高饱和度非饱和土一维固结解析解及其应用  

One-dimensional consolidation analytic solution of unsaturated soil with high saturation degree and its use

作　　者：金良跃 王喜时 李春贵[3] 魏海云 

机构地区：[1]台州市水利局,浙江台州318000 [2]浙江省第一水电建设集团有限公司,浙江杭州310051 [3]浙江省水利河口研究院,浙江杭州310020 [4]浙江广川工程咨询有限公司,浙江杭州310020

出　　处：《浙江水利科技》2008年第5期39-43,共5页Zhejiang Hydrotechnics

摘　　要：高饱和度非饱和土存在于大坝(或路堤)高含水率的压实土。高饱和度非饱和土中气相主要以封闭气泡形式存于孔隙水中,并随水一起流动。假设高饱和度非饱和土为具有可压缩流体的两相土,考虑水气混合物的压缩性,建立高饱和度非饱和土排水固结方程,获得一维解析解。研究了高饱和度非饱和土的孔压系数、高饱和度非饱和土的排水固结特性及其与饱和土的区别,分析了初始饱和度和初始荷载对高饱和度非饱和土固结特性及其瞬时压缩沉降量的影响。The unsaturated soil with high saturated degree exists in the compacted soil with high water- content coefficient in dams or road embankments. Gaseous phase in the unsaturated soil with high saturated degree is in the pore water mainly by the formof closed air bubbles and moves with water simultaneously. If the unsaturated soil with high saturated degree is two- phase soil which can be compacted and the eompressibility of water and gas mixture is considered, the drainage consolidation equation of the unsaturated soil with high saturated degree can be established, so one - dimensional analytic solution is given. The pore pressure coefficient and drainage consolidation characteristics of the unsaturated soil with high saturated degree, as well as its difference with saturated soil are discussed in the paper. The influence of initial saturated degree and initial loading on consolidation characteristics of the unsaturated soil with high saturated degree and its instantaneous eompression settlement is also analized.

关 键 词：非饱和土 饱和度 压缩性 孔压系数 固结 

分 类 号：TU43[建筑科学—岩土工程] TU433[建筑科学—土工工程]