| 锦屏水电站引水隧洞大理岩卸荷变形特性试验 |
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| 引用本文： | 秦玉春,朱珍德,王战鹏.锦屏水电站引水隧洞大理岩卸荷变形特性试验[J].岩土力学,2006,27(Z1):1084-1088. |
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| 作者姓名： | 秦玉春 朱珍德 王战鹏 |
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| 作者单位： | 1. 河海大学 岩土工程研究所，江苏 南京 210098；2. 深圳市岩土工程公司，广东 深圳 518028 |
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| 基金项目： | 国家自然科学基金委员会、二滩水电开发有限公司雅砻江水电开发联合基金项目(50539090)与国家自然科学基金项目(50479021) |
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| 摘 要： | 锦屏水电站属于国家重大工程。其引水隧洞洞线长、洞径大、埋深大，围岩岩性组合复杂，断裂构造发育，特别是该区为高地应力区。隧洞的开挖过程，就是围岩的卸荷过程。通过对大理岩在保持轴向应力不变的条件下的卸围压试验的分析，讨论了卸围压时围压与弹性模量、泊松比、轴向应变的关系，得出了卸围压时大理岩的轴向变形呈非线性特性的结论。
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| 关 键 词： | 大理岩 卸围压 弹性模量 泊松比 轴向应变 线弹性理论 |
| 收稿时间： | 2006-06-25 |
Unloading strain characteristic experiments on marble of diversion tunnel of Jinping Hydropower Station |
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| QIN Yu-chun,ZHU Zhen-de,WANG Zhan-peng.Unloading strain characteristic experiments on marble of diversion tunnel of Jinping Hydropower Station[J].Rock and Soil Mechanics,2006,27(Z1):1084-1088. |
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| Authors: | QIN Yu-chun ZHU Zhen-de WANG Zhan-peng |
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| Institution: | 1. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China;
2. Shenzhen Geotechnical Engineering Company, Shenzhen 518028, China |
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| Abstract: | The Jinping Hydropower Station is a national important large-scale project. The tunnel of the project is very long and has a big diameter; and it is buried very deep. Its wall rocks are very complex in tectonic geology; and the faulted structure is very developed, especially this area is a high ground stress area. The process of excavation is the process of unloading for wall rocks. Through analyzing the confining pressure unloading experiments on marble with constant axial load, we discuss the relationships between elastic modulus, Poisson’s ratio, axial strain and confining pressure; and a conclusion that the axial strain of marble is nonlinear when confining pressure was unloading, is drawn. |
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| Keywords: | marble confining pressure unloading elastic modulus Poisson’s ratio axial strain linear elastic theory |
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