开挖岩体边坡卸荷带宽度的计算方法
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
卸荷带的判别与计算,直接关系到岩体边坡的长期稳定性及致灾安全性。针对均质岩体边坡,采用弹性理论楔形体力学模型,提出了开挖岩体边坡力学模型,建立了开挖岩体边坡应力的计算方法;从开挖高度、开挖坡度、台阶宽度、岩体粘聚力、内摩擦角及岩体容重等方面,通过敏感性分析,探讨了开挖岩体边坡卸荷带宽度的变化规律,据此采用量纲分析法,建立了开挖岩体边坡卸荷带宽度的计算公式。
The discrimination of unloading zones influent the long-term stability and safety of rock slopes.For homogenous rock slope,the unloading mechanics model of excavated rock slope is got based on elastic wedge theory.The method used for calculating the width of unloading zones is deduced.Some parameters that affect the width of unloading zones,such as height,angle and width of excavation,cohesive strength,friction angle and density of rock mass are discussed through sensitivity analysis.Finally a formula is established to calculate the width of unloading zones by using dimensional analysis method.
引文
[1]陈洪凯,唐红梅,叶四桥,等.危岩防治原理[M].北京:地震出版社,2006.Chen H K,Tang H M,Ye S Q,et al.PreventionPrinciple for Perilous Rock[M].Beijing:SeismologicalPress,2006.
    [2]侯智斌.东庄水利工程枢纽区砂岩页岩岩体卸荷特征[J].陕西水力发电,2000,16(3):4-9.Hou Z B.Load-off characteristics of sandy shale rockat the dam site of Dongzhuang Hydraulic Project[J].Journal of Shanxi Water Power,2000,16(3):4-9.
    [3]郑达,黄润秋.高边坡岩体卸荷带划分的量化研究[J].水文地质工程地质,2006,(5):9-12.Zheng D,Huang R Q.Quantitative study on theclassification of unloading zones of high slope[J].Hydro-geology&Engineering Geology,2006,(5):9-12.
    [4]赵晓彦,胡厚田,庞烈鑫,等.类土质边坡开挖的卸荷作用及卸荷带宽度的确定[J].岩石力学与工程学报,2005,24(4):708-712.Zhao X Y,Hu H T,Pang L X,et al.Study onunloading effect and width of ubloading zones inexcavating of soil-like material slopes[J].ChineseJournal of Rock Mechanics and Engineering,2005,24(4):708-712.
    [5]秦建彬,冯明权.彭水水电站主厂房下游边墙岩体卸荷松弛特征[J].人民长江,2007,38(9):91-93.Qin J B,Feng M Q.Research for unloading relaxationfeature of downstream side wall rock mass ofPengshui hydropower station[J].Yangtze River,2007,38(9):91-93.
    [6]李维树,童克强,董忠华.高边坡岩体卸荷带检测方法及卸荷特征研究[J].岩石力学与工程学报,2001,20(增):1669-1673.Li W S,Tong K Q,Dong Z H.Examining method ofunload zone and study of unload behaviour for highslope[J].Chinese Journal of Rock Mechanics andEngineering,2001,20(S):1669-1673.
    [7]任光明,巨广宏,聂德新,等.斜坡岩体卸荷分带量化研究[J].成都理工大学学报(自然科学版),2003,30(4):335-338.Ren G M,Ju G H,Nie D X,et al.A quantitative studyon the classification of unloading zones of rock massslope[J].Journal of Chengdu University ofTechnology(Science&Technology Edition),2003,30(4):335-338.
    [8]GB 50287-99,水力发电工程地质勘察规范[S].
    [9]徐芝纶.弹性力学简明教程[M].北京:高等教育出版社,2002.Xu Z L.A Concise Course in Elasticity[M].Beijing:Higher Education Press,2002.
    [10]高家美,顿志林.楔形体应力理论及其在工程中的应用[M].北京:煤炭工业出版社,2001.Gao J m,Dun Z L.Stress Theory of Wedge and ItsApplication[M].Beijing:China Coal IndustryPublishing House,2001.
    [11]Aubertin M,Li L,Simon R.A multi-axial stresscriterion for shout and long-term strength of isotropicrock media[J].International Journal of RockMechanics and Mining Sciences,2003,37(8):1169-1193.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心