摘要
研究目的:随着西部大开发的推进,我国在青藏高原地区修建了青藏铁路等工程,青藏公路的改建工程最近也在展开,这两条线路穿越了550km的多年冻土区。青藏铁路路基自2001—2002年修完以来已有五六年的时间,从2006年7月开始试运营到现在也有将近2年的时间了。笔者在2007年8月底和9月初对青藏铁路格拉段多年冻土区路基状况作了一个全面的调查,在调查中发现了不少问题,其中路堑的问题最为突出。研究结论:依据这次调查中病害严重断面,以K1115断面和K1128断面为重点分析断面,结合2008年3、4月份调查的钻孔的水文地质资料和多年冻土地区的特殊环境,判断人为上限形态,依据冻土强度室内试验和经验公式,对路堑边坡进行稳定性分析,指出路堑边坡病害的病因和提出防护措施。
Research purposes： With the development of the western China, the Qinghai - Tibet Railway has been built on Qinghai -Tibet Plateau, and the Qinghai -Tibet Highway is now under reconstruction. They all cross the 550 km long permafrost region. Based on the investigation, this paper analyzes the problems related to the subgrade of Qinghai - Tibet Railway built in 2001 -2002, especially the road cutting problem. Research conclusions： Focusing on the seriously default sections of K 1 115 and K 1 128 judged as the artificial permafrost table, the analyses of the stability of the cutting slope is made in combination with the investigated hydrogeology information made in April, 2008 and the special environment in permafrost region, the reasons for the subgrade problems are pointed out and the protection measures are presented based on the lab tests and test equations for frozen soil.
出处
《铁道工程学报》
EI
北大核心
2009年第1期32-35,共4页
Journal of Railway Engineering Society
基金
科技部科技支撑计划项目(2006BAC07B02)
关键词
多年冻土
青藏铁路
人为上限
路堑边坡
permafrost
Qinghai - Tibet Railway
artificial permafrost table
cutting slope
