地下洞室地震动态响应规律的影响因素分析
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摘要
对含节理岩体地下洞室动态响应分析是一个非常复杂的问题,目前研究尚处于探索阶段,基于此应用离散元软件UDEC初步分析了地震荷载作用下,节理倾角、地应力特征以及地震波振幅、频率等因素对含节理岩体地下洞室动态响应的规律。分析结果表明:地震荷载作用下,拱顶位移在节理倾角小于45°时随倾角的增加而增加,大于45°时随倾角的增加而减小,而拱肩均在倾角为60°时位移最大。洞室各验算点位移均随侧压力系数的增加而减小,随地震波振幅的增加而增大。分析结果还表明在低频部分验算点位移随频率的增加而增大,在高频部分随频率的增加而减小。研究思路及结果对含节理岩体地下洞室围岩变形和破坏机制以及抗震工程设计具有指导意义。
The dynamic response analysis of underground cavern with jointed rock is a very complex issue,the current research is still at the exploratory stage.Based on the application of discrete element software UDEC a preliminary analysis was carried out on the dynamic response law of the joint angle,the stress characteristics and the seismic wave amplitude,frequency and other factors to the underground cavern containing jointed rock under seismic loads.The results show that: under the earthquake loads,the arch displacement increases with increasing inclination angle in case of inclination angle less than 45° and decreases when the angle greater than 45°,while the spandrel had the largest displacement at the inclination of 60°.The displacement of checking points in chamber decreases with an increase in lateral pressure coefficient,and increases with the increase of shock wave amplitude.The results also show that in low-frequency part,the displacement of checking point increases with increasing frequency and in the high-frequency section decreases with increasing frequency.These research ideas and results can serve as guide for rock deformation and failure mechanisms of the jointed rock underground cavern,and seismic engineering design as well.
The dynamic response analysis of underground cavern with jointed rock is a very complex issue,the current research is still at the exploratory stage.Based on the application of discrete element software UDEC a preliminary analysis was carried out on the dynamic response law of the joint angle,the stress characteristics and the seismic wave amplitude,frequency and other factors to the underground cavern containing jointed rock under seismic loads.The results show that: under the earthquake loads,the arch displacement increases with increasing inclination angle in case of inclination angle less than 45° and decreases when the angle greater than 45°,while the spandrel had the largest displacement at the inclination of 60°.The displacement of checking points in chamber decreases with an increase in lateral pressure coefficient,and increases with the increase of shock wave amplitude.The results also show that in low-frequency part,the displacement of checking point increases with increasing frequency and in the high-frequency section decreases with increasing frequency.These research ideas and results can serve as guide for rock deformation and failure mechanisms of the jointed rock underground cavern,and seismic engineering design as well.
引文
[1]隋斌,朱维申,李晓静.地震荷载作用下大型地下洞室群的动态响应模拟[J].岩土工程学报,2008,30(12):1877-1882.(Sui Bin,Zhu Weishen,Li Xiao-jing.Simulation on dynamic response of large under-ground opening complex under seismic loads[J].Chi-nese Journal of Geotechnical Engineering,2008,30(12):1877-1882.(in Chinese))
[2]刘新荣,孙辉,陈晓江,等.黄土连拱隧道中墙结构的数值模拟研究[J].地下空间与工程学报,2005,5(6):837-840.(Liu Xinrong,Sun Hui,Chen Xiao-jiang,et al.Numerical analysis on mid-partition struc-ture of the loess double arch tunnel[J].Chinese Jour-nal of Underground Space and Engineering,2005,5(6):837-840.(in Chinese))
[3]卿伟宸,廖红建,钱春宇.地下隧道施工对相邻建筑物及地表沉降的影响[J].地下空间与工程学报,2005,1(6):961-964.(Qing Weichen,LiaoHongjian,Qian Chunyu.The effect construction on thesettlements of adjacent build and earth surfaces of un-derground tunnel[J].Chinese Journal of UndergroundSpace and Engineering,2005,1(6):961-964.(inChinese))
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[5]贾超,王志鹏,朱维申.节理网络模拟的程序实现及其在地下洞室中的动态响应分析[J].岩土力学,2011,32(9):2 867-2 872.(Jia Chao,Wang Zhipeng,Zhu Weishen.The program for joint fissure networksimulation and its dynamic response analysis in under-ground cavity[J].Rock and Soil Mechanics,2011,32(9):2 867-2 872.(in Chinese))
[6]张丽华,陶连金.节理岩体地下洞室群的地震动力响应分析[J].世界地震工程,2002,18(2):158-162.(Zhang Lihua,Tao Lianjin.Dynamic response analysisof large underground excavations in jointed rock[J].World Earthquake Engineering,2002,18(2):158-162.(in Chinese))
[7]Chen Jianyun,Jing Li,Zhou Jing.Seismic analysis oflarge 3-D underground caverns based on high perform-ance recursive method[J].International Journal of Sol-ids and Structures,2004,41(11-12):3 081-3 094.
[8]刘君,孔宪京.节理岩体中隧道开挖与地震作用下围岩的稳定性[J].岩石力学与工程学报,2005,24(增1):4 929-4 933.(Liu Jun,Kong Xianjing.Stability oftunnel in jointed rock masses during excavation and un-der earthquake load[J].Chinese Journal of Rock Me-chanics and Engineering,2005,24(Supp.1):4 929-4 933.(in Chinese))
[9]李海波,马行东,李俊如,等.地震荷载作用下地下岩体洞室位移特征的影响因素分析[J].岩土工程学报,2006,28(3):358-362.(Li Haibo,Ma Xingdong,Li Junru,et al.Study on influence factors of rock cav-ern displacement under earthquake[J].Chinese Journalof Geotechnical Engineering,2006,28(3):358-362.(in Chinese))
[10]马行东,李海波.地震波入射方向对地下岩体洞室动态响应的初步分析[J].水力发电,2007,33(1):23-25.(Ma Xingdong,Li Haibo.Primary analysis of dif-ferent incidence propagation on dynamic response of un-derground rock cavern under earthquake[J].Journal ofHydroelectric Engineering,2007,33(1):23-25.(inChinese))
[11]张玉敏,盛谦,朱泽奇,等.地震作用下大型地下洞室群位移特征的若干影响因素分析[J].岩土力学,2011,31(11):3 525-3 530.(Zhang Yumin,ShengQian,Zhu Zeqi,et al.Some influence factors on dis-placement characteristics of cavern group under strongearthquake[J].Rock and Soil Mechanics,2011,31(11):3 525-3 530.(in Chinese))
[12]王泳嘉,邢纪波.离散元法及其在岩土力学中的应用[M].辽宁:东北工学院出版社,1991.(WangYongjia,Xing Jibo.Discrete element method and itsapplication to rock and soil mechanics[M].Liaoning:Northeast University of Technology Press,1991.(inChinese))
[2]刘新荣,孙辉,陈晓江,等.黄土连拱隧道中墙结构的数值模拟研究[J].地下空间与工程学报,2005,5(6):837-840.(Liu Xinrong,Sun Hui,Chen Xiao-jiang,et al.Numerical analysis on mid-partition struc-ture of the loess double arch tunnel[J].Chinese Jour-nal of Underground Space and Engineering,2005,5(6):837-840.(in Chinese))
[3]卿伟宸,廖红建,钱春宇.地下隧道施工对相邻建筑物及地表沉降的影响[J].地下空间与工程学报,2005,1(6):961-964.(Qing Weichen,LiaoHongjian,Qian Chunyu.The effect construction on thesettlements of adjacent build and earth surfaces of un-derground tunnel[J].Chinese Journal of UndergroundSpace and Engineering,2005,1(6):961-964.(inChinese))
[4]王刚,李术才,王书刚,等.节理岩体大型地下洞室群稳定性分析[J].岩土力学,2008,29(1):261-267.(Wang Gang,Li Shucai,Wang Shugang.Stability a-nalysis of huge underground cavern group in jointed rockmass[J].Rock and Soil Mechanics,2008,29(1):261-267.(in Chinese))
[5]贾超,王志鹏,朱维申.节理网络模拟的程序实现及其在地下洞室中的动态响应分析[J].岩土力学,2011,32(9):2 867-2 872.(Jia Chao,Wang Zhipeng,Zhu Weishen.The program for joint fissure networksimulation and its dynamic response analysis in under-ground cavity[J].Rock and Soil Mechanics,2011,32(9):2 867-2 872.(in Chinese))
[6]张丽华,陶连金.节理岩体地下洞室群的地震动力响应分析[J].世界地震工程,2002,18(2):158-162.(Zhang Lihua,Tao Lianjin.Dynamic response analysisof large underground excavations in jointed rock[J].World Earthquake Engineering,2002,18(2):158-162.(in Chinese))
[7]Chen Jianyun,Jing Li,Zhou Jing.Seismic analysis oflarge 3-D underground caverns based on high perform-ance recursive method[J].International Journal of Sol-ids and Structures,2004,41(11-12):3 081-3 094.
[8]刘君,孔宪京.节理岩体中隧道开挖与地震作用下围岩的稳定性[J].岩石力学与工程学报,2005,24(增1):4 929-4 933.(Liu Jun,Kong Xianjing.Stability oftunnel in jointed rock masses during excavation and un-der earthquake load[J].Chinese Journal of Rock Me-chanics and Engineering,2005,24(Supp.1):4 929-4 933.(in Chinese))
[9]李海波,马行东,李俊如,等.地震荷载作用下地下岩体洞室位移特征的影响因素分析[J].岩土工程学报,2006,28(3):358-362.(Li Haibo,Ma Xingdong,Li Junru,et al.Study on influence factors of rock cav-ern displacement under earthquake[J].Chinese Journalof Geotechnical Engineering,2006,28(3):358-362.(in Chinese))
[10]马行东,李海波.地震波入射方向对地下岩体洞室动态响应的初步分析[J].水力发电,2007,33(1):23-25.(Ma Xingdong,Li Haibo.Primary analysis of dif-ferent incidence propagation on dynamic response of un-derground rock cavern under earthquake[J].Journal ofHydroelectric Engineering,2007,33(1):23-25.(inChinese))
[11]张玉敏,盛谦,朱泽奇,等.地震作用下大型地下洞室群位移特征的若干影响因素分析[J].岩土力学,2011,31(11):3 525-3 530.(Zhang Yumin,ShengQian,Zhu Zeqi,et al.Some influence factors on dis-placement characteristics of cavern group under strongearthquake[J].Rock and Soil Mechanics,2011,31(11):3 525-3 530.(in Chinese))
[12]王泳嘉,邢纪波.离散元法及其在岩土力学中的应用[M].辽宁:东北工学院出版社,1991.(WangYongjia,Xing Jibo.Discrete element method and itsapplication to rock and soil mechanics[M].Liaoning:Northeast University of Technology Press,1991.(inChinese))
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