考虑邻近结构阻隔影响的基坑开挖前降水引发地层变形的特性

曾超峰,王硕,袁志成,薛秀丽

Characteristics of ground deformation induced by pre-excavation dewatering considering blocking effect of adjacent structure

Chao-feng ZENG,Shuo WANG,Zhi-cheng YUAN,Xiu-li XUE

表 2 数值模型中土层分布及物理力学参数

Tab.2 Soil distribution and parameters used in model

土性 H /m KH /（m∙d−1） KV /（m∙d−1） M κ λ 粉质黏土 5.5 0.1 0.1 0.979 0.0065 0.0553 黏质粉土 11.0 0.5 0.5 1.192 0.0036 0.0312 粉质黏土 19.0 5.0×10−4 1.0×10−4 0.979 0.0052 0.0445 砂质粉土 24.0 1.0 1.0 1.202 0.0034 0.0293 黏土 27.0 5.0×10−5 1.0×10−5 0.800 0.0046 0.0397 砂质粉土 33.0 1.0 0.7 1.202 0.0033 0.0283 粉质黏土 37.0 5.0×10−4 3.0×10−4 0.900 0.0037 0.0320 粉砂 42.0 2.5 1.5 1.382 0.0022 0.0191 粉质黏土 50.0 5.0×10−4 2.0×10−4 0.900 0.0035 0.0305