城市环境下TBM施工对围岩稳定性影响的监测分析及支护参数优化

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Abstract The section from Wulidian to Shanyanggou Reservoir Station in Chongqing Transit Line 6 is the testing project，in which the tunnel boring machine(TBM) was firstly employed as a tool for the construction of urban rail transit. To investigate the stability of the surrounding rock of tunnel in construction，a large number of in-situ monitorings were conducted. Based on the monitoring data，the variation laws and distributions of the vault settlement，displacement in deep surrounding rock，axial force in bolt，internal force in steel arch and contacting stress with surrounding rock were analyzed in detail. Then，the supporting parameters optimization was accomplished using numerical simulation. The research is beneficial to fundamentally guide the follow-up construction of the tunnel and the design scheme optimization. The proposed technique has potential applications to a large range of urban construction engineerings using TBM technology.

Key words： tunnelling engineering tunnel boring machine(TBM) surrounding rock stability monitoring and analysis supporting parameters optimization

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http://www.rockmech.org/EN/Y2012/V31/I7/1325

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