基于门式抗浮框架的基坑开挖下卧隧道变形控制

吴怀娜, 冯东林, 刘源, 蓝淦洲, 陈仁朋

Anti-Uplift Portal Frame in Control of Underlying Tunnel Deformation Induced by Foundation Pit Excavation

WU Huaina, FENG Donglin, LIU Yuan, LAN Ganzhou, CHEN Renpeng

表1 主要土层物理参数

Tab.1 Physico-mechanical parameters of soil layers

土层 γ/(kN·m-3) e0 Es/MPa w/% kv/(m·d-1) c/kPa φ/(°) 素填土①1 17.5 1.89 1.88 67.5 0.2 10 16 填砂①2 19 - - 13.1 10 0 25 粗砂⑤2 20 - 2.66 13.5 10 0 30 砾质黏性土⑧ 17.7 1 9 33.3 0.08 23 23.5 全风化花岗岩⑨1 19.5 0.87 13 27.6 0.1 30 27.5