叶巴滩水电站深部破裂岩体波速特征  

ACOUSTIC CHARACTERISTICS OF ROCK MASS INCLUDING DEEP-SEATED CRACK OF YEBATAN HYDROPOWER STATION

作　　者：刘宇[1] 韩刚[2] 赵其华[2] 

机构地区：[1]西华大学应用技术学院,成都611930 [2]地质灾害防治与地质环境保护国家重点实验室成都理工大学,成都610059

出　　处：《地质灾害与环境保护》2016年第1期59-64,共6页Journal of Geological Hazards and Environment Preservation

基　　金：国家自然科学基金项目(41272333);国家重点基础研究发展计划(973)项目(2011CB013501)

摘　　要：揭示深部破裂岩体波速特征及深部破裂对岩体卸荷、损伤、完整性及弹性模量的影响,以叶巴滩水电站岸坡深部破裂为典型实例,开展深部破裂现象精细测绘与声波测试。研究表明：根据宏观地质特征与波速,可将深部破裂划分为轻微松弛型、中等松弛型、强烈松弛型;轻微松弛型深部破裂岩体纵波波速大于4 200m/s,中等松弛型深部破裂岩体纵波波速3 000~4 500m/s,强烈松弛型深部破裂岩体纵波波速小于3 000m/s;轻微松弛型深部破裂对岩体卸荷程度、损伤程度、强度弱化影响较小,中等松弛型深部破裂次之,强烈松弛型深部破裂影响最为显著;轻微松弛型深部破裂岩体较完整,中等松弛型深部破裂岩体完整性差-较破碎;强烈松弛型深部破裂岩体已处于较破碎-破碎状态。The sonic wave characteristics of deep-seated crack rock mass and influence about unloading degree,damage degree,intactness index of rock mass and elastic modulus has been discussed by field survey and acoustic test based on deep-seated crack of Yebatan hydropower station.Three types of deep-seated crack can be divided as weak relaxed deep-seated crack（WR）,moderate relaxed deep-seated crack（MR）and intense relaxed deep-seated crack（IR）by engineering geological characteristics and sonic wave.The sonic wave of WR rock mass is more than 4 200m/s,MR is between 3 000m/s and 4 500m/s,IR is less than 3 000m/s.About influence on unloading degree,damage degree and elastic modulus,WR is weak,MR is moderate and IR is intense.The rock mass integrity including WR,MR and IR is better,poor and very bad respectively.

关 键 词：工程地质 深部破裂 声波波速 叶巴滩水电站 

分 类 号：TV74[水利工程—水利水电工程] P642[天文地球—工程地质学]