| 深圳大鹏澳断裂构造及其对库坝区水文工程地质条件的影响 |
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| 引用本文： | 黄玉昆,陈国能,王建华,赵不亿,夏法.深圳大鹏澳断裂构造及其对库坝区水文工程地质条件的影响[J].中山大学学报论丛,1992(1). |
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| 作者姓名： | 黄玉昆 陈国能 王建华 赵不亿 夏法 |
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| 作者单位： | 中山大学地质学系，中山大学地质学系，中山大学地质学系，中山大学地质学系，中山大学地质学系 |
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| 摘 要： | 本文从断裂构造及其活动性分析入手,结合地形、岩性和水文地质条件,讨论了库区蓄水后可能产生的坝基渗漏及绕坝渗漏问题。库区发育了NNW、NW、NE及NEE向几组断裂,但它们的大多数为压性或压扭性断裂、断面闭合、构造岩硅化甚强、致密坚硬、整体性良好。而张性断裂又多被后期岩脉充填,且与初选坝址平行分布,有利于防止库区内外水体的沟通。同时库区的所有断裂均未见其切割全新统地层。同位素测年资料表明,库区几条主要断裂的最后一次活动时间发生在晚更新世初期,目前属于不活动断裂。基于各方面的分析结果认为,库区水体向外渗漏或相邻海域海水向库区灌入的可能性较小。
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| 关 键 词： | 坝基渗漏 绕坝渗漏 不活动断层 深圳市大鹏澳 |
Fracture Structures and Their Influenice on Hydroengineering Geological Condition of the Reservoir and Dam Site at Dapengao in Shenzhen City,Guangdong |
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| Huang Yukun Chen Guoneng Wang Jianhua Zhao Buyi Xia Fa.Fracture Structures and Their Influenice on Hydroengineering Geological Condition of the Reservoir and Dam Site at Dapengao in Shenzhen City,Guangdong[J].Supplement to the Journal of Sun Yatsen University,1992(1). |
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| Authors: | Huang Yukun Chen Guoneng Wang Jianhua Zhao Buyi Xia Fa |
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| Institution: | Huang Yukun Chen Guoneng Wang Jianhua Zhao Buyi Xia Fa Department of Geology |
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| Abstract: | Through analysing fracture structures and their activity, and according to the landform, lithologic and hydrogeological conditions, the problems of leakage under dam foundation and leakage around dam possibly to occur after water is reservoired have been discussed in this paper. There are four sets of fractures respectively trending NWN, NW, NE and ENE in the reservoir area, most of them being compressive or compresso-shear and closed. Silified rather strongly, the tectonites are compact and stiff, with the rock integrity being good. Also, since most of the tensile fractures are filled with later veins and are paralleled with the preliminarily chosen dam site, it is helpful to prevent the exchange of water between the reservoir and the sea. In addition, all the fractures tn the reservoir area have not been observed to have cut the Holocene strata. The data of isotopic dating show that the latest faulting of the main fractures in the reservoir area took place in the early stage of late Pleistocene, and the fractures are inactive in the recent epoch. Based on various analyses, the authors consider that the possibility of leakage out of the reservoir or leakage into the reservoir from the neibormg sea is rather small. |
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| Keywords: | leakage under dam foundation leakage around dam inactive fault Dapengao in Shen zhen City |
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