小净距隧道浅埋段围岩监测分析

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为了研究隧道浅埋段岩体位移与应力动态过程，针对小净距隧道浅埋段的工程特点，对某隧道的岩体位移、支护压力进行了监测，在分析了监测结果的基础上，采用数值模拟技术，对小狰距隧道浅埋段围岩动态过程进行了仿真分析。其研究结果表明：小净距隧道浅埋段中夹岩柱岩体总是向开挖侧洞室发生形变且同一断面双线间支护压力区别较大，先行洞支护压力较后行洞高。 In order to study the displacement and stress dynamic process of shallow-buried section of tunnel rock, we monitor the tunnel rock displacement and the supporting pressure for the engineering characteristics of tunnel shallow section with small net span. Based on the analysis of the monitoring results of the foundation, the simulation and analysis of dynamic process for the tunnel shallow section with small net span are carried out with numerical simulation technology. The research results show that the small spacing tunnel shallow buried section of middle rock wall rock tunnel excavation is always to lateral deformation and has the same cross section between a larger difference between double support pressure, first hole after hole support pressure is high.