考虑侵蚀下切作用的深切河谷岩体地应力场回归

梁瑶; 赵刚; 杨涛

考虑侵蚀下切作用的深切河谷岩体地应力场回归

梁瑶¹,
赵刚²,
杨涛¹

详细信息

作者简介:
梁瑶(1982- ),女,博士研究生,研究方向为地应力场和边坡稳定性,电话:13880717055,E-mail:sclyyaoyao@yahoo.cn

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出版历程
- 收稿日期: 2008-07-14

Multi-regression Analysis of In-situ Stress Field in Deep River Valley

摘要

摘要: 针对深切河谷地区独特的地形条件,从影响地应力的因素入手,提出除自重、地质构造外,河谷的剥蚀下切和谷坡形态的发育、演化也是影响地应力场的重要因素.将初始地应力场视为由谷坡下切改造后的自重应力场和构造应力场组成,采用回归分析的方法确定河谷地区的地应力场.计算结果表明,考虑河谷的发育和演化史,分步模拟谷坡剥蚀下切得到的岩体应力状态与实测数据更为接近,呈现出谷坡浅表部应力松弛卸荷和谷底应力集中的分布规律.
- 深切河谷 /
- 地应力 /
- 多元回归
Abstract: Based on the geological characteristics of deep river valleys,factors inflencing in-situ stress fields were analyzed.It was strongly believed that valley development is an important factor affecting in-situ stress fields besides self-weight and geological structures.An in-situ stress field was simulated by the multi-regression method and thought to be the sum of a self-weight stress field affected by river valley development and a tectonic stress field.The research result shows that the regressed stresses considering the development and evolution of a deep river valley by steps are close to the measured ones,and the regressed stress field characterizes a relaxation at the shallow surface of a deep river valley and a concentration at its bottom.
- deep river valley /
- in-situ stress /
- multi-regression method

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参考文献(1)

FAIRHURST C.Stress estimation in rock:A brief history and review[J].International Journal of Rock Mechanics and Mining Sciences,2003,40:957-973.[2] 陶振宇.对岩体初始应力的初步认识[J].水文地质工程地质,1980(2):12-17.[3] GOODMAN R E.Introduction to rock mechanics[M].2nd ed.New York:Wiley,1989:345-347.[4] 邱祥波,李术才,李树忱.三维地应力回归分析方法与工程应用[J].岩石力学与工程学报,2003,22(10):1613-1617.QIU Xiangbo,LI Shucai,LI Shuchen.3D geostress regression analysis method and its application[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(10):1613-1617.[5] 李青麒.初始应力的回归与三维拟合[J].岩土工程学报,1998,20(5):68-71.LI Qingqi.Regression analysis and 3-D fitting of initial stress[J].Chinese Journal of Geotechnical Engineering,1998,20(5):68-71.[6] 戚蓝,丁志宏,马斌,等.初始地应力场多方程回归分析[J].岩土力学,2003,24(增刊1):137-139.QI Lan,DING Zhihong,MA Bin,et al.Egression analysis of initial in-situ stress field with multiple variables and equations[J].Rock Mechanics and Rock Engineering,2003,24(Sup.1):137-139.[7] 李宏,安其美,王海忠,等.V型河谷区原地应力测量研究[J].岩石力学与工程学报,2006,25(增刊1):3069-3074.LI Hong,AN Qimei,WANG Haizhong,et al.Study on in-situ stress measurement in V-shaped river valley[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Sup.1):3069-3074.[8] 徐则民,黄润秋,陈颖辉,等.河谷应力集中及岩体响应[J].工程勘察,2003(1):4-7.XU Zemin,HUANG Runqiu,CHEN Yinhui,et al.Stress concentration of river valleys and the response of rockmass[J].Geotechnical Investigation and Surveying,2003(1):4-7.

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文章访问数: 1289
HTML全文浏览量: 78
PDF下载量: 40
被引次数: 0