【作者】 黄俊杰； 孟海； 张华栋； 吕腾； 张怀静；

【Author】 Huang Junjie;Meng Hai;Zhang Huadong;Lv Teng;Zhang Huaijing;Central Research Institute of Building and Construction;Beijing Institute of Civil Engineering and Architecture;

【机构】 中冶建筑研究总院有限公司； 北京建筑工程学院；

【摘要】 基于隧道开挖之后围岩处于应力调整状态及围岩变形这一实际情况出发,建立初期支护最优设置时段的概念,选取典型断面进行数值模拟分析,分别模拟不同围岩荷载释放系数的工况下隧道变形及支护结构的受力状态,并结合该隧道监测数据,合理确定出围岩荷载释放为40%的时候,为隧道最佳设置初期支护的时段。更多还原

【Abstract】 Based on the tunnel excavation in surrounding rock after stress adjustment state of surrounding rock deformation and the actual conditions,we would established the concept of initial support time.Selecting typical section for numerical simulation analysis and combined with the tunnel monitoring data,by different surrounding rock load release coefficient were simulated of tunnel under the condition of deformation and stress state of retaining structure.It is concluded that for li Jia Bao tunnel when the Surrounding rock load release coefficient is 40% is the best setting Initial support time.更多还原