冻土区典型热融滑塌地温变化及防治效果模拟  

Numerical Analysis of Ground Temperature Regime and Preventing Measures of Typical Thaw Slumping

作　　者：马立峰[1] 牛富俊[2] 刘建坤[1] 吴军 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中国科学院冻土工程国家重点实验室,兰州730000 [3]西安长庆科技工程有限责任公司,西安710021

出　　处：《北京交通大学学报》2009年第4期134-139,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：科技部支撑计划资助(2006BAC07B02);国家自然科学基金资助项目(40471023);自然科学基金国际合作项目(40640420072);中科院"西部之光"联合学者项目

摘　　要：冻土地区斜坡的稳定性很大程度上取决于坡体内温度场的分布状况.在野外观测数据无法完整的反映出热融滑塌发展过程中斜坡温度场分布的情况下,结合青藏公路K3035热融滑塌的气候及工程地质条件,应用有限元方法进行了滑塌过程温度场分布的数值模拟,并与实际观测资料进行了对比,进一步讨论了在滑坎位置填埋碎石的工程防治措施的效果.结果表明滑坎位置下多年冻土不稳定,容易导致斜坡的进一步滑塌,而防治措施能有效遏制滑塌趋势.The slopes in permafrost regions are different from other types. Among the slope instability types, thaw slumping is the most hazardous for engineering projects. And the stability of these slopes is mainly decided by its temperature distribution. However, the temperature distribution in the slope can not be described completely by the ground temperature data of long-term monitoring. Therefore, through using the FE code CEO-SLOPE, the numerical simulation is carried out on a typical thaw slumping. Compared with the ground temperature data of long-term monitoring, this result is more reasonable. Finally, numerical study on the thaw slumping is conducted on the condition that gravel is paved on the slope to protect the frozen soil from thawing.

关 键 词：多年冻土 热融滑塌 数值分析 青藏高原 

分 类 号：P642.1[天文地球—工程地质学]