天津某超深地铁基坑变形分析与小应变硬化参数取值

张中杰,周赫宸,顾晓强,陈加核,吴航

Deformation analysis and parameter determination of hardening soil model with small strain of an ultra-deep subway excavation in Tianjin

Zhongjie ZHANG,Hechen ZHOU,Xiaoqiang GU,Jiahe CHEN,Hang WU

表 1 土层主要物理力学参数

Tab.1 Physical and mechanical parameters of soils

土层 e0 γ/(kN·m−3) c'/kPa φ'/(°) Es1-2/MPa ①2填土 0.951 18.8 22.6 17.3 4.1 ④1粉质黏土 0.761 19.5 22.6 17.3 6.0 ⑥3砂质粉土 0.728 19.6 8.0 36.8 10.9 ⑥4粉质黏土 0.826 19.2 19.9 21.8 5.5 ⑦粉质黏土 0.726 19.8 16.3 24.1 5.4 ⑧1粉质黏土 0.727 19.8 21.4 23.4 5.3 ⑧2砂质粉土 0.471 21.2 14.5 34.3 12.4 ⑨1粉质黏土 0.746 19.6 17.3 27.9 5.7 ⑨2粉砂 0.624 20.2 15.2 34.1 16.4 ⑩1粉质黏土 0.607 20.4 33.8 22.6 6.5 ⑪1粉质黏土 0.616 20.3 15.8 30.4 6.8 ⑪2粉砂 0.606 20.3 12.6 34.1 17.0 ⑪3粉质黏土 0.684 20.0 40.8 23.9 6.8 ⑪4粉砂 0.631 20.1 16.8 36.1 13.6 ⑪5粉质黏土 0.710 19.8 35.5 26.3 6.7 ⑫1粉质黏土 0.612 20.3 43.4 18.3 7.2 ⑬1粉质黏土 0.612 20.4 45.4 13.9 7.6 ⑬2粉砂 0.693 19.6 14.4 33.0 13.2 ⑬3粉质黏土 0.647 20.1 27.3 16.3 7.2 ⑭1粉质黏土 0.686 20.0 44.0 20.7 7.4 ⑭2粉砂 0.682 19.6 14.4 33.0 14.7