寒区土质边坡冻融滑塌影响因素的研究  

Study on the Influencing Factors of Soil Slope Freeze-thaw Sliding Collapse in Cold Regions

作　　者：武鹤[1,2] 刘春龙[3] 葛琪[2] 

机构地区：[1]中国地质大学工程学院,湖北武汉430074 [2]黑龙江工程学院土木与建筑工程学院,黑龙江哈尔滨150050 [3]西安理工大学岩土工程研究所,陕西西安710048

出　　处：《水利与建筑工程学报》2015年第1期1-5,共5页Journal of Water Resources and Architectural Engineering

基　　金：黑龙江省自然科学基金项目(E201117)

摘　　要：目前研究寒区土质边坡冻融滑塌的方法很多,大多没有考虑坡端阻力的影响。基于块体的极限平衡理论,在假定春融期边坡的滑移面为平行于坡面的平面且滑动体下部受坡端阻力作用的条件下,用极限平衡法推导了寒区土质边坡冻融滑塌安全系数的解析表达式,并讨论解析式中的各项参数对边坡稳定性的影响,表明春融期粘聚力c对边坡安全系数的影响显著。通过对工程实例的计算分析,比较了理论公式和数值模拟计算结果的差异,证明了理论公式可以应用于实际工程之中,对春融期土质边坡滑塌治理有很好的指导意义。At present ,there are many studies of freez-thaw sliding collapse of soil slopes in cold regions ,but the effect of slope-side resistance is hardly considered in any of these .Based on the limit equilibrium theory of the block ,the ana-lytic expression of freeze-thaw sliding collapse coefficient of soil slopes in cold regions was deduced on the assumption that the slip plane of the slope was parallel to slope surface plane at the spring thawing period ,and the bottom of the sliding plane was affected by slope-side resistance force .And then the influences of various parameters of the analytic expres-sion on the slope stability were discussed .It was concluded that the cohesive force at the spring thawing period had a sig-nificant impact on the slope safety factor .In an actual engineering project ,the results of the theoretical formula and sim-ulation calculation were compared .It is proven that the theoretical formula can be applied to practical engineering and will be of great guidance to the collapse control of soil slopes at spring thawing period .

关 键 词：土质边坡 冻融滑塌 边坡稳定性 极限平衡法 安全系数 

分 类 号：U416.14[交通运输工程—道路与铁道工程]