Lifetime monitoring and early warning method of ultra-shallow buried bias tunnel structure

Abstract

The invention relates to a method for monitoring and early warning of the whole life of an ultra-shallow buried bias tunnel structure, belonging to the field of tunnel monitoring. The system includes a sensor, a monitoring center platform, data storage and an alarm; the sensor is connected to the monitoring center platform; the monitoring center platform is respectively connected to the data storage and the alarm; the limit value of the monitoring index is obtained by numerical limit analysis; Then analyze the numerical simulation results of the section of the ultra-shallow buried bias-pressure tunnel; compare the numerical values ​​of the obtained results to obtain the position and arrangement of the monitoring points at the variable-section section; draw up the tunnel according to the force distribution law of the ultra-shallow buried bias-pressure tunnel structure Structural stability evaluation standards, establishment of ultra-shallow buried bias tunnel structure monitoring and control indicators, indicators include: formation deformation monitoring indicators and ultra-shallow buried bias tunnel structure deformation and stress monitoring indicators.

Description

technical field [0001] The invention belongs to the field of tunnel monitoring and relates to a full-life monitoring and early warning method for an ultra-shallow buried bias-voltage 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 mountains during the construction process, and the entrance section of mountain tunnels is often affected by geological and other factors. Bias tunnel refers to the formation of asymmetrical loads on both sides of the tunnel structure due to terrain asymmetry or geological rock formation factors. 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...

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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