煤田地质与勘探Issue(2)：64-66,3.DOI:10.3969/j.issn.1001-1986.2013.02.015
冻融作用对冻土区路基边坡的影响
The impact of freezing and thawing conditions on the slopes of the roadbeds of the permafrost zone
摘要
Abstract
In the frozen soil areas of highway construction, due to the presence of freezing and thawing, the me-chanical properties of soil of the slopes of the roadbeds change easily in the periodic freezing and thawing. In this background, this paper selects typical slopes of the roadbeds of the Qinghai-Tibet region under different conditions as the target of study, carries out comparative study of the shear strain of the slope by FLAC3D finite difference method. The results showed that shear strain in frozen soil varies very little under freezing conditions, and the slopes of the roadbed is stable. However, when the soil ablation reaches its maximum, the weak belt is formed in freezing and thawing interface with large water content , the shear strain varies a lot and the slopes of the roadbed is unstable. The soil cohesion, internal friction angle, unit weight reduction under the condition of freezing and thawing lead the decrease of shear strength of slope, resulting in large shear strain of roadbed slope. The results provide important references for prevention and control of similar situation of slope of the roadbed in permafrost areas.关键词
冻融作用/冻土路基边坡/稳定性/最大剪应变Key words
freezing and thawing action/slope of roadbed in permafrost soil/stability/maximum shear strain分类
天文与地球科学引用本文复制引用
鲍挺,梅子广,陈小龙,王磊..冻融作用对冻土区路基边坡的影响[J].煤田地质与勘探,2013,(2):64-66,3.基金项目
岩土钻掘与防护教育部工程研究中心开放课题(201107) （201107）
