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青藏铁路多年冻土工程的探索与实践
引用本文:冉理.青藏铁路多年冻土工程的探索与实践[J].铁道工程学报,2007,24(1):32-40,59.
作者姓名:冉理
作者单位:铁道第一勘察设计院,西安,710043
摘    要:研究目的:青藏铁路格尔木一拉萨段全长1142km,是世界上海拔最高、跨越高原多年冻土地段里程最长的铁路,沿线自然环境恶劣,地质条件复杂,工程技术难度大,环境保护要求高,建设过程中面临着许多技术难题。文章从青藏高原多年冻土区特点及主要工程问题,科技攻关工作与采取的措施,所取得的主要阶段性成就等几个方面,对如何更好解决在高海拔多年冻土区修建铁路这一难题,把青藏铁路建设成为“世界一流高原铁路”,进行了深入的阐述,同时提出了需要进一步深化研究的问题。 研究结论:文章经过系统分析和研究,查清了线路通过地区多年冻土的热稳定性、含冰量和不良冻土现象的分布和变化规律,为攻克冻土难题提供了可靠的基础工作保证。对路基工程提出了“主动降温、冷却地基、保护冻土”的设计思想、治理原则和具体工程结构类型。

关 键 词:青藏铁路  冻土  工程  路基  措施
文章编号:1006-2106(2007)01-0032-09
修稿时间:2006-12-26

Exploration and Practice of Construction of Qinghai-Tibet Railway in Permafrost Region
RAN Li.Exploration and Practice of Construction of Qinghai-Tibet Railway in Permafrost Region[J].Journal of Railway Engineering Society,2007,24(1):32-40,59.
Authors:RAN Li
Abstract:Research purposes: The railway between Golmud and Lhasa of Qinghai-Tibet Railway is the highest railway above sea level and longest railway crossing plateau permafrost regions with total length of 1 142 km.Therefore,lots of technical difficulties were met in course of construction of the railway because of bad environmental conditions, complex geological conditions and strict requirement of environment protection. In this paper,the ideas are further expressed on how to solve the problem of construction of railway in permafrost region of high altitude and how to construct(Qinghai-)Tibet Railway into the first-class railway in the world from the aspects of characteristics of permafrost region on(Qinghai-)Tibet Plateau,main engineering problems,the work of tackling key scientific and technical problems,the measures taken for the construction and the main stage achievements made for the construction,and the issues necessary to be(further) researched are also put forward. Research conclusions:Based on the systematic analysis and research,the heat stability,ice content,distribution of(unfavourable) frozen soil and its change regularity of the permafrost region in which the railway line crosses are found out,which can provide basic guarantee for tackling difficult problems of construction of railway in permafrost region.The(design) idea and treatment principle of "lowering temperature actively,cooling subgrade and protection of frozen soil" are presented to the subgrade engineering,and the concrete type of engineering structure is also offered.
Keywords:Qinghai - Tibet railway  soil frozen  construction  subgrade  measure
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