Construction method and device for precise positioning and fixing of tunnel arch frame

Abstract

The invention discloses a construction method and device for tunnel arching accurate positioning and fixing. The method comprises the following steps that the center line of a tunnel is measured, and according to the position of the center line, an arching operation trolley and a laser distance measuring instrument are distributed; through the laser distance measuring instrument, the preset arching position and surrounding rock key points are determined, and the surrounding rock key points comprise the set positions located at the arch foot and the arch top, and drill holes are stricken in the key points; an arching is mounted to the arching position, steel plates with via holes are arranged on the arching, and the via holes correspond to the drill holes; and an anchorage material is mounted in the drill holes, and threaded steel bars are inserted into the drill holes through the via holes to enable the anchorage material to anchor the threaded steel bars.

Description

technical field [0001] The present disclosure generally relates to the field of tunnel engineering support, and in particular relates to a construction method and device for precise positioning and fixing of a tunnel arch. Background technique [0002] With the continuous development of tunnel engineering construction in my country, the span and length of tunnels are getting larger and larger. During the construction process, a series of complex conditions such as high ground stress, soft rock, fault fracture zone, bias pressure, and water spray are often encountered. The quality and progress of the tunnel construction process put forward higher requirements. At present, the commonly used tunnel support forms include section steel support, anchor shotcrete support, and masonry support, etc., but under the traditional construction technology, the section steel support commonly used in tunnel engineering has inaccurate positioning and different spacing. and other problems, the...

AI Technical Summary

Problems solved by technology

At present, the commonly used tunnel support forms include section steel support, anchor shotcrete support, and masonry support, etc., but under the traditional construction technology, the section steel support commonly used in tunnel engineering has inaccurate positioning and different spacing. and other problems, the above problems make the arch prone to instability and overturning and the risk of uneven stress under the load of surrounding rock, which leads to the overall bearing capacity of the arch not meeting the design requirements, and the deformation of the surrounding rock cannot be well controlled. In severe cases, it may even cause a series of major disasters such as face instability and tunnel collapse, causing heavy casualties and economic losses

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