淤泥质土条件下基坑支护设计与数值分析

The Design and Numerical Analysis for Foundation Pit Support under Mucky Soil Condition

淤泥质土的物理性质比较特殊,在此土层中进行大面积的基坑土方开挖有着较大的难度,因此,需要选择合理的支护措施以尽量减少施工扰动对土体的影响,保证基坑安全稳定。文章以苏州某基坑支护工程为研究对象,利用Plaxis软件对基坑的施工过程进行模拟,对比分析围护结构变形的计算结果与监测结果,结论证明采用水泥土重力式挡墙围护结构能有效地控制深基坑施工过程中土体变形,对苏州地区类似基坑的围护设计和施工具有一定指导借鉴意义。

The physical property of mucky soil is rather special,it＇s difficult for pit excavation in this kind of soil.Therefor it need the reasonable surpporting to reduce the influence of construction disturbance to the soil and ensure safety of the foundation pit.The paper is based on a foundation excavation project in Suzhou.It ues Plaxis to simulate the construction process of deep foundation pit.Compaed with the observing value and calculation of the structures deformation, the results prove that the cement-soil gravity wall can effective control the deformation of soil.The studies have guidance and reference significance to design and construction of similar foundation pit engineering in Suzhou.