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A pile foundation detection device and method

A detection method and detection device technology, applied in the direction of measuring devices, measuring electrical variables, infrastructure engineering, etc., can solve the problems of inflexible construction, easy to be interfered by other factors, and affect detection accuracy, etc., to achieve good guidance function, not Occupies construction time and has good application prospects

Active Publication Date: 2021-02-09
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors found that the existing geophysical methods for detecting pile foundations are inflexible in construction and are easily disturbed by other factors, which in turn affects the detection accuracy.

Method used

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  • A pile foundation detection device and method
  • A pile foundation detection device and method
  • A pile foundation detection device and method

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0074] As an implementation manner, the pile foundation detection method also includes:

[0075] While drilling the launch hole, images of the rock-soil interface at different depths are collected to identify the interface, and the corresponding position between the rock-soil interface and the resistivity of the pile foundation is determined through the difference in resistivity of the geoelectric body itself.

[0076] As an implementation, the formula for inverting the resistivity data using the least square method is:

[0077]

[0078] in, is the resistivity model vector, is the observed resistivity between observation points a and b, ρ a (ρ κ ) The synthetic resistivity of observation point a, W m and W d is the weighting matrix and data set of model shape parameters, is the Jacobian matrix of the observed data about the model shape parameters; S k is the step size scaling factor.

[0079] unit operator W d =I is set as the weighting matrix of the data, and t...

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Abstract

The disclosure provides a pile foundation detection device and method. Wherein, the pile foundation detection device includes a transmitting electrode, which is arranged in the transmitting hole, and the transmitting hole is parallel and arranged at a preset distance from the pile foundation. The depth of the transmitting hole is greater than or equal to the length of the foundation pile, and the length of the transmitting electrode is greater than or equal to Equal to the length of the foundation pile; the receiving electrode is semicircularly arranged on the ground and surrounds the pile foundation; the transmitting electrode and the receiving electrode are connected to CT equipment, and the CT equipment is used to obtain the resistance of the pile foundation The resistivity data were inverted and imaged using the least square method to form a three-dimensional slice of pile foundation resistivity.

Description

technical field [0001] The disclosure belongs to the field of pile foundation detection, and in particular relates to a pile foundation detection device and method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] According to the "Technical Specifications for Building Pile Foundation Inspection" (JGJ106-2014), the main methods of pile foundation inspection include static load test, core drilling method, low strain method, high strain method, and acoustic transmission method. The inventors have found that the existing geophysical methods for detecting pile foundations have the problems of inflexible construction and being easily interfered by other factors, thereby affecting the detection accuracy. Contents of the invention [0004] In order to solve the above problems, the present disclosure provides a pile foundation detection device ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00G01N27/04G01R27/08
CPCE02D33/00E02D2200/17G01N27/041G01R27/08
Inventor 苏茂鑫刘轶民薛翊国曲传奇张开
Owner SHANDONG UNIV
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