摘要
结合南京长江4桥北锚碇沉井的施工特点,在现场抽水试验基础上,综合确定了沉井排水下沉期间的渗透系数,由此理论计算单井出水量、总涌水量等并进行排水设计,实际涌水量略大于理论值;根据有效应力原理,认为沉井降水对潜水含水层的影响很小,沉降主要由承压水含水层压缩引起,由此得到的沉降曲线与实测结果总体吻合较好。
Combined with construction of north anchorage caisson, field Permeability coefficient was acquired for dewater sinking. Water yield of pumping tests single well and were carried out. total water inflow of caisson excavation were calculated. It is found that the measured amount of total water inflow is slightly larger than the theoretical value. Based on effective stress principle, the compression of phreatic water aquifer caused by dewater is almost negligible, and the ground settlement is mainly composed of confined water aquifer compression. The calculated settlement curve along the levee was in good agreement with the measured data.
出处
《土木建筑与环境工程》
CSCD
北大核心
2010年第5期135-141,共7页
Journal of Civil,Architectural & Environment Engineering
关键词
沉井
渗透系数
降排水下沉
涌水量
沉降
caisson
permeability coefficient
dewater sinking
water yield
settlement
