【作者】 曹玉新； 原思成； 严学斌； 张鲁新；

【Author】 Cao Yuxin Yuan Sicheng Yan Xuebin Zhang Luxin(School of Civil & Architecture engineering, Beijing Jiaotong University, Beijing 100044;Administration Headquarters of Qinghai - Tibet Railway Construction, Geermu 816000;China Railway Shisiju Group Corporation, Jinan 250000)

【机构】 北京交通大学土木建筑工程学院；

【摘要】 气温升高和降水条件变化对青藏铁路的多年冻土产生深刻影响。本文从全球性气温变化背景和青藏高原气候变化的背景出发,分析和论述了近30年青藏铁路五道梁地区气温变化特征及其对多年冻土的影响,并通过对块石层路基作用机理和稳定性影响因素的分析,指出气温的多年变化和气温的季节变化是影响冻土区块石层路基可靠性的主要气温变化指标,抵御气温变化影响必须对块石层厚度、宽度等主要设计参数进行调整,才能保证该地区块石层路基的可靠性。这一结论已经在该地区路基工程设计和施工中得到广泛应用。更多还原

【Abstract】 The rising atmospheric temperature and varying precipitation condition made deep effect on the permafrost on Qing-Tibet Plateau. In this paper analysis was made on the background of varying atmospheric temperature all over the world and of Qing - Tibet Plateau to analyze the variation characteristic of atmospheric temperature in Wudaoliang region during the past 30 years. And points out that annual and seasonal variation are the most important influence factor to the reliability of the roadbed with stone layers in permafrost area. Suggestions were given that design parameters of the stone layer must be modified in order to the reliability.Such conclusion has been widely applied in the course of design and construction in this region.更多还原