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 1 场址土层物理力学参数

Tab.1 Physical and mechanical parameters of soil layers at site

土层编号 土层名称 w/% γ/(kN·m−3) e Es0.1~0.2/MPa c/kPa φ/(°) KH/(cm·s−1) KV/(cm·s−1) ② 砂质粉土 30.7 18.4 0.870 8.49 7.7 22.0 2.64×10−5 5.22×10−5 ③-1 砂质粉土夹粉砂 30.2 18.4 0.867 11.38 4.5 27.5 1.81×10−3 3.94×10−3 ③-2 粉砂 29.0 18.6 0.832 12.96 4.6 32.0 1.27×10−3 4.39×10−3 ④-2 粉质黏土夹粉土 33.6 18.1 0.968 5.57 11.0 18.5 4.19×10−6 2.78×10−5 ④-2t 砂质粉土夹粉质黏土 31.2 18.3 0.898 8.43 6.3 21.0 2.13×10−4 9.79×10−4 ⑤-1 粉砂夹粉土 30.0 18.4 0.874 9.67 5.2 30.0 4.83×10−4 2.35×10−3 ⑤-2 砂质粉土夹粉质黏土 30.6 18.3 0.893 8.69 6.6 27.0 4.60×10−4 1.75×10−3 ⑤-3 粉砂夹粉土 29.9 18.5 0.855 13.69 4.9 32.0 1.69×10−3 3.39×10−3 ⑥ 粉砂 28.0 18.7 0.809 15.38 2.9 35.0 3.22×10−3 6.64×10−3