| 叶巴滩水电站深部破裂岩体波速特征 |
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| 引用本文： | 刘宇,韩刚,赵其华.叶巴滩水电站深部破裂岩体波速特征[J].地质灾害与环境保护,2016(1):59-64. |
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| 作者姓名： | 刘宇 韩刚 赵其华 |
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| 作者单位： | 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 |
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| 基金项目： | 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) |
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| 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。
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| 关 键 词： | 工程地质 深部破裂 声波波速 叶巴滩水电站 |
ACOUSTIC CHARACTERISTICS OF ROCK MASS INCLUDING DEEP-SEATED CRACK OF YEBATAN HYDROPOWER STATION |
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| Abstract: | The sonic wave characteristics of deep-seated crack rock mass and influence about unloading degree,damage de-gree,intactness index of rock mass and elastic modulus has been discussed by field survey and acoustic test based on deep-seat-ed 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 charac-teristics and sonic wave.The sonic wave of WR rock mass is more than 4 200 m/s,MR is between 3 000 m/s and 4 500 m/s, IR is less than 3 000 m/s.About influence on unloading degree,damage degree and elastic modulus,WR is weak,MR is mod-erate and IR is intense.The rock mass integrity including WR,MR and IR is better,poor and very bad respectively. |
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| Keywords: | engineering geology deep-seated crack sonic wave velocity Yebatan hydropower station |
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