多年冻土区路堤临界高度计算方法综述  

Overview on Calculation Method of Embankment Critical Height in Permafrost Area

作　　者：李永强 

机构地区：[1]中铁西北科学研究院有限公司,兰州730000

出　　处：《路基工程》2011年第5期40-42,共3页Subgrade Engineering

摘　　要：在多年冻土区,只有当路堤高度大于或等于临界高度时才能保证多年冻土上限不变或上升,这是保证路堤稳定的前提条件。否则,应采取工程措施来保证路堤的稳定性。但由于气候条件、填料以及基底土质和含水量、路堤表面的热状况等条件不同,其路堤的临界高度是不一样的。对我国多年冻土区的青藏公路、青康公路和青藏铁路路堤临界高度的计算方法进行了系统论述。Only if embankment height is higher or equal to critical height of embankment in permafrost area,the upper limit height of permafrost can be guaranteed to be unchangeable or upward,which is the prerequisite for stable embankment.Otherwise,engineering measures should be taken to protect the stability of embankment.However,due to the difference of weather condition,filling material,base soil quality,water content and thermal conditions on the surface of embankment,the critical height of embankment is also different.Therefore,this paper systematically discusses the calculation methods of critical height of embankment in Qinghai-Tibet Highway,Qing-Kang Highway and Qinghai-Tibet Railway in China.

关 键 词：多年冻土 路堤 临界高度 计算方法 综述 

分 类 号：U416.168[交通运输工程—道路与铁道工程]