徐盐客运专线穿越郯庐断裂带工程对策研究
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摘要
研究目的:郯庐断裂带是一条现今仍在活动的巨型强震构造带,为确保徐盐客运专线穿越活动断裂带铁路工程的安全性,通过对郯庐断裂带稳定性分区和评价、工程地质选线、试验与研究,提出修建路基、桥梁、站场等结构工程对策与措施。研究结论:(1)铁路穿越活动性断裂带,工程地质选线应优先绕避活动断裂或尽量从断裂较窄、活动较弱处通过的走向方案;(2)全新世活动断裂F5断裂破碎带对铁路工程影响最大,不应设置桥梁工程,应采用路基方式通过;(3)晚更新世活动断裂F3断裂破碎带对铁路工程有一定的影响,原则上不应设置特殊结构、高墩、大跨桥梁;(4)大阻尼双曲面减隔震桥梁支座的减隔震效果显著,满足强震作用下桥梁抗震设计要求;(5)通长式加筋路堤在跨断裂带区域具有更好的整体性和更加安全的沉降稳定性;(6)管桩复合地基具有更好的抗震性能;(7)本研究成果对以后类似条件地区的铁路工程建设具有指导意义。
Research purposes:The Tanlu fault zone is a giant strong earthquake tectonic belt that is still active today.To ensure the safety of the railway project of Xuzhou-Yancheng High Speed Railway crossing the active fault zone,this paper proposed the structural engineering countermeasures and measures for building roadbeds,bridges and stations,by the stability division and evaluation,engineering geological line selection,experiment and research of the fault zone.Research conclusions:(1) The railway crosses the active fault zone,and the engineering geological line selection should give priority to avoiding active faults or as far as possible from the narrower fractures and weaker movements.(2) Holocene active fault F5 fracture zone has the greatest impact on railway engineering.Bridge construction should be not sited and should be sited by roadbed method.(3) F3 fault fracture zone of late Pleistocene active fault has certain influence on railway engineering.In principle,special structure,high pier and long-span bridge should not be set.(4) Large damped hyperboloid seismic isolation bridge support has significant seismic isolation effect,meeting the seismic design requirements of bridges under strong earthquakes.(5) Wide-length reinforced embankment has better cross-fracture zone Integral and safer settlement stability.(6) Pipe pile composite foundation has better seismic performance.(7) The research results have guiding significance for railway construction in similar conditions in the future.
Research purposes:The Tanlu fault zone is a giant strong earthquake tectonic belt that is still active today.To ensure the safety of the railway project of Xuzhou-Yancheng High Speed Railway crossing the active fault zone,this paper proposed the structural engineering countermeasures and measures for building roadbeds,bridges and stations,by the stability division and evaluation,engineering geological line selection,experiment and research of the fault zone.Research conclusions:(1) The railway crosses the active fault zone,and the engineering geological line selection should give priority to avoiding active faults or as far as possible from the narrower fractures and weaker movements.(2) Holocene active fault F5 fracture zone has the greatest impact on railway engineering.Bridge construction should be not sited and should be sited by roadbed method.(3) F3 fault fracture zone of late Pleistocene active fault has certain influence on railway engineering.In principle,special structure,high pier and long-span bridge should not be set.(4) Large damped hyperboloid seismic isolation bridge support has significant seismic isolation effect,meeting the seismic design requirements of bridges under strong earthquakes.(5) Wide-length reinforced embankment has better cross-fracture zone Integral and safer settlement stability.(6) Pipe pile composite foundation has better seismic performance.(7) The research results have guiding significance for railway construction in similar conditions in the future.
引文
[1]张鹏,李丽梅,张景发,等.郯庐断裂带江苏段第四纪活动特征及其动力学背景探讨[J].防灾减灾工程学报,2011(4):389-396.Zhang Peng,Li Limei,Zhang Jingfa,etc.Quaternary Activity Characteristics and Dynamic Background of the Jiangsu Section of the Tanlu Fault Zone[J].Journal of Disaster Prevention and Mitigation Engineering,2011(4):389-396.
[2]许再良,李国和,李翔.沂沭断裂带区域工程地质与铁路选线勘察[M].北京:地震出版社,2008.Xu Zailiang,Li Guohe,Li Xiang.Regional Engineering Geology and Railway Line Survey in the Yishu Fault Zone[M].Beijing:Seismological Press,2008.
[3]龚伟,曾佐勋,王杰,等.郯庐断裂带江苏段第四纪活动性研究[J].地震研究,2010(1):86-92.Gong Wei,Zeng Zuoxun,Wang Jie,etc.Quaternary Activity Study of the Jiangsu Section of the Tanlu Fault Zone[J].Earthquake Research,2010(1):86-92.
[4]谢瑞征,朱书俊,丁政.郯庐断裂带江苏段全新世活动问题的商榷[J].地震学刊,1991(4):15-18.Xie Ruizheng,Zhu Shujun,Ding Zheng,Discussion on the Holocene Activity Problem in the Jiangsu Section of the Tanlu Fault Zone[J].Seismological Journal,1991(4):15-18.
[5]宿迁市人民政府.《宿迁市城市总体规划(2015-2030)》[Z].宿迁:宿迁市人民政府,2017.Suqian City People's Government.Suqian City Master Plan(2015-2030)[Z].Suqian:Suqian City People's Government,2017.
[6]TB 10621-2014,高速铁路设计规范[S].TB 10621-2014,Code for Design of High Speed Railway[S].
[7]顾成权.河源断裂带对京九高速铁路工程安全影响研究[J].铁道工程学报,2016(6):44-48.Gu Chengquan.Study on the Impact of Heyuan Fault Zone on the Safety of Beijing-Kowloon High-speed Railway Project[J].Journal of Railway Engineering Society,2016(6):44-48.
[8]李晓波.高速铁路连续梁桥纵向减震装置机理研究[J].铁道工程学报,2017(12):50-56.Li Xiaobo.Research on Mechanism of Longitudinal Damping Device for Continuous Beam Bridge of High Speed Railway[J].Journal of Railway Engineering Society,2017(12):50-56.
[2]许再良,李国和,李翔.沂沭断裂带区域工程地质与铁路选线勘察[M].北京:地震出版社,2008.Xu Zailiang,Li Guohe,Li Xiang.Regional Engineering Geology and Railway Line Survey in the Yishu Fault Zone[M].Beijing:Seismological Press,2008.
[3]龚伟,曾佐勋,王杰,等.郯庐断裂带江苏段第四纪活动性研究[J].地震研究,2010(1):86-92.Gong Wei,Zeng Zuoxun,Wang Jie,etc.Quaternary Activity Study of the Jiangsu Section of the Tanlu Fault Zone[J].Earthquake Research,2010(1):86-92.
[4]谢瑞征,朱书俊,丁政.郯庐断裂带江苏段全新世活动问题的商榷[J].地震学刊,1991(4):15-18.Xie Ruizheng,Zhu Shujun,Ding Zheng,Discussion on the Holocene Activity Problem in the Jiangsu Section of the Tanlu Fault Zone[J].Seismological Journal,1991(4):15-18.
[5]宿迁市人民政府.《宿迁市城市总体规划(2015-2030)》[Z].宿迁:宿迁市人民政府,2017.Suqian City People's Government.Suqian City Master Plan(2015-2030)[Z].Suqian:Suqian City People's Government,2017.
[6]TB 10621-2014,高速铁路设计规范[S].TB 10621-2014,Code for Design of High Speed Railway[S].
[7]顾成权.河源断裂带对京九高速铁路工程安全影响研究[J].铁道工程学报,2016(6):44-48.Gu Chengquan.Study on the Impact of Heyuan Fault Zone on the Safety of Beijing-Kowloon High-speed Railway Project[J].Journal of Railway Engineering Society,2016(6):44-48.
[8]李晓波.高速铁路连续梁桥纵向减震装置机理研究[J].铁道工程学报,2017(12):50-56.Li Xiaobo.Research on Mechanism of Longitudinal Damping Device for Continuous Beam Bridge of High Speed Railway[J].Journal of Railway Engineering Society,2017(12):50-56.