Pile foundation integrality detection method

A detection method and integrity technology, applied in the field of detection, can solve the problems of single equipment, heavy equipment, insufficient detailed and accurate detection, etc., and achieve the effect of sensitive detection

Inactive Publication Date: 2015-01-07
SHANTOU UNIV
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Problems solved by technology

[0003] At present, the equipment for testing the integrity of the pile foundation is relatively simple, th

Method used

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Embodiment Construction

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below.

[0017] A method for detecting the integrity of a pile foundation according to an embodiment of the present invention is to install a sensor connected to the reflected signal in the pile foundation. The sensors used include two types of speed type and acceleration type. Different, the frequency band of accelerometer, high-frequency characteristic is better; The frequency band of speedometer is narrow, but low-frequency characteristic is better, the embodiment of the present invention has adopted two kinds of sensors to be used together, and short pile, small-diameter pile detection adopts accelerometer , to discover shallow defects and reduce shallow "blind areas"; large diameter and long piles are detected using speedometers to obtain deep defects and good pile bottom reflection signals.

[0018] According t...

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Abstract

The embodiment of the invention discloses a pile foundation integrality detection method. The method includes the following steps that according to the size of a pile diameter, two to four detection sensors are symmetrically arranged on a pile center; a pile head is cleaned, and waveforms are generated in a pile through a shock excitation device; at least three effective signals are recorded by each detection sensor, and the waveform recurrence and the pile bottom reflection of the effective signals have no obvious abnormity; the concrete structure of a pile body is judged by judging the defect type parameter F. By means of the pile foundation integrality detection method, by collecting changes of wave impedance and reflecting the positions of pile bottom reflected waves on the time domain or the frequency domain, the pile body wave velocity is worked out, integrality evaluation is conducted on the pile body, the defective degree and position of the pile body are determined, and the pile foundation integrality detection method has the advantages of being sensitive in detection and integral.

Description

technical field [0001] The invention relates to a detection method, in particular to a detection method for pile foundation integrity. Background technique [0002] The pile foundation is a concealed underground object. The pile foundation supports the buildings and structures on the ground. It is the foundation of the building. Once the foundation is unstable, it will inevitably cause the destruction of the whole building. Therefore, the design, construction and inspection of the pile foundation are the prerequisites for the safety and reliability of the pile foundation. [0003] At present, the equipment for testing the integrity of the pile foundation is relatively simple, the detection is not detailed and accurate enough, and there are also problems such as relatively heavy equipment. Therefore, we urgently need to track and test the process of surrounding buildings and structures, or use advanced equipment and instruments to scientifically record the process of pile fo...

Claims

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Application Information

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IPC IPC(8): E02D33/00
CPCE02D33/00E02D2600/10
Inventor 杨艳春闫敬文赵晓华丁研研蒋晓飞
Owner SHANTOU UNIV
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