天津港软土次固结变形特性研究  

Research on Secondary Consolidation Characteristics of soft clay in Tianjin Port

作　　者：姜祺[1] 朱平[1] 刘春海 

机构地区：[1]天津大学,天津300072 [2]天津北洋水运水利勘察设计研究院有限公司,天津300452

出　　处：《港工技术》2016年第3期82-86,共5页Port Engineering Technology

摘　　要：对天津港原状软土进行一维固结试验,研究该地区软土次固结特性。探讨荷载水平、加荷比、加载时间以及应力历史对次固结系数Ca值的影响,得到该地区软土Ca与Cc的关系。试验结果表明:次固结系数Ca随荷载的增大,先增大后减小;超固结状态下土的Ca随荷载的增大而增大;加荷比R改变会造成Ca^P曲线峰值的偏移,Ca随R的变化而变化,加载时间也会对Ca造成影响。该工程软土次固结系数Ca与压缩指数Cc之比在0.023~0.034之间。A series of one-dimensional consolidation tests were conducted to study the secondary consolidation characteristics of soft clay in Tianjin Port. Author researched the influence of consolidation pressure, load ratios, loading time, stress history on secondary consolidation coefficient Ca and got the ratio of Ca and compression index Cc. The results show that Ca increases at first and then decrease salong with the increasing of consolidation pressure. For over-consolidation soft clay, Ca correspondingly increases as the consolidation pressure increasing. The changing of load ratios causes the peak position deviation of Ca -P curve. Loading time also influences Ca. For soft clay of this project, the ratio of Ca and compression index Cc is 0.023 to 0.034.

关 键 词：软土 次固结 次固结系数 固结压力 加荷比 

分 类 号：TU472.1[建筑科学—结构工程]