Adjustable tunnel support positioning and primary support inner contour line monitoring device

Abstract

The invention discloses an adjustable tunnel support positioning and primary support inner contour line monitoring device. The adjustable tunnel support positioning and primary support inner contour line monitoring device comprises a fixing device and an infrared emitting device, wherein the fixing device comprises a fixing support, a sliding piece and a first fixing piece, the fixing support is arranged along the inner wall of a primary support arch frame, a sliding groove is formed in the fixing support, the sliding piece is arranged in the sliding groove, and the first fixing piece is arranged on the sliding piece; the infrared emitting device is arranged on the first fixing piece. According to the adjustable tunnel support positioning and primary support inner contour line monitoring device, the problems that measurement points need to be marked during tunnel excavation and are lost after excavation is solved, tunnel excavation and primary support stand operation are guided, operation time is saved, measurement and construction efficiency is improved, manpower resources are saved, whether serious over-excavation or under-excavation exists in completed primary support sprayed concrete or not can be monitored, and potential quality hazards are reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an adjustable tunnel support positioning and initial support inner contour monitoring device. Background technique [0002] Tunnel construction is carried out in a relatively closed space, which requires extremely high measurement technology, and the cross-section needs to be measured before and after excavation and when the arch is installed. At present, tunnel surveys use surveyors equipped with total stations to stake out, which is highly professional; after the tunnel face is excavated (by blasting or mechanical excavation), the marked measurement points are lost, and the initial support stand needs to be staked out again, which takes a long time to measure , affecting the construction progress; when re-testing the initial support section, the surveyors use the point survey method, which takes a long time to measure, and it is easy to miss some over- and under-exc...

AI Technical Summary

Problems solved by technology

At present, tunnel surveys use surveyors equipped with total stations to stake out, which is highly professional; after the tunnel face is excavated (by blasting or mechanical excavation), the marked measurement points are lost, and the initial support stand needs to be staked out again, which takes a long time to measure , affecting the construction progress; when re-testing the initial support section, the surveyors use the point survey method, which takes a long time to measure, and it is easy to miss some over- and under-excavation points, and there are quality hidden dangers such as under-excavation or voiding of the lining in the later stage

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