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Method for continuously monitoring side wall deformation in tunnel invert excavation process

A technology for side walls and tunnels, applied in measuring devices, surveying and navigation, height/horizontal measurement, etc., can solve problems such as lack of continuous and reliable monitoring of side walls, and achieve accurate guidance for on-site construction, simple and easy installation, and accurate forecasting Effect

Inactive Publication Date: 2019-12-20
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for continuously monitoring the deformation of the side wall during the excavation of the inverted arch of the tunnel, so as to solve the problem of lack of continuous and reliable monitoring of the deformation of the side wall during the excavation of the inverted arch of the existing tunnel

Method used

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  • Method for continuously monitoring side wall deformation in tunnel invert excavation process
  • Method for continuously monitoring side wall deformation in tunnel invert excavation process
  • Method for continuously monitoring side wall deformation in tunnel invert excavation process

Examples

Experimental program
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Embodiment

[0037] 1. Install the infrared generator 1 and the infrared receiver 2 respectively on the two side walls of the inverted arch section that has been constructed, and on the two side walls of the inverted arch excavation section near the end of the tunnel face 4; the height distance The top of the short side wall is about 1.3m (it is advisable not to damage the waterproof board). When installing, ensure that the infrared generator 1 and the infrared receiver 2 are firm and not loose. The distance between the infrared generator 1 and the infrared receiver 2 is 8m.

[0038] 2. The production of infrared rays through the ring 3: before the excavation of the inverted arch, use The steel bar 33 is processed with infrared rays passing through the ring 3, one end of the steel bar 33 is welded with 8# steel wire 32, the other end of the steel wire 32 is welded with a 4×4cm steel plate 31, the thickness of the steel plate 31 is not less than 2mm, and an infrared ray with a diameter of ...

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Abstract

The invention discloses a method for continuously monitoring side wall deformation in a tunnel invert excavation process. The method solves the problem that the side wall deformation is lack of continuous and reliable monitoring in the existing tunnel invert excavation process. The method comprises the steps of: fixedly installing an infrared ray generator on each of two side walls of a constructed invert section; fixedly installing an infrared ray receiver on each of two side walls, close to one end of a tunnel face, of an invert excavation section; installing a plurality of infrared ray penetrating rings on two side walls of an invert construction section; adjusting positions and angles of the infrared ray penetrating rings, so that infrared rays emitted by the infrared ray generators penetrate through each infrared ray penetrating ring on the same side and then reach the infrared ray receivers on the same side; and carrying out invert excavation, giving an alarm by means of each infrared ray receiver when the infrared ray receiver does not receive infrared ray signals emitted from the infrared ray generator on the same side, and determining that the side wall on the same side has deformed.

Description

【Technical field】 [0001] The invention belongs to the technical field of tunnels, and in particular relates to a method for continuously monitoring the deformation of side walls during tunnel invert excavation. 【Background technique】 [0002] Due to the unpredictability of geological conditions in tunnel construction, collapses often occur on the face of the tunnel, or even when the door is closed. Especially in the inverted arch construction process, there are many door-closing and landslides, which are the most harmful. In the past, the preventive measures were to control the construction process, shorten the excavation footage, and adopt the traditional continuous monitoring measurement of side walls and continuous measurement of vault sinking as preventive measures. The continuous monitoring and measurement of the side walls and the continuous measurement of the vault sinking not only affect the construction, but also require on-site tracking by technicians, which is ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16G01C5/00
CPCG01B11/16G01C5/00
Inventor 翟康博尹龙高广义罗占夫王卓曹贵才谷晴天徐伟李江涛林震
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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