真空预压联合电渗法加固软基的固结方程  

Analytical theory of soft ground consolidation under vacuum preloading combined with electro-osmosis

作　　者：徐伟[1] 刘斯宏[1] 王柳江[1] 汪俊波[1] 

机构地区：[1]河海大学水利水电学院水工结构研究所,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2011年第2期169-175,共7页Journal of Hohai University(Natural Sciences)

基　　金：国家高技术研究发展计划(863计划)(2007AA11Z115);江苏省自然科学基金(BK2009344)

摘　　要：在Terzaghi固结理论和Esrig电渗固结理论的基础上推导真空预压联合电渗法加固软基的二维固结方程,给出了真空预压联合电渗加固过程中超静孔隙水压力的解析解.通过算例,分析了真空预压联合电渗引起的土体超静孔隙水压力随时间的发展以及在电极间的分布规律.进行了真空预压联合电渗的模型试验,试验后实测土体含水率与通过超静孔隙水压力解析解推算出的含水率基本吻合,且具有相似的分布规律,表明该固结方程是合理的.An analytical consolidation theory of soft ground under vacuum preloading combined with electro-osmosis was established based on the Terzaghi＇s consolidation theory and the Esrig＇s electro-osmotic consolidation theory.The analytical solutions of the excess pore water pressure of the soft ground during consolidation process were obtained.Through an example,the development of the excess pore water pressure with the time and its distribution rules between the electrodes induced by the vacuum preloading combined with electro-osmosis were analyzed.Model tests on soil samples under the vacuum preloading combined with electro-osmosis were carried out.The observed water content of the soil samples after tests agree with those derived by means of the analytical solutions of the excess pore water pressure.They have similar distribution rules,indicating that the analytical consolidation theory is rational.

关 键 词：真空预压联合电渗 固结解析理论 软土 超静孔隙水压力 

分 类 号：U655[交通运输工程—港口、海岸及近海工程]