力矩效应对顺层岩质边坡稳定性的影响
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摘要
考虑了力矩效应的存在对顺层岩质边坡稳定性的影响。当存在力矩效应时,剪切面上的剪应力和正应力不是均匀分布的,在剪切过程中存在一个调整过程,并在局部集中。当力矩效应较弱时,结构面上的应力可视为均匀分布;随着力矩效应的增大,正应力和剪应力都增大,出现非均匀分布,在局部表现为应力集中,并且出现局部破坏,而在整体上表现为力矩平衡和受力平衡。当剪切力大于抗剪强度时,则宏观上出现边坡失稳。同时根据应力集中部位的不同划分了不同的边坡破坏形式。
The model of moment of force was introduced to the bedding rock slop stability,and the instability process was analyzed.When the force moment exists,the shear stress and the support stress are not the even distribution.There is a process alignment procedure in cuts.The stress concentrate in some part cause the existence of shearing moment.Along with increasing of force moment,the supports stress and the shear stress all increase.The non-uniform distribution appears.The stress is concentrated partially,and the rock slope appears partial failure.When the shear force is bigger than the shear strength,the macroscopic instability appears.It is also divided the different modes of slope instability based on stress concentrated zone.
The model of moment of force was introduced to the bedding rock slop stability,and the instability process was analyzed.When the force moment exists,the shear stress and the support stress are not the even distribution.There is a process alignment procedure in cuts.The stress concentrate in some part cause the existence of shearing moment.Along with increasing of force moment,the supports stress and the shear stress all increase.The non-uniform distribution appears.The stress is concentrated partially,and the rock slope appears partial failure.When the shear force is bigger than the shear strength,the macroscopic instability appears.It is also divided the different modes of slope instability based on stress concentrated zone.
引文
[1]胡启军.长大顺层边坡渐近失稳机理及首段滑移长度确定的研究[D].成都:西南交通大学,2008.
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[11]王来贵,黄润秋,王泳嘉,等.岩石力学系统运动稳定性理论及其应用[M].北京:地质出版社,1998.
[12]黄润秋,许强.工程地质广义系统科学分析原理及应用[M].北京:地质出版社,1997.
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[14]黄志全,张长存,姜彤,等.滑坡预报得协同-分岔模型及其应用[J].岩石力学与工程学报,2002,21(4):498-501.Huang Zhiquan,Zhang Changcun,Jiang Tong,et al.Synergetic-bi-furcated model of landslide prediction and its application[J].Chi-nese Journal of Rock Mechanics and Engineering,2002,21(4):498-501.
[15]Byerlee J D.Friction of rocks[J].Pure and Applied Geophysics,1978,166(4/5):615-626.
[16]Byerlee J D.The mechanics of stick-slip[J].Techonophsics,1970(9):475-486.
[17]邱泽华,张宝红.用力矩模型解释摩擦试验加载过程中的非线性变化[J].岩石力学与工程学报,2004,23(2):252-255.Qiu Zehua,Zhang Baohong.Theoretic studies on nonlinearity inloading process of frictional experiments with moment considered[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(2):252-255.
[18]徐嘉谟.黏聚力作用在块体稳定性分析中的意义,工程地质力学研究[M].北京:地质出版社,1985.
[19]贺可强,阳吉宝,李显忠.堆积层滑坡预测预报及其防治[M].北京:地震出版社,1996.
[2]黄润秋,张倬元,王士天.黄河拉西瓦水电站高边坡稳定性的系统工程地质研究[M].成都:成都科技大学出版社,1997.
[3]庆祖荫.半岩性土高速滑坡形成机制及龙羊峡库岸滑坡评价,中国典型滑坡[M].北京:科学出版社,1988.
[4]张年学,盛祝平,孙广忠,等.长江三峡工程库区顺层岸坡研究[M].北京:地质出版社,1993.
[5]郭志.实用岩体力学[M].北京:地质出版社,1996.
[6]王代华,刘军,柏德强,等.露天边坡在爆破作用下损伤特征的试验研究[J].煤炭学报,2004,29(5):532-535.Wang Daihua,Liu Jun,Bai Deqiang,et al.Experimental study on thedamage characteristics of the slope under blasting[J].Journal ofChina Coal Society,2004,29(5):532-535.
[7]陈有亮.岩体高边坡滑移与失稳的力学分析[J].煤炭学报,2000,25(6):598-601.Chen Youliang.Mechanical analysis of slipping of rock slope[J].Journal of China Coal Society,2000,25(6):598-601.
[8]宋克志.边坡位移时间关系模拟的人工神经网络模型[J].煤炭学报,2004,29(4):405-408.Song Kezhi.Aartifical neural network model on relationship betweenslope displacements and time[J].Journal of China Coal Society,2004,29(4):405-408.
[9]何习平,华锡生,何秀凤,等.崩塌堆积体变形分形分区研究[J].煤炭学报,2007,32(7):691-694.He Xiping,Hua Xisheng,He Xiufeng,et al.Deformation partition onthe collapsed accumulation body by fractal theory[J].Journal ofChina Coal Society,2007,32(7):691-694.
[10]林杭,曹平,李江腾,等.边坡临界失稳状态的判定标准[J].煤炭学报,2008,33(6):643-646.Lin Hang,Cao Ping,Li Jiangteng,et al.The standards for criticalfailure state of slope[J].Journal of China Coal Society,2008,33(6):643-646.
[11]王来贵,黄润秋,王泳嘉,等.岩石力学系统运动稳定性理论及其应用[M].北京:地质出版社,1998.
[12]黄润秋,许强.工程地质广义系统科学分析原理及应用[M].北京:地质出版社,1997.
[13]秦四清.斜坡失稳的突变模型与混沌机制[J].岩土工程学报,2000,19(4):486-492.Qin Siqing.Nonlinear catastrophy model of slope instability andchaotic dynamics mechanism of slope evolution process[J].Chi-nese Journal of Rock Mechanics and Engineering,2000,19(4):486-492.
[14]黄志全,张长存,姜彤,等.滑坡预报得协同-分岔模型及其应用[J].岩石力学与工程学报,2002,21(4):498-501.Huang Zhiquan,Zhang Changcun,Jiang Tong,et al.Synergetic-bi-furcated model of landslide prediction and its application[J].Chi-nese Journal of Rock Mechanics and Engineering,2002,21(4):498-501.
[15]Byerlee J D.Friction of rocks[J].Pure and Applied Geophysics,1978,166(4/5):615-626.
[16]Byerlee J D.The mechanics of stick-slip[J].Techonophsics,1970(9):475-486.
[17]邱泽华,张宝红.用力矩模型解释摩擦试验加载过程中的非线性变化[J].岩石力学与工程学报,2004,23(2):252-255.Qiu Zehua,Zhang Baohong.Theoretic studies on nonlinearity inloading process of frictional experiments with moment considered[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(2):252-255.
[18]徐嘉谟.黏聚力作用在块体稳定性分析中的意义,工程地质力学研究[M].北京:地质出版社,1985.
[19]贺可强,阳吉宝,李显忠.堆积层滑坡预测预报及其防治[M].北京:地震出版社,1996.
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