Tunnel construction monitoring measurement and back break measurement control technology

Abstract

The invention discloses a tunnel construction monitoring measurement and back break measurement control technology. The control technology comprises the following steps of (1), performing tunnel excavation construction, scanning a tunnel excavation section, obtaining three-dimensional point cloud data, and performing data processing; (2), obtaining an actual three-dimensional model of the excavated tunnel, and synthesizing a theoretically designed tunnel model and the actual three-dimensional model to represent back break measurement information of the tunnel; (3), effectively controlling over-break and under-break conditions of the tunnel; (4), formulating a tunnel construction monitoring and measuring scheme, and carrying out primary support on the tunnel; (5), processing and analyzing data, and determining the construction time of an inverted arch and a secondary lining of the excavated tunnel, and determining the deformation grade condition of the tunnel; and (6), establishing a construction control standard of the excavated tunnel, and guaranteeing that tunnel construction is completed. The control technology can meet the precision requirement of back break measurement, is higher in efficiency than a traditional detection mode, and can be applied to safety monitoring of various tunnel projects.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering measurement, in particular to a tunnel construction monitoring measurement and over-under-excavation measurement control technology. Background technique [0002] During the tunnel construction and operation phases, tunnel deformation monitoring and measurement play an important role. On the one hand, tunnel deformation monitoring and measurement is an important part of tunnel information construction, and it is an important means to feed back the dynamic change trend of surrounding rock and structure, optimize support parameters, and ensure construction safety. On the other hand, tunnel deformation monitoring and measurement is also an important part of tunnel health monitoring. It plays an important role in evaluating the safety status of tunnel structures in real time, implementing safety warnings in a timely manner, and maximizing the service life of tunnels. The main shortcomings ...

AI Technical Summary

Problems solved by technology

Over- and under-excavation will cause many hazards to construction, such as: the increase of excavation and support costs, the inability of waterproof materials to match the rock surface, local stress concentration of surrounding rock, etc.

[0004] Tunnel over- and under-excavation control is an important part of tunnel construction monitoring and measurement. If over-excavation seriously increases the excavation area, the stability of the tunnel face will decrease, which will easily lead to tunnel instability, while under-excavation will increase the thickness of the tunnel lining. Failure to meet the design requirements, leaving quality and safety hazards

Therefore, the control of tunnel excavation is also an important measure to ensure the safety of tunnel construction and the quality of tunnel construction; the traditional over- and under-excavation measurement of tunnel sections has the following disadvantages: 1) The operation is complicated, time-consuming and labor-intensive, and human factors affect the measurement accuracy 2) The environment is complex, there are many adverse factors, and the reliability and sensitivity of the measurement are not high; 3) The measurement points are limited, and it is difficult to accurately reflect the deformation state of the entire section