青藏公路多年冻土地区公路工程地质研究回顾与展望  

Qinghai-Tibet Highway Engineering Geology in Permafrost Regions:Review and Prospect

作　　者：汪双杰[1] 王佐[1] 袁堃[1] 赵永国[1] 

机构地区：[1]中交第一公路勘察设计研究院有限公司多年冻土区公路建设与养护技术交通行业重点实验室,陕西西安710065

出　　处：《中国公路学报》2015年第12期1-8,32,共9页China Journal of Highway and Transport

基　　金："十二五"国家科技支撑计划项目(2014BAG05B01;2014BAG05B03);交通运输部重大科技专项项目(2013 318 490 010)

摘　　要：为了研究规划中青藏高速公路沿线多年冻土地质特征,首先回顾了青藏公路多年冻土地区40余年工程地质研究历程,对高含冰量冻土与地下冰分布规律、多年冻土地表辨识标志以及多年冻土上限的勘察与确定等内容进行论述,并进一步讨论了多年冻土区公路工程地质区划与评价、冻土温度场分析特征、冻土区划与冻土地温的关系、公路冻土综合分类标准及多年冻土在气候转暖背景下退化的预警预报。在此基础上,结合高速公路高线性指标以及大尺度路基标准等技术要求,提出了新的冻土区工程地质研究目标。研究结果表明:新建冻土区高速公路需要重点关注人为活动层以及路基本体中水-热-力的状态研究;在获得长期监测数据的基础上继续深入开展冻土路基预警预报技术,并对预报模型的准确性进行验证;对现有多年冻土区路基工程措施的适应性需作进一步研究,并需结合高原冻土地区最新的工程观测结果对原有冻土路基设计原则进行修正。In order to analyze the geology characteristic of permafrost along planning QinghaiTibet Expressway,more than 40 years＇ researches on Qinghai-Tibet Highway engineering geology in permafrost regions were reviewed first,and the high ice content permafrost and ground ice distribution characteristics,ground surface identification feature of permafrost and permafrost table investigation were expounded.Furthermore,the highway engineering geology regionalization and evaluation,permafrost temperature field analysis characteristic,the relation between permafrost regionalization and ground temperature,highway permafrost classification criterion and permafrost forecasting in warming climate were discussed.Based on the research contents above,combined with technical requirements of high alignment index and large scale embankment of expressway,some new research targets of permafrost engineering geology were proposed.The results show that new build expressway needs to focus on the water-heat-stresscoupling process in man-made active layer and embankment.Permafrost embankment disease early warning and forecast should be carried out in a deep-going way based on the long-term monitoring,and further the accuracy of forecasting model is verified.The adaptability of permafrost embankment engineering measures should be explored and the original design principle of embankment in permafrost regions should be revised combined with the latest engineering observation results.

关 键 词：道路工程 青藏公路 综述 工程地质 多年冻土 

分 类 号：U419.92[交通运输工程—道路与铁道工程]