班达水电站下坝址卸荷带特征研究  

Research on Characteristics of Unloading Zone at Lower Dam Site of Banda Hydropower Station

作　　者：何书涛 邓辉[1] 伍小军 肖宇月 苏航 HE Shutao;DENG Hui;WU Xiaojun;XIAO Yuyue;SU Hang(State Key Laboratory of Geohazard Prevention&Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;Sichuan Institute of Geological Engineering Investigation Group Co.,Ltd.,Chengdu 610072,China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]四川省地质工程勘察院集团有限公司,四川成都610072

出　　处：《人民珠江》2020年第6期44-52,共9页Pearl River

基　　金：国家自然科学基金项目(41272332)。

摘　　要：为研究班达水电站下坝址卸荷带特征,首先介绍了卸荷的机理及卸荷带划分的研究背景,然后依据坝区工程概括及斜坡卸荷现象,分别采用裂隙张开度、波速比以及平硐地震波速指标来定量划分卸荷带,最后得到综合划分结果和卸荷带特征。结果表明:卸荷带的发育深度与高程正相关,韧性剪切带会使卸荷深度变大,左岸的卸荷程度总体上要大于右岸,山脊卸荷程度要大于山体冲沟处。In order to study the characteristics of unloading zone at the lower dam site of Banda hydropower station,this paper firstly introduces the mechanism of unloading and the research background of unloading zone division,then according to the project profile and slope unloading condition in dam area,divides the unloading zone quantitatively by the fracture opening,wave velocity ratio and adit seismic wave velocity index,and finally obtains the comprehensive division results and unloading zone characteristics.The results show that the development depth of unloading zone is positively related to the elevation,the ductile shear zone will increase the unloading depth,the unloading degree on the left bank is generally greater than that on the right bank,and the unloading degree on the ridge is greater than that on the gully.

关 键 词：卸荷 卸荷分带 定量划分 卸荷特征 

分 类 号：P554[天文地球—构造地质学]