盾构隧道基底软硬过渡地段列车振动响应分析
|
摘要
论述了隧道衬砌结构-围岩系统动力分析的理论和数值计算方法,采用激振力函数模拟高速列车竖向振动荷载,考虑隧道基底地层纵向软硬不均,建立了广深港客运专线狮子洋盾构隧道列车振动响应三维有限差分计算模型,研究了高速列车振动荷载作用下软硬不均过渡地段隧道衬砌结构振动响应规律,并通过引入长期列车振动荷载作用下地基土累积变形计算模型,预测了软硬不均地层条件下不同地段隧道基底的长期差异沉降.计算结果对评价软硬不均地层盾构隧道衬砌结构的动力稳定性和控制隧道基底不均匀沉降具有一定的指导意义.
A theory of dynam ic FDM and a numericalmethod for the lining structure of tunnels and surround-ing rock systems are put forward.Based on the numerical simulation of vertical load induced by high speed train with excitation function,a three-d imension finite d ifference model that takes into account the longitud i-nal uneven tunnel basement strata of Shi Z iyang shield tunnel is established to study structure dynam ic me-chanical response.The dynam ic response characteristics of tunnel structure by the high-speed train vibration load is stud ied and the research emphasizes the variation of tunnel lining structure d isplacement and principal stress under the longitud inal uneven strata cond itions.The d ifferent long-term settlement under uneven tun-nel basement strata is pred icted by introducing the empirical accumulative plastic strain model.The analysis results have significance not only for the dynam ic stability evaluation of tunnel structures for high-speed rail-way but also for the control of uneven settlement.
A theory of dynam ic FDM and a numericalmethod for the lining structure of tunnels and surround-ing rock systems are put forward.Based on the numerical simulation of vertical load induced by high speed train with excitation function,a three-d imension finite d ifference model that takes into account the longitud i-nal uneven tunnel basement strata of Shi Z iyang shield tunnel is established to study structure dynam ic me-chanical response.The dynam ic response characteristics of tunnel structure by the high-speed train vibration load is stud ied and the research emphasizes the variation of tunnel lining structure d isplacement and principal stress under the longitud inal uneven strata cond itions.The d ifferent long-term settlement under uneven tun-nel basement strata is pred icted by introducing the empirical accumulative plastic strain model.The analysis results have significance not only for the dynam ic stability evaluation of tunnel structures for high-speed rail-way but also for the control of uneven settlement.
引文
[1]李亮,张丙强,杨小礼.高速列车振动荷载下大断面隧道结构动力响应分析[J].岩石力学与工程学报,2005,24(23):4259-4265.
[2]DEGRANDE G,CLOUTEAUB D.A numerical modelfor ground-borne vibrations from underground railwaytraffic based on a periodic finite element boundary ele-ment formulation[J].Journal of Sound and Vibration,2006(293):645-666.
[3]莫海鸿,邓飞皇,王军辉.营运期地铁盾构隧道动力响应分析[J].岩石力学和工程学报,2006,25(增2):3507-3512.
[4]梁波,罗红,孙常新.高速铁路振动荷载的模拟研究[J].铁道学报,2006,28(4):89-94.
[5]克拉夫R,彭津J.结构动力学[M].王光远,译.北京:高等教育出版社,2006.
[6]祝彦知,冯紫良,方志.地震作用下考虑各项异性土体盾构隧道数值模拟[J].岩土力学,2005,26(5):710-716.
[7]王其昌.高速铁路土木工程[M].成都:西南交通大学出版社,1999.
[8]PUPPALA A J,MOHAMMAD L N,ALLEN A.Per-manent deformation characterization of subgrade soilsfrom RLTtest[J].Journal of Materials in Civil Engi-neering,1999,11(4):274-282.
[2]DEGRANDE G,CLOUTEAUB D.A numerical modelfor ground-borne vibrations from underground railwaytraffic based on a periodic finite element boundary ele-ment formulation[J].Journal of Sound and Vibration,2006(293):645-666.
[3]莫海鸿,邓飞皇,王军辉.营运期地铁盾构隧道动力响应分析[J].岩石力学和工程学报,2006,25(增2):3507-3512.
[4]梁波,罗红,孙常新.高速铁路振动荷载的模拟研究[J].铁道学报,2006,28(4):89-94.
[5]克拉夫R,彭津J.结构动力学[M].王光远,译.北京:高等教育出版社,2006.
[6]祝彦知,冯紫良,方志.地震作用下考虑各项异性土体盾构隧道数值模拟[J].岩土力学,2005,26(5):710-716.
[7]王其昌.高速铁路土木工程[M].成都:西南交通大学出版社,1999.
[8]PUPPALA A J,MOHAMMAD L N,ALLEN A.Per-manent deformation characterization of subgrade soilsfrom RLTtest[J].Journal of Materials in Civil Engi-neering,1999,11(4):274-282.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心