A comprehensive three-dimensional detection method for shallow karst tunnel geology

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 tunnel engineering karst and karst cave prediction scheme, in particular to a comprehensive three-dimensional karst geological prediction scheme for shallow karst tunnel construction. Background technique

[0002] Shallow karst generally refers to karst tunnels with shallow burial depth (tens of meters, generally no more than 100m). After a large number of engineering practices, it has the following engineering characteristics: the tunnel is located in the vertical circulation zone of karst, generally relatively developed, and exists with the ground. There is a direct hydraulic connection; the karst caves develop irregularly and are filled with mud, sand, and water; the construction process is difficult and the construction period is long, and it is easy to collapse to the surface during construction process. At present, the detection methods used in the advanced prediction of karst tunnels include: TSP (series), land sonar, ...

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