西安地铁二号线沿线地裂缝未来位错量估算及工程分级
摘要
地裂缝在地铁设计使用期内的最大垂直位错量是西安地铁二号线穿越地裂缝结构设计的一个十分重要的参数。本文以历史水准监测资料为基础,分析了西安地铁二号线沿线各地裂缝在不同历史阶段的活动特征与活动原因,对各地裂缝的未来活动趋势进行了预测。然后通过基于不同时间段地裂缝活动速率的最大垂直位错量估算结果的对比分析,得出了地铁设计使用期内各条地裂缝与地铁交汇点处地裂缝的最大垂直位错量,并以此为依据,将西安地铁二号线沿线地裂缝分为Ⅰ、Ⅱ、Ⅲ和Ⅳ级等4个工程级别。
The maximum vertical displacement of ground fissure is an important parameter to the structural design of Xi'an Metro Line 2 going through ground fissures.Based on leveling monitoring data,the activity characteristics in different stage of each ground fissure along Xi'an metro Line 2 are analysed in this paper.The future activity trend of each ground fissure is predicted.Then through the contrast analysis of the maximum vertical displacements calculated by the annual activity rate of different historical stages,the maximum vertical displacement of crossing points in which ground fissures intersect with Xi'an Metro Line 2 are gotten.The ground fissures along Xi'an Metro Line 2 are classified into four categories,i.e.Ⅰ,Ⅱ,Ⅲ and Ⅳ according to the maximum vertical displacements of ground fissures.
The maximum vertical displacement of ground fissure is an important parameter to the structural design of Xi'an Metro Line 2 going through ground fissures.Based on leveling monitoring data,the activity characteristics in different stage of each ground fissure along Xi'an metro Line 2 are analysed in this paper.The future activity trend of each ground fissure is predicted.Then through the contrast analysis of the maximum vertical displacements calculated by the annual activity rate of different historical stages,the maximum vertical displacement of crossing points in which ground fissures intersect with Xi'an Metro Line 2 are gotten.The ground fissures along Xi'an Metro Line 2 are classified into four categories,i.e.Ⅰ,Ⅱ,Ⅲ and Ⅳ according to the maximum vertical displacements of ground fissures.
引文
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[2]Peng J B,Sun P,Li X An,Ground fissure:The major geological and environmental problem in the development of Xi’an city,Chi-na.Environment Science and Technology,American Science Press,2006,4.
[3]Youli Li,Jingchun Yang,Xiaomeng Hu.Origin of ground fissures in the Shanxi Graben System,Northern China[J].Engineering Geology,2000,(55):267～275.
[4]王景明,王春梅,刘科.地裂缝及其灾害研究的新进展[J].地球科学进展,2001,16(3):303～313.Wang Jinming,Wang Chunmei,Liu Ke.Progress in ground fissures and its hazard research.Advance in Earth Science,2001,16(3):303～313.
[5]彭建兵.中国活动构造与环境灾害研究中的若干重大问题[J].工程地质学报,2006,14(1):5～12.Peng Jianbin.Some important problems to be addressed in research of active tectonics and environmental disastera in China.Journal of Egnineering Geology,2006,14(1):5～12.
[6]王庆良,刘玉海,陈志新等.抽水引起的含水层水平应变—地裂缝活动新机理[J].工程地质学报,2002,10(1):46～50.Wang Qingliang,Liu Yuhai,Chen Zhixin,etal.Horizontal strain of aquifer induced by ground water pumping-a new mechanism for ground fissure movement.Journal of Engineeing Geology,2002,10(1):46～50.
[7]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.Yi Xuefa,Su gang,Wang Weidong,etal.Basic characteristics of the fissures zones in Xi’an and their causive mechanism.Seismology and Geology,1997,19(4):289～295.
[8]陈志新.地裂缝成灾机理及防御对策[J].西安工程学院学报,2002,24(2):17～25.Chen Zhixin.Mechanism of ground fissures and its prevention countermeasures.Journal of Xi’an Engineering University,2002,24(2):17～25.
[9]吴成基.再论西安地裂缝的时空观及现实意义[J].灾害学,1997,12(1):84～87.Wu Chengji.Rediscussion on space-time continuum of the Xi’an ground fissures and the practiceal significance.Journal of Catastro-phology,1997,12(1):84～87.
[10]朱慕仁,张家明.西安地裂缝及其工程地质意义[J].水文地质工程地质,1982,(5):23～25.Zhu Muren,Zhang Jiaming.The ground fissures and its signifi-cance of engineering geology in Xi’an.Hydrogeology and Engi-neering Geology,1982,(5):23～25.
[11]王景明等著.地裂缝及其灾害的理论分析与应用[M].西安:陕西科学技术出版社,2000.Wang Jingming,et al..Theory of ground fissures hazards and its application.Xi’an:Science and Technology Press of Shaanxi,2000.
[12]张家明主编.西安地裂缝研究[M].西安:西北大学出版社,1990.Zhang Jiaming.Research on ground fissures in the region of Xi’an.Xi’an:The University of Northwest Press,1990.
[13]李永善,等编著.西安地裂缝及渭河盆地活断层研究[M].北京:地震出版社,1992.Li Yongshan,etal.Research on ground fissures in Xi’an region and active faults in Weihe basin.Beijing:Seismic Press,1992.
[14]彭建兵等.渭河盆地活动断裂与地质灾害[M].西安:西北大学出版社,1992.Peng Jianbing,et al..Active faults and geological disaster of Weihe river basin.Xi'an:Northwest University Press,1992.
[15]陕西省建设厅,陕西省质量技术监督局.西安地裂缝场地勘察与工程设计规程(DBJ61-6-2006,J10821-2006)[S].西安,2006.The construction bureau of Shaanxi province,the supervision bu-reau of quality technology of Shaanxi province.Specification for site investingation and engineering design on Xi’an ground frac-tures(DBJ61-6-2006,J10821-2006).Xi’an,2006.
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