Auxiliary device for operation of geological radar in construction of tunnel face of large-section tunnel

Abstract

The invention discloses an auxiliary device for the operation of a geological radar in the construction of a tunnel face of a large-section tunnel, and the device comprises a rigid frame, a power unit, a traction path adjustment apparatus, and a fixing apparatus. The rigid frame can be fixed on a tunnel construction trolley, and the traction path adjustment apparatus can achieve quick adjustment of position on the rigid frame, controls the movement path of the antenna of the geological radar, and guarantees the stability of the geological radar. An operator can remotely control the power unit from a safety region, so as to provide a pulling force for pulling the antenna of the geological radar to move along a preset measurement line. The device can provide more diversified modes of measurement line arrangement, improves the accuracy of advance geology forecast, guarantees the safety of the operator, and improves the work efficiency.

Description

technical field [0001] The patent of the invention relates to the technical field of geotechnical engineering, and is especially suitable for improving the application of geological radar in advanced geological prediction during the construction process of the face of large-section tunnels. Background technique [0002] With the development of tunnel technology in China, the geological conditions faced by tunnel construction are becoming more and more complex. In order to ensure the safety of construction personnel and property, advanced geological prediction technology has become a necessary work for tunnel construction in unfavorable geological areas. As a convenient and quick non-destructive short-range geophysical prospecting method, ground radar has been widely used in advanced geological prediction. Currently in the field operation, there are the following problems: [0003] 1. Geological radar operators generally use the handheld radar antenna to touch the rock mass ...

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Problems solved by technology

[0003] 1. Geological radar operators generally use the handheld radar antenna to touch the rock mass for detection. This detection method inevitably requires close contact with the tunnel face and the unsupported section of the tunnel, and the tunnel roof and palm that have not been supported in time. The subsurface may have problems such as falling blocks and collapses, especially under the disturbance of the bottom surface of the radar antenna, the safety of personnel and equipment cannot be guaranteed

[0004] 2. At present, manual lifting of the antenna is generally used in construction. In the detection of large-span tunnels, limited by the form of the trolley and the range of personnel activities, the current survey line is often arranged in a single way, which cannot cover the entire tunnel well. Especially for geological hazards such as karst caves that are extremely harmful once they protrude obliquely above the tunnel face, there is currently no particularly convenient detection method

[0005] 3. Even if a skilled person holds a heavy antenna to detect, they cannot accurately control the moving speed. At present, the time measurement method is generally used in China. If the moving distance per unit time is inconsistent, it is impossible to accurately locate the geological disaster in the survey line network. body position

However, this kind of device has a low degree of automation at first, and still requires the operator to work in front of the operator all the time when using it, which has huge potential safety hazards; secondly, the problem of controlling the moving speed of the antenna has not been effectively solved by using manual operation; thirdly, the layout of the measuring line Single, it is impossible to arrange conventional "well"-shaped measuring lines, and the angle cannot be adjusted, and it is impossible to achieve comprehensive coverage of key areas such as the oblique upper part of the tunnel face

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