边坡动态施工的有限元模拟与稳定性评价
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摘要
采取弹塑性有限元程序,在考虑施工爆破、岩体节理影响的条件下,对常张高速公路重点边坡的施工过程进行了模拟,分析了开挖过程中,岩体的变形和应力状态及屈服状态,并用降低材料强度储备的有限元强度折减法,根据边坡岩体单元的屈服连通程度和关键部位的位移变化对高边坡的整体安全系数进行了研究。通过对重点边坡K123的分析表明,边坡在其施工过程中是稳定的。
The simulation of stage excavation for the high slope of ChangZhang highway is carried out by using two-dimensional elastoplastic finite element method with consideration of the influence of blasting and rock joint.The rock mass deformation,stresses and yielding state in the excavation process are analyzed respectively.The integral safety of the high slope is discussed by using the method of lowering the material's strength safety factor and in light of the yielding rate of the slope's rock mass element and variation of displacements of the key parts.After the research of important slope K123, a conclusion can be drawn that the slopes would be stable in construction process.
The simulation of stage excavation for the high slope of ChangZhang highway is carried out by using two-dimensional elastoplastic finite element method with consideration of the influence of blasting and rock joint.The rock mass deformation,stresses and yielding state in the excavation process are analyzed respectively.The integral safety of the high slope is discussed by using the method of lowering the material's strength safety factor and in light of the yielding rate of the slope's rock mass element and variation of displacements of the key parts.After the research of important slope K123, a conclusion can be drawn that the slopes would be stable in construction process.
引文
[1]胡逸夫,曹平.常张高速公路风化岩边坡稳定性评判和工程关键技术研究可行性报告[R].长沙:中南大学资源与安全工程学院,2003.(Hu Yifu,Cao Ping.Feasibility Report of Evaluation on the Stability ofWeathered Rock Slope,at Changzhang Express way andStudy on Key Technology of the Project[R].Changsha:Central South University esource and Safety EngineeringInstitute,2003.(in Chinese))
[2]孙钧,汪炳鑑.地下结构有限元法解析[M].上海:同济大学出版社,1988,6.(Sun Jun,Wang Bingjian.FEM Analysis of Underground Structures[M].Shang-hai:Tongji University Press,1988,6.(in Chinese))
[3]于学馥,郑颖人等.地下工程围岩稳定分析[M].北京:煤炭工业出版社,1983.(Yu Xuefu,Zheng Yingrenet al.Analysis on Stability of Surrounding Rock of Un-derground Project[M].Beijing:Coal Industry Press,1983.(in Chinese))
[4]张季如.边坡开挖的有限元模拟和稳定性评价[J].岩石力学与工程学报,2002,6:843-847.(Zhang Ji-ru.FE Simulation and Stability Evaluation for Slope Ex-cavation[J].Chinese Journal of Rock Mechanics andEngineering,2002,6:843-847.(in Chinese))
[5]杜成斌,黄承泉等.百色水电站高边坡开挖模拟及稳定性分析[J].中国农村水利水电,2002,3:49-52.(Du Chengbin,Huang Chengquan et al.ExcavationSimulation and Stability Analysis of High Slope of BaiseHydro power Station[J].China Rural Water Conservan-cy and Power,2002,3:49-52.(in Chinese))
[6]黎剑华,张龙等.爆破地震波作用下的边坡失稳机理与临界振速[J].矿冶,2001,3:11-15.(Li Jianhua,Zhang Long et al.Mechanism of Stability Failure andCritical Vibration Speed of the Slope under BlastingSeismic Wave[J].Mine and Metallurgy,2001,3:11-15.(in Chinese))
[7]赵尚毅,郑颖人,时卫民等.用有限元强度折减法求边坡稳定性安全系数[J].岩土工程学报,2002,24(3):343-346.(Zhao Shangyi,Zheng Xingren,ShiWeimin et al.Determination of Safety Factors for SlopeStability by FE Strength Reduction Method[J].Journalof Rock Engineering,2002,24(3):343-346.(in Chi-nese))
[8]连镇营,韩国城,孔宪京.强度折减有限单元法研究开挖边坡的稳定性[J].岩土工程学报,2001,23(4):406-411.(Lian Zhengying,Han Guocheng,KongXianjing.Study on Stability of the Slope Excavation byStrength Reduction Finite Element Method[J].Journalof Rock Engineering,2001,23(4):406-411.(inChinese))
[9]陈秋南,张永兴,刘新荣,包太.连拱隧道的设计理论与动态施工力学研究[J].地下空间与工程学报,2005,(1):156-160.(Chen Qiunan,Zhang Yongxing,Liu Xinrong,et al.Research on Design Theory and Dy-namic Construction Mechanics for Double-arch HighwayTunnel[J].Chinese Journal of Underground Space andEngineering,2005,(1):156-160.(in Chinese))
[10]李永靖,张向东.城市地铁开挖对地表建筑物影响研究[J].地下空间与工程学报,2006,(8),1326-1329.(Li Yongjiang,Zhang Xiangdong.Research onInfluence of City Subway Excavating on the SurfaceBuilding[J].Chinese Journal of Underground Space andEngineering,2006,(8):1326-1329.(in Chinese))
[2]孙钧,汪炳鑑.地下结构有限元法解析[M].上海:同济大学出版社,1988,6.(Sun Jun,Wang Bingjian.FEM Analysis of Underground Structures[M].Shang-hai:Tongji University Press,1988,6.(in Chinese))
[3]于学馥,郑颖人等.地下工程围岩稳定分析[M].北京:煤炭工业出版社,1983.(Yu Xuefu,Zheng Yingrenet al.Analysis on Stability of Surrounding Rock of Un-derground Project[M].Beijing:Coal Industry Press,1983.(in Chinese))
[4]张季如.边坡开挖的有限元模拟和稳定性评价[J].岩石力学与工程学报,2002,6:843-847.(Zhang Ji-ru.FE Simulation and Stability Evaluation for Slope Ex-cavation[J].Chinese Journal of Rock Mechanics andEngineering,2002,6:843-847.(in Chinese))
[5]杜成斌,黄承泉等.百色水电站高边坡开挖模拟及稳定性分析[J].中国农村水利水电,2002,3:49-52.(Du Chengbin,Huang Chengquan et al.ExcavationSimulation and Stability Analysis of High Slope of BaiseHydro power Station[J].China Rural Water Conservan-cy and Power,2002,3:49-52.(in Chinese))
[6]黎剑华,张龙等.爆破地震波作用下的边坡失稳机理与临界振速[J].矿冶,2001,3:11-15.(Li Jianhua,Zhang Long et al.Mechanism of Stability Failure andCritical Vibration Speed of the Slope under BlastingSeismic Wave[J].Mine and Metallurgy,2001,3:11-15.(in Chinese))
[7]赵尚毅,郑颖人,时卫民等.用有限元强度折减法求边坡稳定性安全系数[J].岩土工程学报,2002,24(3):343-346.(Zhao Shangyi,Zheng Xingren,ShiWeimin et al.Determination of Safety Factors for SlopeStability by FE Strength Reduction Method[J].Journalof Rock Engineering,2002,24(3):343-346.(in Chi-nese))
[8]连镇营,韩国城,孔宪京.强度折减有限单元法研究开挖边坡的稳定性[J].岩土工程学报,2001,23(4):406-411.(Lian Zhengying,Han Guocheng,KongXianjing.Study on Stability of the Slope Excavation byStrength Reduction Finite Element Method[J].Journalof Rock Engineering,2001,23(4):406-411.(inChinese))
[9]陈秋南,张永兴,刘新荣,包太.连拱隧道的设计理论与动态施工力学研究[J].地下空间与工程学报,2005,(1):156-160.(Chen Qiunan,Zhang Yongxing,Liu Xinrong,et al.Research on Design Theory and Dy-namic Construction Mechanics for Double-arch HighwayTunnel[J].Chinese Journal of Underground Space andEngineering,2005,(1):156-160.(in Chinese))
[10]李永靖,张向东.城市地铁开挖对地表建筑物影响研究[J].地下空间与工程学报,2006,(8),1326-1329.(Li Yongjiang,Zhang Xiangdong.Research onInfluence of City Subway Excavating on the SurfaceBuilding[J].Chinese Journal of Underground Space andEngineering,2006,(8):1326-1329.(in Chinese))
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