地下降水对周围环境的影响分析

An Analysis of the Influence of Foundation Excavation Dewatering on the Surrounding Environment

基坑工程中地下降水引起周围土体地下水位的变化和应力场的改变,致使周围土体发生不均匀沉降等严重后果。通过研究降低地下水位对周围地层移动影响机理,阐明地下降水与地面沉降两者相互影响,存在耦合效应。最后,根据比奥固结经典理论,建立较符合实际条件的地下水渗流场与应力场三维耦合数学模型。该模型较好地考虑了土体力学、土体水力学参数,真实地反映实际工程情况,故对工程实践具有参考作用。

Excavation dewatering causes the changes of the underground water level and the stress field in the surrounding soil,resulting in serious consequences such as uneven settlement of soil.The present study,through studying the mechanism of lowering underground water level on the surrounding soil movement aimed to show the coupled reaction that excavation dewatering and ground subsidence influenced each other.At last,according to Biot consolidation theory,the 3D coupling mathematical model of groundwater seepage field and stress field was established.The model could better consider the parameters of soil mechanics,soil hydraulics parameters,and reflect the actual situation in real engineering.Therefore,it could serve as a reference for engineering practice.