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| 某水电站坝基G23挤压蚀变破碎带成因及工程性质分析 | |
| 引用本文： | 孟国涛,徐卫亚,杨圣奇,刘金堂,晏新春.某水电站坝基G23挤压蚀变破碎带成因及工程性质分析[J].岩土力学,2008,29(6):1691-1696. |
| 作者姓名： | 孟国涛 徐卫亚 杨圣奇 刘金堂 晏新春 |
| 作者单位： | 1. 河海大学,岩土工程研究所,南京,210098 2. 中国水电顾问集团昆明勘测设计研究院,昆明,650051 3. 景洪水电工程建设管理局,云南,景洪,666100 |
| 摘 要： | G23挤压蚀变破碎带是某水电站坝基的主要工程地质问题.通过对该水电站枢纽区新构造运动及构造体系特征的综合分析,探讨了G23挤压蚀变破碎带的成冈机制.基于典型岩样的物相及微形貌试验成果,分析了G23带构造岩的岩性特征,明确了G23带岩体的物理性质及其转变特征,预测了该挤压蚀变破碎带在工程作用下的变化趋势.结合蚀变岩样三轴压缩试验的变形破坏规律,阐述了G23带对工程作用的响应及其对工程的影响. |
| 关 键 词： | G23挤压蚀变破碎带 成冈 结构构造 物理力学性质 水电站 某水电站 坝基 挤压 蚀变破碎带 工程性质 综合分析 hydropower station foundation belt fractured analysis characteristics engineering mechanism 影响 响应 阐述 破坏规律 变形 三轴压缩试验 |
| 收稿时间： | 2006-08-18 |
Genesis mechanism and engineering characteristics analysis of G23 mylonitization and fractured belt in dam foundation of a hydropower station |
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| MENG Guo-tao,XU Wei-ya,YANG Sheng-qi,LIU Jin-tang,YAN Xin-chun.Genesis mechanism and engineering characteristics analysis of G23 mylonitization and fractured belt in dam foundation of a hydropower station[J].Rock and Soil Mechanics,2008,29(6):1691-1696. | |
| Authors: | MENG Guo-tao XU Wei-ya YANG Sheng-qi LIU Jin-tang YAN Xin-chun |
| Institution: | 1. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 2. Kunming Hydroelectric Investigation, Design and Research Institute, China Hydropower Engineering Consulting Group Co., Kunming 650051, China; 3. Jinghong Hydropower Project Construction & Management Bureau, Yunnan 666100, China |
| Abstract: | The G23 mylonitization and fractured belt located in the dam-foundation of a hydropower station is a main engineering geological problem of the project. Its genesis mechanism has been analyzed based on the characteristics of the new tectonic movement and the tectonic system. With the X-ray diffraction and scanning micrograph analysis, the main mineral components and microstructures of either the fractured rock or the phyllonite are identified. With the conventional triaxial compression testes, the stress-strain characteristic of G23 belt rock is examined. In conjunction with site specific analyses, the pre-existing state of rock mass in G23 belt is expounded. At last, based on physico-mechanical properties, the mass rock’s engineering characteristics are estimated; the influences of the G23 belt are discussed; and the main problems which should be study further are put forward. |
| Keywords: | G23 mylonitization and fractured belt fabric and structure physico-mechanical properties hydropower station |
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