Comprehensive stereoscopic detection method for shallow karst tunnel geology

A three-dimensional detection and tunnel technology, which is applied in geophysical survey, electromagnetic wave detection, seismology and other directions to achieve the effect of reducing collapse accidents, controlling tunnel deformation, and achieving high reliability of results.

Active Publication Date: 2019-04-12
CCCC THIRD HARBOR ENG
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Problems solved by technology

[0004] In view of the problems existing in the geological detection of shallow karst tunnels by exi

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  • Comprehensive stereoscopic detection method for shallow karst tunnel geology
  • Comprehensive stereoscopic detection method for shallow karst tunnel geology
  • Comprehensive stereoscopic detection method for shallow karst tunnel geology

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[0027] In order to make it easy to understand the technical means, creative features, objectives and effects achieved by the present invention, the present invention will be further explained below in conjunction with specific drawings.

[0028] Ground Penetrating Radar is a geophysical method that uses high-frequency pulsed electromagnetic waves to determine the distribution of matter inside the medium. It is valued and widely used because of its simple operation, high resolution, intuitive images, good shielding effect, and low construction interference. . The seismic wave method is a method of artificial seismic exploration using seismic reflection waves. The seismic wave is used to propagate in the medium to determine the geological conditions of the tunnel overlying stratum. The ground operation is highly controllable and does not affect the construction progress.

[0029] Based on this, this example is based on the characteristics of shallow karsts and uses the combination of...

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Abstract

The invention discloses a comprehensive stereoscopic detection method for shallow karst tunnel geology. The comprehensive stereoscopic detection method comprises the steps that 1, geological conditions are exposed and the working surface of a tunnel is sketched and recorded according to a tunneling surface; 2, geological radar detecting lines and detecting points are arranged in front of the working surface of the tunnel according to the geological conditions of the working surface of the tunnel; 3, a geological radar is used for detecting the geological conditions at different depths of the working surface of the tunnel, then images are judged and interpreted, and whether poor geology development occurred in front of the working surface of the tunnel or not is inferred according to detection information; and 4, a three-dimensional detection is conducted by using a seismic wave method on the ground to precast the geological conditions in front of the working surface of the tunnel and overlying strata. According to the detection scheme for the shallow karst tunnel geology, the geological radar and the seismic wave method are used for a comprehensive stereoscopic detection of the shallow karst tunnel construction geology, accurate forecast of stereoscopic form of the shallow karst is achieved, the influence on construction is relatively small, and the construction progress is unhindered.

Description

Technical field [0001] The invention relates to a forecasting and forecasting scheme for karst and karst caves in tunnel engineering, in particular to a comprehensive three-dimensional karst geological forecasting and forecasting scheme for shallow karst tunnel construction. Background technique [0002] Shallow karst generally refers to a karst tunnel with a shallow buried depth (tens of meters, generally no more than 100m). After a lot of engineering practice, it has the following engineering characteristics: the tunnel is located in the vertical circulation zone of karst, and is generally relatively developed and exists with the ground. Direct hydraulic connection; karst caves develop irregularly, filled with mud, sand, and water; construction treatment is difficult, the construction period is long, and it is easy to collapse to the surface during construction treatment. At present, the detection methods used in advance prediction of karst tunnels are: TSP (series), land sonar...

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Application Information

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IPC IPC(8): G01V3/12G01C17/00G01V1/30G01V1/24
CPCG01C17/00G01V1/24G01V1/307G01V3/12
Inventor 王彬彬李淮刘卫星
Owner CCCC THIRD HARBOR ENG
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