青藏铁路清水河地区路堤最小设计高度的计算

Calculation on Minimum Design Height of Embankment of Qinghai-Tibet Railway in Qingshuihe Area

在青藏铁路多年冻土区路基的设计中,临界高度和最小设计高度是两个关键指标.本文针对青藏铁路清水河试验段特定条件下的试验路堤进行了研究,分析了路堤高度与上限上升高度的关系,并根据试验所得的路堤临界高度值,计算得到了该地区特定条件下路堤的最小设计高度值.研究表明:①青藏高原清水河地区铁路路堤存在临界高度;②清水河地区铁路路堤的临界高度为0.65 m;③清水河地区铁路路堤的最小设计高度为1.63 m.

Critical height and minimum design height are two key index in embankment design of Qinghai-Tibet Railway in permafrost area.The paper,based on research of experimental embankment along Qingshuihe experimental section of Qinghai-Tibet Railway in permafrost area,analyzes the relationship between embankment height and permafrost table rising height,and based on critical height of the embankment by experiment,also obtains minimum design height value of the embankment under the special condition in the area by calculation.The results include： ①there is a critical height for railway embankment in Qingshuihe area of Qinghai-Tibet Plateaus;②the critical height of railway embankment in Qingshuihe area is 0.65 m;③the minimum design height of railway embankment in Qingshuihe area is 1.63 m.