Middle-guide-free multi-arch tunnel construction monitoring system and design method

Abstract

The invention relates to the technical field of tunnel construction, discloses a construction monitoring system for a non-middle-guide multi-arch tunnel and a design method, and aims to solve the problem that an existing monitoring system does not optimize the structural asymmetry and construction disturbance superimposed effect of the non-middle-guide multi-arch tunnel. The system comprises a data acquisition module, a data transmission module, a data processing module, an early warning module, a visualization module, a control maintenance module and the like, and is arranged at key stress parts of the tunnel to realize multi-parameter real-time monitoring. According to the design method, contents in three aspects of a monitoring project system, a monitoring reference and a monitoring range are defined, and key monitoring projects such as wall surface pressure stress in a lining of a preceding hole and settlement of a maintenance path and key contents such as the monitoring reference of the key monitoring projects and a disturbance range of excavation of a following hole to the preceding hole are covered. By setting the pressure stress and the settlement control threshold value, the monitoring point distribution range is optimized, the stable state of surrounding rock and the reliability degree of a supporting structure in the construction process are mastered in time, and the safety control level in the tunnel construction period is effectively improved.

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