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.
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)
关键词
工程地质
深部破裂
声波波速
叶巴滩水电站
engineering geology
deep-seated crack
sonic wave velocity
Yebatan hydropower station
作者简介
刘宇（1988-），女，湖北省荆门人，硕士，主要从事土木工程、地质工程方面的教学、科研工作。E—mail：liuyu616@126．com
