| 局域地应力场获取的插值平衡方法 |
| |
| 引用本文： | 张传庆,周辉,冯夏庭,张振华,董绍尧.局域地应力场获取的插值平衡方法[J].岩土力学,2008,29(8):2016-2024. |
| |
| 作者姓名： | 张传庆 周辉 冯夏庭 张振华 董绍尧 |
| |
| 作者单位： | 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，武汉 430071； 2. 三峡大学 三峡库区地质灾害教育部重点实验室，湖北 宜昌 443002；3. 中国水电顾问集团 昆明勘测设计研究院，昆明 650051 |
| |
| 基金项目： | 国家自然科学基金
,
国家自然科学基金联合基金
,
中国科学院岩土力学研究所岩土力学与工程国家重点实验室开放研究基金资助项目 |
| |
| 摘 要： | 针对由整体地应场插值计算局域地应力场的问题计算量大、受地质结构的影响大、不过分追求高精度等特点，改进了反距离加权插值法，考虑了单元体积的影响，提高了该方法在此问题中的适用性。基于此，提出了平面问题、三维地面和地下工程局域地应力场的求取策略，建议了边界全平动约束和法向约束两种边界条件，并验证了其合理性和适用场合。最后，在大型水电工程深切河谷坝肩边坡分析中进行了应用分析。结果表明：该插值方法简单实用，能够满足工程分析的精度要求；局域地应力场的求取策略计算效率高，计算精度能够满足工程分析的要求。
|
| 关 键 词： | 地应力 反距离加权插值法 边界条件 局域应力场 边坡 隧洞 |
| 收稿时间： | 2007-09-05 |
Method for obtaining local stress field based on interpolation and numerical simulation method |
| |
| ZHANG Chuan-qing,ZHOU Hui,FENG Xia-ting,ZHANG Zhen-hua,DONG Shao-yao.Method for obtaining local stress field based on interpolation and numerical simulation method[J].Rock and Soil Mechanics,2008,29(8):2016-2024. |
| |
| Authors: | ZHANG Chuan-qing ZHOU Hui FENG Xia-ting ZHANG Zhen-hua DONG Shao-yao |
| |
| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Key Lab. of Geological Hazards on Three Gorges Reservoir of Ministry of Education, China Three Gorges University, Yichang 443002, China; 3. Kunming Investigation and Design Institute, China Hydropower Engineering Consulting Co., Kunming 650051, China |
| |
| Abstract: | It is a basic problem that obtainment of the local stress field from the large stress field. The usual methods consist of two steps including interpolation of stress field or boundary conditions and calculation of the local stress field once again. But the previous methods are too complex, high calculation cost or special for a class of problems to being applied. From the engineering angle of view, it is unessential for the high degree of accuracy as to stress field interpolation affected by the complicated geology construction. So, the improved IDW (inverse distance to a power) method which considers the volume effect is presented aiming to the above problems. Based on this method, the obtainment methods of local stress field, in which two kinds of boundary conditions are proposed, are presented for solving the corresponding plane problems, 3-D ground problems and 3-D underground problems. Their rationalities are verified through the settlement of several cases. Finally, the methods are applied to the stability analysis of high rock slope in Nuozhadu Hydropower Project. The results indicate that the improved IDW method is simple and practical; the corresponding solving methods for local stress field are efficient and of satisfied accuracy. |
| |
| Keywords: | in situ stress IDW(inverse distance to a power) boundary condition local stress field slope tunnel |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
