边坡渗流对冻土地区路基稳定性的影响分析  

Analysis of the Influence of the Slope See page on Embankment Stability

作　　者：李东庆[1] 魏春玲[2] 吴紫汪[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000 [2]兰州大学出版社,甘肃兰州730000

出　　处：《兰州大学学报（自然科学版）》2000年第3期175-179,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金!(4 970 10 0 4 );中国科学院知识创新经费资助项目

摘　　要：利用数值模拟方法 ,分析了在多年冻土地区修筑路堤后 ,夏季路基边坡积水通过路堤及在其下土壤的渗流过程中 ,由于对流换热所引起的路堤基底的不稳定现象 .通过计算机数值模拟进一步证实 ,夏季路基边坡积水可导致路基基底之下的多年冻土上限下降 ,并使路基下形成凹型融化核或扩大已有融化核的深度和范围 ,从而加大路堤的融化下沉量和冬季的冻胀量 ,造成路基稳定性程度明显下降 .The unstable phenomen a of embankment on frozen soil were analyzed in summer by using the numerical mode ling, which was caused by the convection heat transfer of water from the slope a fter the construction of the embankment. The conclusions were that the permafros t table under the roadbed would fall and the concave thawed core was formed or f urther enlarged, thereby the thawing settlement in summer and frost heave in wi nter would be increased, so that the stabilities of embankment would obviously b e decreased.

关 键 词：边坡渗流 路基 融化核 稳定性 冻土地区 

分 类 号：U416.168[交通运输工程—道路与铁道工程]