Multi-testing-point low-strain detection method for integrity of foundation pile
A detection method and a low-strain technology, which can be applied in basic structure tests, basic structure engineering, construction, etc., can solve problems such as inaccurate judgments, and achieve the effects of overcoming detection blind spots, achieving accuracy, and overcoming inaccurate judgments of defects
Inactive Publication Date: 2020-03-27
安徽省七星工程测试有限公司
View PDF4 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When there are three acoustic tubes, the center point of the foundation pile is the detection blind spot, which causes the problem of inaccurate defect judgment
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0019] A multi-measuring-point low-strain detection method for foundation pile integrity, comprising the following steps:
[0020] (1) Bury foundation piles with multiple acoustic tubes to obtain foundation piles that meet ultrasonic testing and low-strain testing;
[0021] (2) Take the center of the pile top surface of the foundation pile as the knocking point, set at least two test points around the knocking point, and install pile top sensors, and the multiple test points are located on concentric circles of different radii;
[0022] (3) Execute the knocking action, collect multiple measuring point signals from the pile top sensor, perform average processing and analysis on the multiple measuring point signal data from the pile top sensor, and conduct preliminary analysis on whether the foundation pile has defects according to the analysis results judge;
[0023] (4) Judging the integrity of the pile body: If the pile top sensor only receives the reflected wave at the bott...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a multi-testing-point low-strain detection method for integrity of a foundation pile. The method is characterized in that when knocking action is executed at testing points, average processing analysis is carried out on signal data of the plurality of testing points from a pile top sensor so that whether the foundation pile has defects or not can be judged, that is, the integrity of the foundation pile is judged and analyzed by adopting a low-strain dynamic testing method; and when it is judged that a pile body is incomplete, the internal defects of the foundation pileare subjected to qualitative analysis by adopting an ultrasonic detection method to obtain the scale, properties and the like of the defects of the foundation pile. According to the method, the low-strain dynamic testing method and the ultrasonic detection method are combined, the plurality of testing points located on concentric circles with different radiuses are arranged, the problem that the defect of the pile bottom is not accurately judged when the low-strain dynamic testing method is used for testing the long pile is solved, meanwhile, the problem of detection blind areas of the ultrasonic detection method is solved, and the integrity of the foundation pile can be judged accurately.
Description
technical field [0001] The invention relates to the technical field of foundation pile detection, in particular to a multi-measuring-point low-strain detection method for the integrity of foundation piles. Background technique [0002] Low-strain dynamic measurement method: The low-strain dynamic measurement method uses a small hammer to hit the pile top, receives the stress wave signal from the pile through the sensor bonded to the pile top, and uses the stress wave theory to study the dynamic response of the pile-soil system. Inversion analysis of the measured velocity signal and frequency signal to obtain the integrity of the pile. This method is simple and fast, but how to obtain a good waveform and how to analyze the integrity of the pile is the key to the detection work. The test process is the key to obtain a good signal. During the test, attention should be paid to: ①Selection of test points. The number of test points varies depending on the diameter of the pile an...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): E02D33/00
CPCE02D33/00E02D2600/10
Inventor 王文奎俞发乾郝建东黄春阳高力戚良军
Owner 安徽省七星工程测试有限公司