青藏铁路施工中的主要工程地质问题及处理方法

研究目的：青藏铁路地处青藏高原腹地，自然环境和地质条件独特，加强施工期地质问题研究，进一步优化和完善设计，是建设世界一流高原冻土铁路的必然要求。研究方法：紧密结合施工，开展多期次现场巡查和冬季设计复查，针对问题，进行必要的勘探、化验和专题研究，论证其产生原因、工程危害特点，制定切实可行的处理措施。研究结果：查明了青藏铁路施工中出现的新增工程地质问题，制定的处理措施可行，效果良好。研究结论：青藏高原特殊的冷暖季节气候条件，工程施工对微地形地貌、风沙运移、地表水及地下水径流条件的改变，是造成青藏铁路施工中各类新增工程地质问题的主要原因。强化施工地质工作，动态设计、动态补强优化，是保障铁路工程建设质量的重要环节。

Main Problem and Treatment of Engineering Geology in Construction of Qinghai-Tibet Railway

Research purposes: Qingzang railway locates in the hinterland of Qingzang altiplano,it has special natural and geological condition.Enhancing the study of geological problens in construction,optimizing and consummating the designation were essential demand for constructing the best railway of frozen earth of altiplano in the world.Research methods: Linked with construction,we take local inspection time after time and winter callback.Aimed to the problems,we do essential convey,test and subject research,demonstrated cause and feature of harming engineering to set down the viable measure of managing.Research results: The paper finds out new engineering geological problems while construction of railway.The established treatment measure was viable and its effect was better.Research conclusions: The cause of appearing new engineering geological problem in construction of Qingzang railway was special climate condition,the change of tiny landform,sand blown by wind,surface water and underground water flowing,which were all caused by railway construction.It was important tache for ensuring qualification of engineering construction to strengthen construction geology,dynamically design and optimize enhancing intension.