【作者】 蒋钰峰； 吴光； 赵志明；

【Author】 Jiang Yufeng;Wu Guang;Zhao Zhiming;Faculty of Geosciences and Environmental Engineering of Southwest Jiaotong University;

【机构】 西南交通大学地球科学与环境工程学院；

【摘要】 川藏铁路在穿越金沙江、澜沧江、怒江三江并流的南北向构造带时,受到复杂地质条件的影响。铁路工程面临地形高差大、地质灾害规模大、地质构造活动强等一系列工程地质问题。基于山区夷平面概念分析不同高程区域不良地质发育和分布特征,提出了高原夷平面、高原盆地夷平面和三江侵蚀面以及高原—高原盆地夷平面过渡带和高原盆地夷平面—三江侵蚀面过渡带的"三面两带"分区思路,根据不同的江河流域,在剖面上划分出五个区段模型。进而采用信息量分析技术研究了线路区域地质灾害的工程风险性。夷平面间的过渡带是地质灾害发育的高风险区,为川藏铁路综合选线提供了工程地质平面剖面选线思想。更多还原

【Abstract】 Due to the complex geological conditions,the Sichuan-Tibet railway faces a series of engineering geology problems such as large topographic relief,large-scale geological hazards,strong geological tectonic activity and so on,when it crosses the north-south Three Parallel River Region of the Jinsha River,Lancang River and Nujiang River.At different elevation,the geological disasters and distribution characteristics are analyzed based on the concept of deplanation plains in mountain area.The N-S mountain area,with the characteristics of high altitude and high gap in altitude,develop three-level deplanation plains and two regions.Five models of different zone are divided in profile based on different river’s basin.And then the engineering risk of geologic hazard in the railway area is investigated by using the informational method.The results show that the transitional zones between the plains are of high risks for geological hazard development.更多还原