泡沫混凝土减震层对隧道地震响应影响分析
|
摘要
应用有限差分软件FLAC3D对泡沫混凝土减震层对花岗岩隧道地震响应的影响规律进行分析.综合考虑围岩位移、塑性区范围、应力场分布、应变增量等指标,得出增设泡沫混凝土减震层可以大幅降低围岩最大主应力以及衬砌结构的内力,有利于围岩的稳定.其次分析了减震层各物理力学参数对花岗岩隧道地震响应的具体影响,得出增加减震层变形模量或粘聚力可以大幅降低衬砌结构中的内力;而减震层的内摩擦角及泊松比的改变对减震层的减震效果影响较小.
The influences of foam concrete buffer layer on a granite tunnel during earthquake are analyzed using the finite-difference program FLAC3D.Based on the studies of displacements,plastic zone,stress field,strain increment of surrounding rock,it can be concluded that the maximum principal stress of surrounding rock and the inner force of liner are reduced significantly by setting foam concrete buffer layer.It is beneficial for the stabilization of tunnel.Then the influences of physical-mechanical parameters of foam concrete are analyzed respectively.It is shown that the inner force of liner is reduced rapidly by increasing the modulus or the cohesive of buffer layer.But the changing of the internal friction angle and Poisons ratio take little influence on the effect of damping of buffer layer.Results of this research can provide certain references for seismic design of granite tunnel.
The influences of foam concrete buffer layer on a granite tunnel during earthquake are analyzed using the finite-difference program FLAC3D.Based on the studies of displacements,plastic zone,stress field,strain increment of surrounding rock,it can be concluded that the maximum principal stress of surrounding rock and the inner force of liner are reduced significantly by setting foam concrete buffer layer.It is beneficial for the stabilization of tunnel.Then the influences of physical-mechanical parameters of foam concrete are analyzed respectively.It is shown that the inner force of liner is reduced rapidly by increasing the modulus or the cohesive of buffer layer.But the changing of the internal friction angle and Poisons ratio take little influence on the effect of damping of buffer layer.Results of this research can provide certain references for seismic design of granite tunnel.
引文
[1]张斌,许金余,李乐,等.泡沫混凝土回填层在地下复合结构中的抗爆特性分析[J].四川建筑科学研究,2010,36(6):135-138.
[2]唐德高,王昆明,贺虎成,等.泡沫混凝土回填层在坑道中的耗能作用[J].解放军理工大学学报:自然科学报,2006,7(4):365-370.
[3]高峰,石玉成,严松宏,等.隧道洞口段的抗震设防长度[J].中国公路学报,2006,19(3):65-69.
[4]中华人民共和国建设部.GB50086-2001锚杆喷射混凝土支护技术规范[S].北京:中国计划出版社,2001.
[5]郑永来,杨林德,李文艺,等.地下结构抗震[M].上海:同济大学出版社,2005.
[6]Wang W L,Wang T T,Su J J.Assessment of damage in mountain tunnels due to the Taiwan Chi-Chi Earthquake[J].Tunne-ling Underground Space Technology,2001,16(3):133-150.
[7]陈庆,项宗方.地下结构抗震研究现状综述[J].四川建筑科学研究,2011,37(6):130-133.
[8]郑颖人,肖强,叶海林.地震隧洞稳定性分析探讨[J].岩石力学与工程报,2010,29(6):1 082-1 088.
[9]Zheng Y R,Den C J,Tang X S,et al.Development of finite element limiting analysis method and its application in geotechni-cal engineering[J].Engineering Science,2007,3(5):10-36.
[10]Hashash Y M A,Hook J J,Schmidt B.Seismic design and analysis of underground structures[J].Tunneling UndergroundSpace Technology,2001,16(4):247-293.
[11]Itasca Consulting Group.Fast Lagrangian analysis of continua in three dimensions(version 3.0),user’s manual[R].[s.l.]:Itasca Consulting Group,2003.
[12]St john C M,Zahrah T F.Aseismic design of underground structures[J].Tunneling Underground Space Technology,1987,2(2):165-197.
[13]Bhasin R,Heg K.Effect of seismicity on rock support in tunnels[R].World Tunnel Congress 2008-Underground Facilitiesfor Better Environment and Safety.Oslo:Norwegian Geotechnical Institute,2008.
[14]田志敏,钱七虎,吴步旭.大压力爆炸动载作用下地下复合圆形结构研究[J].特种结构,1997,14:40-43.
[15]黄胜,陈卫忠,杨建平,等.地下工程地震动力响应及抗震研究[J].岩石力学与工程学报,2009,28(3):483-490.
[2]唐德高,王昆明,贺虎成,等.泡沫混凝土回填层在坑道中的耗能作用[J].解放军理工大学学报:自然科学报,2006,7(4):365-370.
[3]高峰,石玉成,严松宏,等.隧道洞口段的抗震设防长度[J].中国公路学报,2006,19(3):65-69.
[4]中华人民共和国建设部.GB50086-2001锚杆喷射混凝土支护技术规范[S].北京:中国计划出版社,2001.
[5]郑永来,杨林德,李文艺,等.地下结构抗震[M].上海:同济大学出版社,2005.
[6]Wang W L,Wang T T,Su J J.Assessment of damage in mountain tunnels due to the Taiwan Chi-Chi Earthquake[J].Tunne-ling Underground Space Technology,2001,16(3):133-150.
[7]陈庆,项宗方.地下结构抗震研究现状综述[J].四川建筑科学研究,2011,37(6):130-133.
[8]郑颖人,肖强,叶海林.地震隧洞稳定性分析探讨[J].岩石力学与工程报,2010,29(6):1 082-1 088.
[9]Zheng Y R,Den C J,Tang X S,et al.Development of finite element limiting analysis method and its application in geotechni-cal engineering[J].Engineering Science,2007,3(5):10-36.
[10]Hashash Y M A,Hook J J,Schmidt B.Seismic design and analysis of underground structures[J].Tunneling UndergroundSpace Technology,2001,16(4):247-293.
[11]Itasca Consulting Group.Fast Lagrangian analysis of continua in three dimensions(version 3.0),user’s manual[R].[s.l.]:Itasca Consulting Group,2003.
[12]St john C M,Zahrah T F.Aseismic design of underground structures[J].Tunneling Underground Space Technology,1987,2(2):165-197.
[13]Bhasin R,Heg K.Effect of seismicity on rock support in tunnels[R].World Tunnel Congress 2008-Underground Facilitiesfor Better Environment and Safety.Oslo:Norwegian Geotechnical Institute,2008.
[14]田志敏,钱七虎,吴步旭.大压力爆炸动载作用下地下复合圆形结构研究[J].特种结构,1997,14:40-43.
[15]黄胜,陈卫忠,杨建平,等.地下工程地震动力响应及抗震研究[J].岩石力学与工程学报,2009,28(3):483-490.
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