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Method for detecting elastic wave velocity of tunnel surrounding rock body

A detection method, elastic wave technology, applied in the direction of measuring propagation velocity, measuring device, geophysical measurement, etc., can solve the problems affecting the accurate division of rock mass grades of tunnel surrounding rock, lack of physical and mechanical data of surrounding rock mass, results and actual conditions errors and other issues, to achieve the effect of safety guarantee, accurate level and high precision

Inactive Publication Date: 2012-05-02
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

[0003] At present, when conducting field surveys on the surrounding rock of the tunnel, geological surveying and drilling are mainly used to determine the basic factors such as lithology, structure, integrity and stability of the surrounding rock of the tunnel, and the application will be subject to the specific exploration personnel Influenced by the limitations of experience and field survey conditions, and the lack of quantitative indicators such as physical and mechanical data of surrounding rock mass, there is a certain error between the results of exploration and the actual situation, which in turn affects the grade of surrounding rock mass in the tunnel. accurate division of

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  • Method for detecting elastic wave velocity of tunnel surrounding rock body
  • Method for detecting elastic wave velocity of tunnel surrounding rock body
  • Method for detecting elastic wave velocity of tunnel surrounding rock body

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Embodiment Construction

[0016] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

[0017] refer to Figure 1-2 , the method for detecting the elastic wave velocity of the tunnel surrounding rock mass in this embodiment includes the following steps:

[0018] Step S1, setting a survey line on the mountain body of the survey tunnel, and arranging 24 geophones in each arrangement on the survey line;

[0019] Step S2, arrange the third shot point O3 next to the first geophone, arrange the fourth shot point O4 next to the 24th geophone, arrange the first shot point O1 on the left side of the third shot point O3, and arrange the fourth shot point O1 on the left side of the third shot point O3. The second shot point is arranged on the right side of the shot point O4, and the first shot point O1 and the second shot point O2 are respectively on the extension line of the survey line where the third shot point O3 ...

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Abstract

The invention discloses a method for detecting the elastic wave velocity of a tunnel surrounding rock body. The method comprises the following steps of: obtaining the elastic wave time distance curves of a first shot point, a second shot point, a third shot point and a fourth shot point via a detector; obtaining a first difference through calculating the time difference between the parallel sections of the elastic wave time distance curves of the first shot point and the third shot point, and obtaining a second difference through calculating the time difference between the parallel sections of the elastic wave time distance curves of the second shot point and the fourth shot point; calculating the interchange time according to the formula; and calculating the difference time according to the elastic wave time distance curves of the first shot point and the second shot point and the interchange time, generating a difference time distance curve and obtaining the elastic wave velocity according to the slope of the difference time distance curve. The method disclosed by the invention can accurately detect the elastic wave velocity of the surrounding rock body of a tunnel to be surveyed, accordingly, the classified surrounding rock ranks are more accurate, and further, the tunnel construction safety is improved, and the tunnel construction investment is saved.

Description

technical field [0001] The invention relates to the field of tunnel engineering or underground tunnel engineering survey, in particular to a method for detecting elastic wave velocity of surrounding rock of a tunnel. Background technique [0002] Underground projects such as tunnels are increasingly used in the construction of railways, highways and water conservancy projects. During the investigation of underground engineering such as tunnels, the surrounding rock of the tunnel should be investigated. [0003] At present, when conducting field surveys on the surrounding rock of the tunnel, geological surveying and drilling are mainly used to determine the basic factors such as lithology, structure, integrity and stability of the surrounding rock of the tunnel, and the application will be subject to the specific exploration personnel Influenced by the limitations of experience and field survey conditions, and the lack of quantitative indicators such as physical and mechanic...

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Application Information

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IPC IPC(8): G01H5/00G01V1/00
Inventor 周柏林张践刘铁曹哲明朱正国林昀王词李凯
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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