南四湖地区结构性粘土成因分析  

Analysis on Formation Cause of Structural Clay in Nansi Lake Region

作　　者：雷文[1,2] 陈亮[1,2] 张红宇[2] 赵小龙[2] 王亚坤[2] 李剑超[2] 丁小闯[2] 

机构地区：[1]河海大学 岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学岩土工程研究所,江苏南京210098

出　　处：《水利与建筑工程学报》2013年第1期175-179,共5页Journal of Water Resources and Architectural Engineering

基　　金：重庆交通大学水利水运工程教育部重点实验室暨国家内河航道整治工程技术研究中心开放基金资助(SLK2011A02)

摘　　要：对南四湖地区粘土中裂隙与孔洞的存在特性进行分析,通过对土体前期固结应力的计算,指出结构性粘土属于弱超固结土,其结构性的形成不是由于应力原因,而是由于湖堤的水文地质历史,为湖西大堤的加固防渗方案提供了强有力的选择依据,同时指出结构性粘土具有一定的膨胀性。Through analyzing the characteristics of the cracks and holes in the clay of Nansi Lake area and calculating the former consolidation stress of the soil, it is obtained that the structural clay belongs to the weak over-consolidated soil. The structural formation is not caused by stress but the history of hydrogeology. All these as mentioned above could pro- vide strong bases for selecting the seepage control scheme of the west dam of Nansi Lake, at the same time, it is indicated that the structural clay has a certain expansion.

关 键 词：结构性粘土 裂隙 孔洞 弱超固结土 膨胀性 

分 类 号：TU44[建筑科学—岩土工程]