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 5 HSS模型参数和土层厚度

Tab.5 Parameters of HSS model and soil layer thickness

土层 $\Delta{d} $/m ψ/(°) K0 $ E_{{\text{oed}}}^{{\text{ref}}} $/MPa $ E_{{\text{50}}}^{{\text{ref}}} $/MPa $ E_{{\text{ur}}}^{{\text{ref}}} $/MPa $ G_{\text{0}}^{{\text{ref}}} $/MPa γ0.7/10−4 m Rf ①2填土 2.50 0 0.65 3.57 3.57 21.40 87.48 3.82 0.872 0.9 ④1粉质黏土 3.50 0 0.65 5.22 5.22 31.32 93.32 3.82 0.872 0.9 ⑥3砂质粉土 3.03 6.8 0.60 9.48 9.48 56.90 117.58 3.82 0.917 0.9 ⑥4粉质黏土 5.62 0 0.66 4.79 4.79 28.71 91.12 4.10 0.872 0.9 ⑦粉质黏土 1.50 0 0.57 4.70 4.70 28.19 94.60 4.10 0.872 0.9 ⑧1粉质黏土 2.85 0 0.56 4.61 4.61 27.67 94.56 4.10 0.872 0.9 ⑧2砂质粉土 1.58 4.3 0.50 10.79 10.79 64.73 133.41 4.10 0.917 0.9 ⑨1粉质黏土 6.52 0 0.53 4.96 4.96 29.75 93.86 4.95 0.872 0.9 ⑨2粉砂 2.65 4.1 0.48 13.45 13.45 80.69 126.27 4.95 0.997 0.9 ⑩1粉质黏土 1.75 0 0.53 5.66 5.66 33.93 99.64 4.89 0.872 0.9 ⑪1粉质黏土 9.00 0 0.52 5.92 5.92 35.50 99.22 4.89 0.872 0.9 ⑪2粉砂 2.45 4.1 0.44 13.94 13.94 83.64 127.35 5.24 0.997 0.9 ⑪3粉质黏土 4.30 0 0.52 5.92 5.92 35.50 96.25 5.24 0.872 0.9 ⑪4粉砂 2.20 6.1 0.43 11.15 11.15 66.91 125.86 5.24 0.997 0.9 ⑪5粉质黏土 2.90 0 0.50 5.83 5.83 34.97 95.21 5.29 0.872 0.9 ⑫1粉质黏土 7.90 0 0.53 6.26 6.26 37.58 99.40 5.29 0.872 0.9 ⑬1粉质黏土 12.35 0 0.52 6.61 6.61 39.67 99.40 5.12 0.872 0.9 ⑬2粉砂 6.20 3.0 0.43 10.82 10.82 64.94 122.49 5.71 0.997 0.9 ⑬3粉质黏土 2.70 0 0.56 6.26 6.26 37.58 97.81 5.71 0.872 0.9 ⑭1粉质黏土 4.15 0 0.55 6.44 6.44 38.63 96.17 5.71 0.872 0.9 ⑭2粉砂 24.35 3.0 0.44 12.05 12.05 72.32 123.06 5.71 0.997 0.9