西安地裂缝活动现状及地铁隧道建设应对措施
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摘要
汾渭盆地是国内地裂缝发育最强烈的地区。西安地处汾渭盆地,已经出露地表和隐伏的地裂缝共发现15条。在综合已有的认识基础上,深化了西安地裂缝成因的认识。通过西安地裂缝的活动现状及其发展趋势分析,针对西安各地裂缝的分布、活动状态和已有监测结果,给出了地裂缝带的最大地表宽度和地铁设防长度;针对地裂缝活动对衬砌结构的影响及破坏作用,从适应地裂缝变形、预防衬砌结构破坏和道床变形调控等方面,探讨了地基处理措施、结构加强措施、道床结构措施,阐述了西安地铁2号线通过地裂缝时地铁隧道建设的应对措施。目前,确立的"放"与"防"的设计指导思想是西安地铁隧道穿越地裂缝设计方案进一步完善和深入研究的基础。
The Fen-Wei basin is the most serious area of the ground fissure formation in China.Xi'an is located in Fenwei basin and the exposed surface of the cracks and fractures were found concealed in 15.Based on the existing knowledge,the new point about the causation of Xi'an crack is raised.According to the research of Xi'an crack on the current status of activities and its development trends,the cracks in the surface with the largest width and length of metro security is raised on the expert advice and the latest research.The MTR measures to deal with cracks are raised on the analysis of the impact and failure mode on the structure which is caused by the cracks.Based on the existing knowledge and research,analysis of the development tendency of Xi'an cracks and the MTR measures to deal with cracks will contribute to the development of urban underground track.
The Fen-Wei basin is the most serious area of the ground fissure formation in China.Xi'an is located in Fenwei basin and the exposed surface of the cracks and fractures were found concealed in 15.Based on the existing knowledge,the new point about the causation of Xi'an crack is raised.According to the research of Xi'an crack on the current status of activities and its development trends,the cracks in the surface with the largest width and length of metro security is raised on the expert advice and the latest research.The MTR measures to deal with cracks are raised on the analysis of the impact and failure mode on the structure which is caused by the cracks.Based on the existing knowledge and research,analysis of the development tendency of Xi'an cracks and the MTR measures to deal with cracks will contribute to the development of urban underground track.
引文
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[2]易学发,苏刚,王卫东,等.西安地裂缝带的基本特征与形成机制[J].地震地质,1997,19(4):289-295.
[3]林元武,翟盛华,范树全.西安地裂缝H2异常与地裂缝成因探讨[J].中国地质灾害与防治学报,1994,5(2):32-36.
[4]王德潜,索传郿,贾思吉.西安地裂缝近期超常活动因素及其量化分析[J].陕西地质,1996,14(1):49-58.
[5]索传郿,王德潜,刘祖植.西安地裂缝地面沉降与防治对策[J].第四纪研究,2005,25(1):23-28.
[6]李新生,闫文中,李同录,等.西安地裂缝活动趋势分析[J].地质工程学报,2001,9(1):39-43.
[7]张家明.西安地裂缝研究[M].西北大学出版社,1992.
[8]廉金栓,索传郿.西安地裂缝近期活动加剧原因浅析[J].中国地质灾害与防治学报,1994,5(增刊):429-430.
[9]刘快胜,张家明,米秋霞.西安地裂缝近期活动与热水井水位关系研究[J].华北地震科学,1996,14(2):67-73.
[10]李新生,王静,王万平,等.西安地铁二号线沿线地裂缝特征、危害及对策[J].工程地质学报,2007,15(4):463-468.
[11]李凤蓉.西安市轨道交通二号线区间隧道穿越地裂缝带的技术方案探析[J].隧道建设,2006,26(6):30-33.
[12]丁先立,季同月.西安地铁地裂缝处理[J].山西建筑,2007,33(13):336-356.
[13]林康利.西安地铁二号线沿线地裂缝带的结构及防水措施[J].铁道勘察,2007,4:64-66.
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