摘要
采用三维非线性分析程序FLAC^3D对软土基坑止水、开挖及支护结构进行模拟分析.分析表明:采用嵌入坑底深度5.0 m的基坑止水桩可保证渗流稳定性要求;角点和逸出点之间易达到临界水力梯度,应在该处加固坑壁防止事故发生;坑周水平变形和沉降位移基本满足或略超过规范要求,但坑底回弹变形较大,应及时施工坑底抗拔桩和基础垫层,并加快上部主体建筑的施工进度.模拟分析结果证实了软土地区采用止水帷幕+双排桩+锚索施工的可行性和合理性.
The simulation analysis of soft soil pit water stop,excavation and support structure was carried out by FLAC^3D,a three-dimensional nonlinear analysis procedure.The analysis shows that taking the waterproof pile of foundation pit embedded in the pit depth of 5 m,can ensure seepage stability;The critical hydraulic gradient is easily reached between the corner point and the overflow point;The horizontal deformation and subsidence meet specification requires or just over;The rebound deformation of the bottom of the pit is large,and the pile foundation and foundation cushion should be built in time,and the construction progress of the upper main building should be accelerated.The numerical simulation confirms that the feasibility and rationality of waterproof curtain,double-row piles and anchor in the soft soil area.
作者
李新祥
LI Xinxiang(School of Architectural and Civil Engineering,Shenyang University,Shenyang 110044,China)
出处
《沈阳大学学报（自然科学版）》
CAS
2019年第6期514-518,共5页
Journal of Shenyang University：Natural Science
基金
辽宁省自然科学基金资助项目(20180550192)
关键词
基坑
软土地层
止水帷幕
FLAC^3D
开挖稳定
foundation pit
soft soil area
curtain for waterproof
FLAC^3D
excavation stability
