Ultrashallow-embedded unsymmetrial loading tunnel full-life monitoring and prewarning method

Abstract

The invention relates to an ultrashallow-embedded unsymmetrial loading tunnel full-life monitoring and prewarning method, and belongs to the field of tunnel monitoring. A system comprises a sensor, amonitoring center platform, a data storer and an alarm; the sensor is connected with the monitoring center platform; the monitoring center platform is connected with the data storer and the alarm; limit values of monitoring indexes are obtained by adopting a numerical value limit analysis method; ultrashallow-embedded unsymmetrial loading tunnel section numerical value simulation results are analyzed; the positions and the arrangement of monitoring points on variable sections are obtained through numerical values of compared results; tunnel structure stability evaluation standards are fitted according to ultrashallow-embedded unsymmetrial loading tunnel structure stress distribution rules to build ultrashallow-embedded unsymmetrial loading tunnel structure monitoring control indexes; and the indexes comprise stratum deformation monitoring indexes and ultrashallow-embedded unsymmetrial loading tunnel structure deformation and stress monitoring indexes.

Description

Technical field [0001] The invention belongs to the field of tunnel monitoring, and relates to a monitoring and early warning method for the whole life of an ultra-shallow buried bias tunnel structure. Background technique [0002] With the large-scale construction of highways and high-speed railways, the line has to choose to cross mountains and ridges during the construction process. The entrance section of mountain tunnels is often affected by geological factors and other factors. Bias pressure tunnels are formed due to the asymmetry of terrain or geological rock formations, resulting in asymmetric loads on both sides of the tunnel structure. Biased pressure at the tunnel entrance will cause uneven stress on the tunnel structure, local stress concentration, excessive deformation, the tunnel structure may crack, or even cause a collapse accident in severe cases. The construction and operation phases of the entrance of a biased tunnel are often monitored manually. It is difficu...

AI Technical Summary

Problems solved by technology

Bias pressure at the tunnel entrance will cause uneven stress on the tunnel structure, local stress concentration, excessive deformation, cracking of the tunnel structure, and even serious collapse accidents

The construction stage and operation stage at the entrance of biased tunnels are often monitored manually. It is difficult to predict the surface settlement and development process caused by the tunnel entrance in time, resulting in impending structural damage that cannot be reinforced in time. Traditional monitoring and early warning is often single. It is impossible to systematically monitor and warn the whole life cycle of the tunnel structure

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