顺倾岩质高边坡开挖变形机理及计算
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摘要
为了进一步分析顺倾岩质高边坡开挖变形机理及变形计算方法,以卸荷岩体力学及弹性力学理论为基础,对顺层岩质边坡开挖前后边坡岩体的力学状态进行了分析,对边坡变形机理及变形计算方法进行了研究.研究结果表明,顺倾岩质边坡在开挖过程中岩体受力状态发生改变,岩体力学参数劣化,造成边坡发生较大变形;顺层岩质边坡变形主要由浅表松弛变形、卸荷回弹变形及顺层滑移变形组成.并以弹性力学为基础提出了边坡卸荷回弹变形的计算方法,依据能量守恒定律推导了顺层滑移变形的计算方法.
In order to analyze the deformation mechanism and deformation computing method,based on unloading rock mass mechanics and elastic mechanics,through the slope stress state analyze of initial and unloading,the deformation mechanism and deformation computing method of layered dip rocky slope are studied.The results show that with excavation,the stress state of slope is changed,the mechanic parameters of rock mass is depredated and the deformation is occurred.The deformation types of layered dip rocky slope are relaxation deformation,rebound deformation and slippage deformation.Based on elastic mechanics,the rebound deformation calculation method is proposed.According to law of conservation of energy,the slippage deformation calculation method is proposed.
In order to analyze the deformation mechanism and deformation computing method,based on unloading rock mass mechanics and elastic mechanics,through the slope stress state analyze of initial and unloading,the deformation mechanism and deformation computing method of layered dip rocky slope are studied.The results show that with excavation,the stress state of slope is changed,the mechanic parameters of rock mass is depredated and the deformation is occurred.The deformation types of layered dip rocky slope are relaxation deformation,rebound deformation and slippage deformation.Based on elastic mechanics,the rebound deformation calculation method is proposed.According to law of conservation of energy,the slippage deformation calculation method is proposed.
引文
[1]哈秋舲.岩体工程与岩体力学仿真分析:各项异性开挖卸荷岩土力学研究[J].岩土工程学报,2001,23(6):664-668.HA Qiu-ling.Simulation analysis for rock mass engi-neering and rock mass mechanics:the study on aniso-tropic excavation unloading rock mass mechanics[J].Chinese Journal of Geotechnical Engineering,2001,23(6):664-668.
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[4]朱继梁,黄润秋,张诗媛.某水电站进水口高边坡的变形响应研究[J].岩土力学,2010,31(2):593-598.ZHU Ji-liang,HUANG Run-qiu,ZHANG Shi-yuan.Study of deformation response of a high rock slopeexcavation at an intake for a large hydropower station[J].Rock and Soil Mechanic,2010,31(2):593-598.
[5]冯学敏,陈胜宏,李文纲.岩石高边坡开挖卸荷松弛准则研究与工程应用[J].岩土力学,2009,30(2):452-456.FENG Xue-min,CHEN Sheng-hong,LI Wen-gang.Research on unloading relaxation criterion of high rocky slope excavation and its engineering application[J].Rock and Soil Mechanic,2009,30(2):452-456.
[6]肖克强,周德培,李海波.软岩高边坡开挖变形规律的物理模拟研究[J].岩土力学,2007,28(1):111-115.XIAO Ke-qiang,ZHOU De-pei,LI Hai-bo.Physical modeling of deformation properties for soft rock slope under excavation[J].Rock and Soil Mechanic,2007,28(1):111-115.
[7]肖克强.地震荷载作用下顺倾岩体边坡变形特征及稳定性计算[D].武汉:中国科学院武汉岩土力学研究所,2006.XIAO Ke-qiang.Study on deformation characteris-tics and stability of bedding slope under earthquakes[D].Wuhan:Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,2006.
[8]曹卫文.顺层岩体边坡开挖过程模型试验[D].重庆:重庆交通大学,2009:18-22.CAO Wei-wen.The excavation model experiment of bedding rock slope[D].Chongqing:Chongqing Jiao-tong University,2009:18-22.
[9]冯君,周德培,李安洪.顺层岩质边坡开挖松弛区实验研究[J].岩石力学与工程学报,2005,24(5):840-845.FENG Jun,ZHOU De-pei,LI An-hong.Physicalmodeling research on relaxation region of consequent rock slope induced by road cutting[J].Chinese Jour-nal of Rock Mechanics and Engineering,2005,24(5):840-845.
[10]冯君,周德培,李安洪.顺层岩质边坡开挖稳定性研究[J].岩石力学与工程学报,2005,24(9):1474-1478.FENG Jun,ZHOU De-pei,LI An-hong.Research on relaxation stability of consequent rock slopes[J].Chinese Journal of Rock Mechanics and Engineer-ing,2005,24(9):1474-1478.
[11]梁霄,李振存.基于卸荷岩体力学的顺倾岩质边坡开挖变形数值模拟[J].公路与汽运,2011,24(9):129-132.LIANG Xiao,LI Zhen-cun.Excavation deformation numerical simulation of consequent rock slope based on unloading rock mass mechanics[J].Highways and Automotive Applications,2011,24(9):129-132.
[12]李振存.水力作用下顺倾岩质边坡稳定性及开挖变形研究[D].长沙:长沙理工大学,2011.LI Zhen-cun.Research on the stability and excava-ting deformation of consequent bedding rock slope under the hydraulic action[D].Changsha:Changsha University of Science and Technology,2011.
[13]冯文娟,琚晓东,邹正盛.地下洞室开挖卸荷围岩稳定性研究[J].路基工程,2009(4):62-63.FENG Wen-juan,JU Xiao-dong,ZOU Zheng-sheng.Study on stability of underground cavern under ex-cavation unloading[J].Subgrade Engineering,2009(4):62-63.
[2]易庆林,邓华峰,王乐华.某公路边坡开挖卸荷变形研究[J].地下空间与工程学报,2009,5(1):139-143.YI Qing-lin,DENG Hua-feng,WANG Le-hua.Study on unloading deformation of one highway slope[J].Chinese Journal of Underground Space and Engineer-ing,2009,5(1):139-143.
[3]邓华峰,李建林,易庆林,等.软岩高边坡开挖卸荷变形研究[J].岩土力学,2009,30(6):1731-1734.DENG Hua-feng,LI Jian-lin,YI Qing-lin,et al.Re-search on unloading deformation of soft high slop[J].Rock and Soil Mechanics,2009,30(6):1731-1734.
[4]朱继梁,黄润秋,张诗媛.某水电站进水口高边坡的变形响应研究[J].岩土力学,2010,31(2):593-598.ZHU Ji-liang,HUANG Run-qiu,ZHANG Shi-yuan.Study of deformation response of a high rock slopeexcavation at an intake for a large hydropower station[J].Rock and Soil Mechanic,2010,31(2):593-598.
[5]冯学敏,陈胜宏,李文纲.岩石高边坡开挖卸荷松弛准则研究与工程应用[J].岩土力学,2009,30(2):452-456.FENG Xue-min,CHEN Sheng-hong,LI Wen-gang.Research on unloading relaxation criterion of high rocky slope excavation and its engineering application[J].Rock and Soil Mechanic,2009,30(2):452-456.
[6]肖克强,周德培,李海波.软岩高边坡开挖变形规律的物理模拟研究[J].岩土力学,2007,28(1):111-115.XIAO Ke-qiang,ZHOU De-pei,LI Hai-bo.Physical modeling of deformation properties for soft rock slope under excavation[J].Rock and Soil Mechanic,2007,28(1):111-115.
[7]肖克强.地震荷载作用下顺倾岩体边坡变形特征及稳定性计算[D].武汉:中国科学院武汉岩土力学研究所,2006.XIAO Ke-qiang.Study on deformation characteris-tics and stability of bedding slope under earthquakes[D].Wuhan:Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,2006.
[8]曹卫文.顺层岩体边坡开挖过程模型试验[D].重庆:重庆交通大学,2009:18-22.CAO Wei-wen.The excavation model experiment of bedding rock slope[D].Chongqing:Chongqing Jiao-tong University,2009:18-22.
[9]冯君,周德培,李安洪.顺层岩质边坡开挖松弛区实验研究[J].岩石力学与工程学报,2005,24(5):840-845.FENG Jun,ZHOU De-pei,LI An-hong.Physicalmodeling research on relaxation region of consequent rock slope induced by road cutting[J].Chinese Jour-nal of Rock Mechanics and Engineering,2005,24(5):840-845.
[10]冯君,周德培,李安洪.顺层岩质边坡开挖稳定性研究[J].岩石力学与工程学报,2005,24(9):1474-1478.FENG Jun,ZHOU De-pei,LI An-hong.Research on relaxation stability of consequent rock slopes[J].Chinese Journal of Rock Mechanics and Engineer-ing,2005,24(9):1474-1478.
[11]梁霄,李振存.基于卸荷岩体力学的顺倾岩质边坡开挖变形数值模拟[J].公路与汽运,2011,24(9):129-132.LIANG Xiao,LI Zhen-cun.Excavation deformation numerical simulation of consequent rock slope based on unloading rock mass mechanics[J].Highways and Automotive Applications,2011,24(9):129-132.
[12]李振存.水力作用下顺倾岩质边坡稳定性及开挖变形研究[D].长沙:长沙理工大学,2011.LI Zhen-cun.Research on the stability and excava-ting deformation of consequent bedding rock slope under the hydraulic action[D].Changsha:Changsha University of Science and Technology,2011.
[13]冯文娟,琚晓东,邹正盛.地下洞室开挖卸荷围岩稳定性研究[J].路基工程,2009(4):62-63.FENG Wen-juan,JU Xiao-dong,ZOU Zheng-sheng.Study on stability of underground cavern under ex-cavation unloading[J].Subgrade Engineering,2009(4):62-63.
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