隐伏活断层的综合地球物理勘探方法——以青川县城区活断层为例  

Comprehensive geophysical exploration methods of hidden active faults——an example of Qingchuan country district hidden active faults

作　　者：李大虎[1] 何强[1] 石金虎[2] 刘保金[2] 

机构地区：[1]四川省地震局工程地震研究院,四川成都610041 [2]中国地震局地球物理勘探中心,河南郑州450002

出　　处：《世界地震工程》2011年第2期164-169,共6页World Earthquake Engineering

基　　金：中国地震局地震科技星火计划项目(XH1021Y)

摘　　要：汶川8.0级特大地震,使青川县城区遭受了严重的破坏,并且出现了条带状破坏增高异常现象,灾后的恢复重建工作受到隐伏断裂、山体变形、强烈的余震活动等因素的制约,尤其是通过城区的隐伏活断层,开展地球物理定位工作,查明其展布的位置势在必行。在此次青川县城区活断层定位过程中采用了综合地球物理勘探方法,查明了北东向的平武-青川断裂隐伏段城区内的展布情况,并根据其解译成果进行了探槽的开挖验证,确定了主干断裂及其分支断裂的具体通过位置,为灾后的恢复重建工作提供了科学依据。Wenchuan 8.0M large earthquake makes Qingchuan city suffer severe damage, and the increased abnor- mal destruction with banded forms occurred. Post-disaster restoration and reconstruction work has been restricted by buried fault, deformation of the mountain, a series of occurred strong aftershock activities and other factors, in par- ticularly, through buried active faults of the city, the geophysical positioning method to identify the location of fault distribution is imperative. Geophysical exploration methods are used to positioning the locations of Qingchuan active faults, the distribution case of buried faults of the flat NE Pingwu-Qingchuan in the city is identified, the excavating and verifying work of exploratory trench are carried out according to the geophysical interpretation, the locations of the main fault and its branches are identified, and the scientific basis for the post,disaster restoration and reconstruction work is provided.

关 键 词：汶川8.0级特大地震 活断层 青川 综合地球物理勘探 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] P315.2[交通运输工程—道路与铁道工程]