摘要
根据软基处理工程实测资料研究深圳软土的固结变形特性 ,给出了深圳粘土卸载后的次固结系数的计算式。结合一系列次固结试验提出了卸除超载后软基在永久荷载下的工后沉降的分析方法。结果表明 ,对于深圳软土 ,室内试验得到的固结系数和压缩指数与实测推算的相关指标是相近的。
Based on the field data measured from several projects of soft ground improvement in Shenzhen city,as well as the test data from a serial of tests of secondary compression on the soft clay,the behavior of consolidation and deformation of Shenzhen soft clay was studied and a method to estimate the post construction settlement and the equation to estimate the coefficient of secondary compression after the removal of surcharge are proposed.It was found that its coefficient of consolidation and compression index obtained from lab are close to that calculated from the field data.Surcharge can reduce the secondary settlement of a soft foundation by decreasing the coefficient of secondary compression and by delaying the occurrence of secondary compression.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2002年第4期509-514,共6页
Chinese Journal of Geotechnical Engineering
关键词
软土
工后沉降
现场试验
压缩指数
固结系数
次固结变形
深圳市
soft clay
post construction settlement
field test
compression index
coefficient of consolidation
secondary compression
