Tunnel surrounding rock scanning and observation system based on double shield tbm technology

Abstract

The invention discloses a tunnel surrounding rock scanning and observation system based on a double-shield TBM process, which includes a plurality of scanners and a host computer, and the host computer is located at the axis of the shield at the position of the auxiliary propulsion oil cylinder, and the scanner is installed on the auxiliary propulsion oil cylinder Each observation hole of the shield at the section. The invention installs the scanner at the observation hole pre-set on the back shield to realize direct measurement, collects data and processes them in a unified manner through multi-coordinate systems, and forms a monitoring-while-drilling-like logging-while-drilling observation tunnel perimeter The scanning system of rock contour and rock appearance can realize the drawing of the two-dimensional contour map of the tunnel section within a certain angle range at the top of the entire tunnel, the establishment of the three-dimensional model of the actual excavation surface of the tunnel, the imaging of the surrounding rock and rock appearance of the tunnel section, and the actual excavation surface of the tunnel. Three-dimensional petromorphic imaging, in addition, the scanner and host computer adopt modular installation, and different internal modular measurement devices can be replaced according to needs to achieve more functions.

Description

technical field [0001] The invention relates to the technical field of double-shield TBM, in particular to a tunnel surrounding rock scanning and observation system based on the double-shield TBM process. Background technique [0002] Double-shield TBM construction is essentially a non-drilling and blasting tunnel excavation technology, which is suitable for long tunnel construction in hard rock caverns with various adverse geological conditions. Double-shield TBM is a kind of TBM type, its construction feature is that the excavation and lining of the tunnel can be carried out simultaneously, and there are two modes of excavation (double shield mode and single shield mode), which are convenient for the construction of the weak geological fracture zone stratum, from the double shield tunnel boring machine From the characteristics, we can see the advantages of high excavation efficiency, good hole quality, economy, safety, and environmental protection. During the construction ...

AI Technical Summary

Problems solved by technology

[0002] Double-shield TBM construction is essentially a non-drilling and blasting tunnel excavation technology, which is suitable for long tunnel construction in hard rock caverns with various adverse geological conditions. Double-shield TBM is a kind of TBM type, its construction feature is that the excavation and lining of the tunnel can be carried out simultaneously, and there are two modes of excavation (double shield mode and single shield mode), which are convenient for the construction of the weak geological fracture zone stratum, from the double shield tunnel boring machine From the characteristics, we can see the advantages of high excavation efficiency, good hole quality, economy, safety, and environmental protection. During the construction process of the double-shield roadheader, it is necessary to analyze the profile of the tunnel surrounding rock section, but the existing technology has difficulties in dealing with the contact interface. , signal attenuation and less measurement parameters, it is impossible to observe and collect the morphology characteristics of the just-excavated surrounding rock in real time, and it also lacks the function of building a 3D model of the inner contour of the tunnel. For this reason, we propose a TBM technology based on double shields Tunnel Surrounding Rock Scanning and Observation System

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