超固结对防渗墙与高塑性粘土接触结构渗透性的影响  

Influence of Over-consolidation on Permeability of Contact Zone between Concrete Cutoff Wall and High Plasticity Clay

作　　者：李想[1] 盛金昌[1] 詹美礼[1] 罗玉龙[1] 何淑媛[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2012年第9期70-72,129,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(50779012;51009053;51079039);教育部博士点基金--新教师类基金资助项目(20100094120004)

摘　　要：试验中概化了高塑性粘土保护层与混凝土防渗墙之间的接触冲刷过程,模拟了心墙与混凝土防渗墙连接部位过渡区粘土的应力状态和渗流状态,对比了超固结土体与普通土体的渗透性。结果表明,超固结土体在短时间内渗透性明显下降,下降的程度与土体所处的工作应力状态有关,且随时间增长,超固结土渗透性有逐渐恢复的趋势,为高塑性粘土经不同应力历史后的工作状态预测提供了依据。The transition zone of the connection part between core wall and concrete cutoff wall often fill with high plasticity clay as protective layer. The working status of high plasticity clay is affected by the pressure state and seepage state around. The generalization hypothesis of the erosion process is performed to simulate the stress state and seepage conditions of the transition zone of clay. And then the permeability between overconsolidated soil and ordinary soil is compared. The results show that the permeability of overconsolidated soil is obviously decreased during the first period, and the decreased degree is related to the stress state of soil; with increase of time, it is gradually recovered. Therefore, it can provide scientific basis for forecasting the working status of high plasticity clay under the different stress history.

关 键 词：超固结 渗流 高塑性粘土 混凝土防渗墙 接触冲刷 

分 类 号：TV443.1[水利工程—水工结构工程]