文档介绍：三峡大学工程硕士专业学位论文
内容摘要
青藏铁路的建设是党中央、国务院作出的重大战略决策,是几代中央领导关心和
全体中国人民共同努力的结晶,是西部开发的标志性工程,举世瞩目,意义重大。
青藏高原具有独特的高原自然环境和气象条件,由于青藏铁路格尔木至拉萨段需
要横穿青藏高原 550km 的多年冻土地带,故而其在修建过程中面临着多年冻土、高寒
缺氧、环境保护三大难题。据此为基点,论文以青藏铁路 19 标段为工程依托,通过
一系列研究探讨,旨在从一定程度上解决上述三大难题。首先,论文结合高原冻土区
地质条件与环境气候特征,深入分析了桥梁桩基旋挖钻机开挖成孔、冲击钻机开挖成
孔和人工开挖成孔三种施工工艺,并将此三种方法进行有机结合与调整,提出了青藏
铁路 19 标段相异承载力冻土区桥梁桩基开挖最合理有效的施工手段,从而解决了冻
土区桥梁桩基施工质量与进度控制的关键问题,合理配置了施工与自然资源。其次,
论文根据多年冻土区桩基灌注过程中的特殊要求,研究了高原冻土区混凝土性能、强
度、灌注温度、时间及养护等问题,提出了高原冻土区桥梁桩基的具体灌注方案,确
保了桩基的成桩质量。另外,论文通过探讨高寒缺氧与环境保护问题,总结归纳出青
藏铁路修建工程中适宜的施工安全与环境保护机制及相应的高原保健防范措施。
本论文的研究工作在一定程度上确保了青藏铁路桥梁桩基的施工质量和施工进
度,有力地推动了青藏铁路修筑的建设步伐,也为今后青藏铁路运营的安全与稳定打
下坚实的基础。同时,本论文的研究成果亦对高原多年冻土区路桥梁桩基施工技术理
论作出了有益的完善与补充,可为日后国内外类似工程施工提供重要的理论指导和借
鉴,意义较为显著。
关键词:青藏铁路桥梁桩基多年冻土
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三峡大学工程硕士专业学位论文
Abstract
Qinghai-Tibet railway is an important and strategic decision made by the party central
committee and the State Council. At the same time, it is the crystal of the several
generations of the collective leadership of the Party mittee and all the Chinese
the symbol of the western development project, it has attracted worldwide
attention with the great significance.
The Qinghai-Tibet railway project between Golmud and Lhasa extends 550 km and
lies in Tibetan Plateau ,which has the distinctive natural environment and weather
conditions, so that the railway builders always meet with permafrost, severely cold and
oxygen deficiency problems and environmental protection in Qinghai-Tibet railway
construction. Based on the-19-bench of Qinghai-Tibet railway, the paper aims to solve
above problems to a certain degree. At first, according to plateau climate and geographic
conditions, the paper analyzes the hole-marking technologies of percussive driller,
helicoids driller and manpower, e up with the most effective means of bridge pile
foundation in Qinghai-Tibet railway construction bining them together. As a
result, the key prob