富水砂土基坑渗水对侧墙变形和周边环境的影响

刘俊城,谭勇,宋享桦,樊冬冬,刘天任

Effects of through-wall leaking during excavation in water-rich sand on lateral wall deflections and surrounding environment

Jun-cheng LIU,Yong TAN,Xiang-hua SONG,Dong-dong FAN,Tian-ren LIU

表 4 硬化土体模型主要参数

Tab.4 Principal parameters for hardening soil constitutive model

土层编号 $ {E}_{50}^{\mathrm{r}\mathrm{e}\mathrm{f}} $/MPa $ {E}_{\mathrm{o}\mathrm{e}\mathrm{d}}^{\mathrm{r}\mathrm{e}\mathrm{f}} $/MPa $ {E}_{\mathrm{u}\mathrm{r}}^{\mathrm{r}\mathrm{e}\mathrm{f}} $/MPa pref/(kN·m−2) Rf m ψ/(°) υ Rint ② 8.5 8.5 42.4 100 0.9 0.5 0 0.30 0.65 ③-1 11.4 11.4 56.9 100 0.9 0.5 0 0.26 0.65 ③-2 13.0 13.0 64.8 100 0.9 0.5 2 0.24 0.65 ④-2 5.6 5.6 27.8 100 0.9 0.8 0 0.32 0.70 ④-2t 8.4 8.4 42.2 100 0.9 0.5 0 0.30 0.65 ⑤-1 9.7 9.7 4.8 100 0.9 0.5 0 0.25 0.65 ⑤-2 8.7 8.7 43.4 100 0.9 0.8 0 0.27 0.70 ⑤-3 13.7 13.7 68.4 100 0.9 0.5 2 0.26 0.65 ⑥ 15.4 15.4 76.9 100 0.9 0.5 5 0.23 0.65