作　　者： (陈茜）; (郭光玲）; (郭鸿）;

机构地区： 陕西理工大学土木工程与建筑学院,陕西汉中723001

出　　处： 《中国科技论文》 2017年第13期1526-1530,共5页

摘　　要： 为研究考虑源汇项的一维稳态流下非饱和土有效应力参数和吸应力铅直分布,依据Vanapalli和Fredlund有效应力参数,推导有效应力参数及吸应力铅直分布理论解,并与无源汇项时的理论解对比验证;计算并分析典型土类有效应力参数及吸应力铅直分布规律。结果表明:源汇项为非0常数时,土层水力参数、水文参数等控制有效应力参数和吸应力铅直分布。随距地下水位高度增大,非饱和砂土、粉土和黏土有效应力参数呈递减趋势;砂土吸应力呈先增、后减趋势;黏土吸应力呈增大趋势;蒸发条件下,非饱和粉土吸应力呈先增、后减趋势;入渗条件下,呈增大趋势。 To study the effective stress parameters and absorbing stress vertical distribution considering the source-sink term un-der one-dimensional steady flow conditions, the general solution of effective stress parameters and absorbing stress vertical distri-bution was obtained through Vanapalli and Fredlund effective stress parameters formula, which was verified with the solution of effective stress parameters and absorbing stress vertical distribution without source-sink term as nonzero constant. The effective stress parameters and absorbing stress vertical distribution were also calculated and analyzed in typical soil type under different flow direction and source-sink term conditions. The result showed that source-sink term is nonzero constant and the soil effective stress parameters and absorbing stress was controlled by hydrological parameters and hydraulic parameters. The effective stress parameters of unsaturated sand, silt and clay decreases with the distance from the underground water level increasing. With the increase of underground water level, the absorbing stress of unsaturated sand increased first and decreased afterwards. For clay, it was increasing. Under evaporation conditions,the absorbing stress of unsaturated silt increased first and decreased afterward. Under infiltration conditions, the absorbing stress of unsaturated silt increased.

关 键 词： 一维稳态流 源汇项 有效应力参数 吸应力 铅直分布