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 2 天津地区不同深度粉质黏土剪切模量随剪应变衰减规律统计[28]

Tab.2 Statistics of shear modulus degradation with shear strain under different depths for silty clays in Tianjin area[28]

深度/m G/G0 γ = 5×10−6 γ = 1×10−5 γ = 5×10−5 γ = 1×10−4 γ = 5×10−4 γ = 1×10−3 γ = 5×10−3 γ = 1×10−2 0~10 0.994 36 0.988 83 0.947 08 0.900 61 0.657 72 0.498 83 0.176 72 0.098 81 10~20 0.994 72 0.989 52 0.950 20 0.906 09 0.671 60 0.515 20 0.189 05 0.107 48 20~30 0.995 53 0.991 11 0.957 47 0.919 17 0.706 18 0.556 14 0.223 61 0.133 55 30~40 0.995 70 0.991 43 0.958 95 0.921 69 0.710 53 0.558 13 0.212 26 0.120 62 40~50 0.995 86 0.991 78 0.960 49 0.924 59 0.719 77 0.571 45 0.229 15 0.135 33 50~60 0.996 04 0.992 12 0.961 96 0.927 13 0.724 89 0.575 05 0.226 63 0.131 77 60~70 0.995 79 0.991 62 0.959 80 0.923 37 0.717 16 0.567 78 0.222 35 0.127 91 70~90 0.996 29 0.992 62 0.964 46 0.931 98 0.742 25 0.597 94 0.244 43 0.147 53 >90 0.996 45 0.992 83 0.965 84 0.934 33 0.747 29 0.604 24 0.255 32 0.154 29