| 大岗山水电站坝区初始地应力场反演分析 |
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| 引用本文： | 张建国,张强勇,杨文东,张欣.大岗山水电站坝区初始地应力场反演分析[J].岩土力学,2009,30(10):3071-3078. |
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| 作者姓名： | 张建国 张强勇 杨文东 张欣 |
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| 作者单位： | 1.山东大学 岩土与结构工程研究中心，济南 250061；2.山东正元建设工程有限责任公司，济南 250101 |
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| 基金项目： | 国家重点基础研究发展计划资助，国家自然科学基金项目资助，教育部新世纪优秀人才支持计划资助，山东省自然科学基金项目资助 |
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| 摘 要： | 针对大岗山水电站坝区V型河谷地形地貌特征，根据地应力实测资料及地质构造条件，考虑边坡浅表全风化、强风化地层以及断层破碎带对坝区初始地应力场的影响，建立了坝区初始地应力场三维回归计算分析模型。通过多元回归三维数值计算，求得地应力最优回归系数，较为准确地反演了大岗山坝区的初始地应力场。计算结果表明，大岗山坝区初始地应力场是一个在浅部以构造应力为主、在深部以自重应力为主、由构造应力和自重应力联合组成的中等偏高的地应力场，研究结果为坝区边坡开挖及长期稳定性分析提供了重要依据。
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| 关 键 词： | 初始地应力场 应力回归分析 多元回归模型 数值分析 |
| 收稿时间： | 2007-11-23 |
Regression analysis of initial geostress field in dam zone of Dagangshan hydropower station |
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| ZHANG Jian-guo,ZHANG Qiang-yong,YANG Wen-dong,ZHANG Xin.Regression analysis of initial geostress field in dam zone of Dagangshan hydropower station[J].Rock and Soil Mechanics,2009,30(10):3071-3078. |
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| Authors: | ZHANG Jian-guo ZHANG Qiang-yong YANG Wen-dong ZHANG Xin |
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| Institution: | 1. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China; 2. Shandong Zhengyuan Construction Engineering Co., Ltd, Jinan 250101, China |
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| Abstract: | In view of the influence of completely and intensively weathered stratum in the shallow surface of slope and fault fracture belt on the initial geostress field in dam zone of Dagangshan hydropower station, the 3D initial geostress regression analysis model is established based on the measured geostress data and geologic structure as well as topography features of V-shaped river valley. The optimal geostress regression coefficients have been achieved through 3D multivariate regression numerical analysis and the initial geostress field in dam zone of Dagangshan hydropower station is exactly simulated. The calculation results show that the initial geostress field in dam zone is a medium to high stress field composed of tectonic stress and dead-weight stress. The tectonic stress is prominent at shallow level and the dead-weight stress is prominent at deep level, which provides important reference basis for excavating simulation and long-term stability analysis of slope. |
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| Keywords: | initial geostress field stress regression analysis multivariate regression model numerical analysis |
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