西藏旁多水利枢纽灌溉输水洞遥感工程地质研究  

Remote sensing engineering geological investigation on irrigation tunnel of Pangduo Hydro-complex

作　　者：胡宗云[1] 李书[1] 姬俊虎[1] 

机构地区：[1]水利部长江勘测技术研究所,湖北武汉430011

出　　处：《人民长江》2011年第22期42-44,共3页Yangtze River

摘　　要：旁多水利枢纽输水隧洞穿越地质地貌复杂的恰拉山高寒地区,若采用常规的工程勘测方法,受到的技术局限较大。通过SPOT、ETM遥感影像信息,在GIS工程环境下进行地质解译与现场复核,对隧洞线路的工程地质条件和存在的工程地质问题进行了分析研究,结果表明:线路区出露的岩系为石炭岩、三迭系及始新世侵入岩,大地构造上属于拉萨地块,是强烈的构造抬升区;线路区及外围未见环状水系、缓丘山峦延绵等岩溶地貌;但因深埋输水隧洞穿越恰拉山体,其软硬岩性的差异以及不利地质结构面的组合,将影响洞室稳定且易产生工程地质问题。The water conveying tunnel of Pangduo Hydro-complex is located at alpine Qiala Moutain area in Tibet,which has complex geological condition,thus the application of conventional engineering survey measures is restricted in this project.By SPOT,ETM remote sensing images,through geological interpretation and filed check under GIS environment,we analyze the geological conditions and problems in the planned tunnel line.The results show that the outcrop along tunnel line is carbonate rock and intrusive rock in Eocene and Triassic age;the tectonics belongs to Lhasa block,which is a strong tectonic uplift zone;the karst landform such as annular watershed and gentle hill are not found along the line.However,the deep-buried tunnel crosses the mountain body,and the great differences of hard-soft rock alternation and unfavorable geological interfaces would bring difficulties to tunnel excavation.The remote sensing engineering geological investigation has significant prospect in early engineering geological survey.

关 键 词：输水隧洞 工程地质条件 遥感地质 遥感解译 旁多水利枢纽 

分 类 号：P642[天文地球—工程地质学]