Monitoring and optimal design method of tunnel face

Abstract

The invention provides a monitoring and optimal design method of a tunnel face aiming at soft rock or a soft soil tunnel adopting full-section excavation. The monitoring and optimal design method comprises design of the systematic monitoring content, arrangement of all monitoring instruments and the monitoring frequency, optimization of the excavation support design scheme and the like, the problem that in an existing monitoring method, the influences of the tunnel face deformation characteristic on the tunnel stability are not comprehensively considered is solved, and a direct basis is provided for optimization of a construction scheme and support parameters. The monitoring and optimal design method comprises the specific content: a pre-selected tunnel test section is excavated, in the excavation process, the glass fiber anchor rod overlapping length is gradually decreased, the excavation footage is gradually increased, the tunnel face dwell time is gradually prolonged, other excavation support parameters are unchanged, meanwhile the deformation condition of the tunnel face in the excavation process is monitored, and optimized glass fiber anchor rod overlapping length parameters,excavation footage parameters and tunnel face dwell time parameters are obtained.

Description

Technical field [0001] The invention relates to a systemic monitoring and optimization design method of an ADECO-RS construction method tunnel, which is mainly suitable for full-section excavation design and construction technology optimization in the transportation, hydropower and other industries. Background technique [0002] Under complex geological conditions, systematic monitoring is an important means to ensure the safe construction of tunnels. Through monitoring, we can grasp the characteristics of tunnel deformation and stress in time, and evaluate the rationality of construction plan and supporting parameters. Common tunnel monitoring mainly includes the convergence and deformation of the tunnel body and the monitoring of ground settlement. [0003] The Rock and Soil Controlled Deformation Analysis and Construction (ADECO-RS) construction method, also known as the "New Idea", believes that the stability of the tunnel face is of great significance to the safety of the tun...

AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at soft rock or soft soil tunnels excavated with full sections, and provides tunnel face monitoring and optimization design methods, including the design of systematic monitoring content, the arrangement of monitoring instruments and monitoring frequency, excavation support Optimization of the design scheme, etc., to solve the problem that the existing monitoring methods fail to fully consider the influence of the deformation characteristics of the tunnel face on the tunnel stability, and provide a direct basis for the optimization of the construction scheme and support parameters

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