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针对隧道围岩的非连续特性,结合李家营隧道工程实例,在现场岩体结构面调查和体表信息采集的基础上,利用自行开发的GeoSMA-3D程序建立了该隧道三维数值模型,搜索隧道开挖诱发的关键块体。将所建立的空间模型导入非连续变形分析方法 DDA,并进行开挖过程的计算分析,模拟了该隧道在无工程措施情况下围岩坍塌破坏全过程,为工程施工和关键地段及时处理提供借鉴。
According to the discontinuity of tunnel surrounding rock and the engineering example of Lijiaying tunnel, based on the investigation of on-site rock mass structure surface and the collection of body surface information, a three-dimensional numerical model of the tunnel was established by using GeoSMA-3D program developed by ourselves. Digging evoked key blocks. The spatial model was imported into the discontinuous deformation analysis (DDA) method and the excavation process was calculated and analyzed. The whole process of surrounding rock collapse and collapse in the absence of engineering measures was simulated to provide reference for the construction and timely treatment of key sections .