sides of the base to facilitate overall movement.
[0023] When adjusting the position of the acceleration sensor, release the clamp, pull the connecting rod upward, the acceleration sensor is separated from the coupling agent or the surface of the pile, then slide the slide to the required position, apply the coupling agent on the surface of the pile, release the connecting rod, and drive the connecting rod to move downward. The detection end of the acceleration sensor is bonded to the coupling agent, and then the position of the slide is locked by the clamp.
[0024] Finally, it should be noted that those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.
Claims
1. A pile low strain detector, characterized in that: It includes a base, which is annular in shape. A slide is installed on the base through a sliding structure. One end of the slide extends into the base. A long groove is opened on the slide. A sleeve is slidably fitted in the long groove. A limiting block is fixed on the outer side of the lower end of the sleeve. An external thread is arranged on the outer side of the upper end of the sleeve. A nut is threadedly connected to the upper end of the sleeve. Support ears are protruding on both sides of the nut. A connecting rod is slidably fitted in the sleeve. The lower end of the connecting rod is fixedly connected to the outer shell of the acceleration sensor. The connecting rod is hollow.
2. A pile foundation low strain detector according to claim 1, characterized in that: The sliding structure comprises an annular track arranged at the upper end of the base, a sliding block is slidably matched on the annular track, and the sliding block is fixedly connected to the sliding seat.
3. A pile foundation low strain detector according to claim 2, characterized in that: The base and the annular track are formed in one piece.
4. A pile foundation low strain detector according to claim 3, characterized in that: A guide rail clamp is installed on the sliding block.
5. The low strain detector for pile foundation according to claim 1, characterized in that: Handles are fixedly mounted on both sides of the base.