【摘要】 泥质页岩岩性较软,易风化,具有明显的遇水崩解、失水干裂的性质,目前关于该地质条件下隧道围岩受力情况的研究并不多见。通过对关口垭隧道泥质页岩条件下软弱地段支护系统的现场测试,得到了工字钢、喷混凝土和二次衬砌等支护构件的受力状况与软弱泥质页岩地质状况之间的关系,并通过加入节理单元,进行了平面数值分析,验证了现场实测资料的正确性。这些分析为该类地质条件下的隧道合理设计提供了依据。更多还原

【Abstract】 Agrillaceous shale is soft, apt to be weathered, crumbling with water and dry cracking when losing water. Studies on the performance of tunnel lining under such kind of geological condition are rare. By means of in-situ tests and measurements of the supporting system of Guankouya tunnel in a section of argillaceous shale, the relationships are obtained between the stresses in the steel ribs, shotcrete, secondary lining and the geologic condition of soft and weak argillaceous shale. Joint elements are then used and two-dimensional numerical analysis is carried out to verify the validity of the measured data. These analyses provide a sound basis for the tunnel design under such geological condition.更多还原