不同约束层状边坡岩体结构稳定性位移判据
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摘要
针对层状边坡岩体结构的变形特点,概括出实际边坡工程中常见的破坏形式,抽象出不同约束条件下岩梁结构简化分析模型。利用后屈曲能量准则建立的平衡稳定模态幅值方程,进一步研究结构分叉后平衡路径的演化途径,给出以边坡上部滑动位移、剪切滑动的极限长度等为控制变量的边坡溃屈和剪切滑动的位移判据,真实反映了层状边坡岩体结构屈曲和后屈曲的实际变形和整体破坏过程。结合工程现场有效的量测手段,可方便、有效的判定层状岩质边坡的稳定性,补充了已有的岩体结构稳定性位移判据理论。
According to deformed specificities for rock mass bedding slope,the common failure forms in slope engineering are summarized,the rock beam structure model under various restriction in engineering locale are extract.Based on the modality amplitude equation of equilibrium stability built on post-buckling energy criterion,the regions nearby equilibrium bifurcation point and evolutions along equilibrium path are studied,the buckling and the shearing slip displacement criteria in the form of the upper bound slipping displacement and the ultimate length with shearing slip are given,reflecting the post-buckling deformation and failure of structure rock mass.The displacement criteria given in the paper and the available measure method in engineering locale are used to predict the stability of the rock slope,supplementing the stability displacement criteria.
According to deformed specificities for rock mass bedding slope,the common failure forms in slope engineering are summarized,the rock beam structure model under various restriction in engineering locale are extract.Based on the modality amplitude equation of equilibrium stability built on post-buckling energy criterion,the regions nearby equilibrium bifurcation point and evolutions along equilibrium path are studied,the buckling and the shearing slip displacement criteria in the form of the upper bound slipping displacement and the ultimate length with shearing slip are given,reflecting the post-buckling deformation and failure of structure rock mass.The displacement criteria given in the paper and the available measure method in engineering locale are used to predict the stability of the rock slope,supplementing the stability displacement criteria.
引文
[1]孙广忠.工程地质与地质工程[M].北京:地震出版社,1993.SUN Guang-zhong,Engineering geology and geological engineering[M].Beijing:Earthquake Press,1993.
[2]李云鹏,杨治林,王芝银,等.顺层边坡岩体结构稳定性位移理论[J].岩石力学与工程学报,2000,19(6):747-750.LI Yun-peng,YANG Zhi-lin,WANG Zhi-yin,et al.Displacement theory of structure stability for rock mass bedding slope[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(6):747-750.
[3]黄润秋,赵建军,巨能樊,等.汤屯高速公路顺层岩质边坡变形机制分析及治理对策研究[J].岩石力学与工程学报,2007,26(2):239-246.HUANG Run-qiu,ZHAO Jian-jun,JU Neng-fan et al.Study on deformation mechanism and control method of bedding rockslope along Tangtun expressway[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(2):239-246.
[4]WANG Zhi-yin,YANG Zhi-fang,LI Yun-peng.Research on displacement criterion of structural deforamation and failure forbeddong rock slope[J].Scienia Geologica Sinica,1998,7(2):217-223.
[5]王芝银,杨志法,李云鹏,等.顺层边坡岩体结构变形分叉突变特性研究[J].西安矿业学院学报,1999,19(3):203-207.WANG Zhi-yin,YANG Zhi-fang,LI Yun-peng,et al.On bifurcate catastrophic behavior of structural deformation for beddingrock slope[J].Journal of Xi′an Ming Institute,1999,19(3):203-207.
[6]肖远.用岩层梁代替岩层板分析顺层岩体边坡结构变形破坏的条件[C].//第二届全国工程地质力学青年学术讨论会论文集.北京:地震出版社,1992:78-83.XIAO Yuan.Conditions replaced rock plate by rock beam for structural deformation and failure of bedding rock slope[C].//In:Proceedings of the 2ndNational Youth Academical Conference on Engineering Geology Mechanics.Beijing:EarthquakePress,1992:78-83.
[7]范饮珊.初始后屈曲理论及其应用[C].//中国力学学会办公室.材料和结构的不稳定性.北京:科学出版社,1993.FAN Qin-shan.Theory of initial post-buckling and its applications in engineering[C].//CSTAM.Unstability of Materialand Structure.Beijing:Science Press,1993.
[8]WANG Zhi-yin,LI Yun-peng,YANG Zhi-fa.Numerical simulation of the geomechanical processes in rock engineering[J].Rock Mechanics and Mining Sciences,2000,(37):499-507.
[9]胡广韬.滑坡动力学[M].北京:地质出版社,1995.HU Guang-tao.Slippery dynamics[M].Beijing:Geology Press,1993.
[2]李云鹏,杨治林,王芝银,等.顺层边坡岩体结构稳定性位移理论[J].岩石力学与工程学报,2000,19(6):747-750.LI Yun-peng,YANG Zhi-lin,WANG Zhi-yin,et al.Displacement theory of structure stability for rock mass bedding slope[J].Chinese Journal of Rock Mechanics and Engineering,2000,19(6):747-750.
[3]黄润秋,赵建军,巨能樊,等.汤屯高速公路顺层岩质边坡变形机制分析及治理对策研究[J].岩石力学与工程学报,2007,26(2):239-246.HUANG Run-qiu,ZHAO Jian-jun,JU Neng-fan et al.Study on deformation mechanism and control method of bedding rockslope along Tangtun expressway[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(2):239-246.
[4]WANG Zhi-yin,YANG Zhi-fang,LI Yun-peng.Research on displacement criterion of structural deforamation and failure forbeddong rock slope[J].Scienia Geologica Sinica,1998,7(2):217-223.
[5]王芝银,杨志法,李云鹏,等.顺层边坡岩体结构变形分叉突变特性研究[J].西安矿业学院学报,1999,19(3):203-207.WANG Zhi-yin,YANG Zhi-fang,LI Yun-peng,et al.On bifurcate catastrophic behavior of structural deformation for beddingrock slope[J].Journal of Xi′an Ming Institute,1999,19(3):203-207.
[6]肖远.用岩层梁代替岩层板分析顺层岩体边坡结构变形破坏的条件[C].//第二届全国工程地质力学青年学术讨论会论文集.北京:地震出版社,1992:78-83.XIAO Yuan.Conditions replaced rock plate by rock beam for structural deformation and failure of bedding rock slope[C].//In:Proceedings of the 2ndNational Youth Academical Conference on Engineering Geology Mechanics.Beijing:EarthquakePress,1992:78-83.
[7]范饮珊.初始后屈曲理论及其应用[C].//中国力学学会办公室.材料和结构的不稳定性.北京:科学出版社,1993.FAN Qin-shan.Theory of initial post-buckling and its applications in engineering[C].//CSTAM.Unstability of Materialand Structure.Beijing:Science Press,1993.
[8]WANG Zhi-yin,LI Yun-peng,YANG Zhi-fa.Numerical simulation of the geomechanical processes in rock engineering[J].Rock Mechanics and Mining Sciences,2000,(37):499-507.
[9]胡广韬.滑坡动力学[M].北京:地质出版社,1995.HU Guang-tao.Slippery dynamics[M].Beijing:Geology Press,1993.
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