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拟建哈—佳铁路工程地震安评抗断参数研究——以依兰-伊通断裂为例
引用本文:余中元,韦庆海,王丽梅,马艳丽,张立忱,欧阳兆国.拟建哈—佳铁路工程地震安评抗断参数研究——以依兰-伊通断裂为例[J].震灾防御技术,2014,9(1):53-63.
作者姓名:余中元  韦庆海  王丽梅  马艳丽  张立忱  欧阳兆国
作者单位:黑龙江省地震局,地震工程研究院,哈尔滨 150090;地震动力学国家重点实验室,中国地震局地质研究所,北京 100029;黑龙江省地震局,地震工程研究院,哈尔滨 150090;黑龙江省地震局,地震工程研究院,哈尔滨 150090;黑龙江省地震局,地震工程研究院,哈尔滨 150090;黑龙江省地震局,地震工程研究院,哈尔滨 150090;黑龙江省地震局,地震工程研究院,哈尔滨 150090
基金项目:中国地震局星火计划项目“依兰-伊通断裂黑龙江段新活动的几何展布图像研究”(编号:XH14018Y)资助
摘    要:在对依兰-伊通断裂通河段晚第四纪活动参数获取的基础上,对该断裂的几何学特征和晚第四纪活动特征及有关拟建铁路地震安全的设防参数进行了探讨.研究结果表明,依兰-伊通断裂通河段总体走向N30-40°E,由3条断层组成,中支最新活动时代为全新世.该断裂未来发生7级地震时的水平位移量可能达2.2m左右,垂直位错量约为1.1m左右.该断裂全新世以来的活动性质表现为右旋走滑为主,兼具逆冲活动.根据探槽结果和野外地震地质调查得出断裂垂直位错约(1.0±0.2)m,右旋位错量约为(2.7±0.1)m,(1730-30)aB.P.以来的垂直滑动速率和水平滑动速率分别约为(0.57±0.11)mrn/a和(1.57±0.06)mm/a.未来100年内若遭遇地震,其最大水平位错量约2.87m,垂直位错值为1.04m.断层影响带宽度约为8m.该研究结果为拟建哈—佳铁路工程可能遭受的断层影响和抗震设防提供了一定的数据基础,也为地震安评中线状工程的抗断评价问题提供了一定的参考.

关 键 词:地震安评  长距离线状工程  抗断评价
收稿时间:6/9/2013 12:00:00 AM

Fault Safety Evaluation on Proposed Harbin-Jiamusi Railway: A Case Study of Yilan-Yitong Fault
Yu Zhongyuan,Wei Qinghai,Wang Limei,Ma Yanli,Zhang Lichen and Ouyang Zhaoguo.Fault Safety Evaluation on Proposed Harbin-Jiamusi Railway: A Case Study of Yilan-Yitong Fault[J].Technology for Earthquake Disaster Prevention,2014,9(1):53-63.
Authors:Yu Zhongyuan  Wei Qinghai  Wang Limei  Ma Yanli  Zhang Lichen and Ouyang Zhaoguo
Institution:Yu Zhongyuan,Wei Qinghai,Wang Limei,Ma Yanli,Zhang Lichen,Ouyang Zhaoguo(Heilongjiang Earthquake Administration, Harbin 150090, China;State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration,Beijing 100029, China)
Abstract:In this paper the fault geometry characteristics,late quaternary activity characteristics and the safety parameters of Yilan-Yitong fault on seismic safety to proposed Harbin-Jiamusi railway were discussed.Our results showed that the Tonghe segment is part of a system of east north trending reverse,oblique-slip,and right-lateral strike-slip of Yilan-Yitong faults,which mainly consists of three branches,with latest activity time of the middle branch in late Holocene.The estimated horizontal displacement is about 2.2 meters,and the estimated vertical offset is about 1.1 meters if assumed Ms7.0 earthquake occurred.The fault activity in Holocene is mainly right-lateral strike-slip with reverse movement.The trench survey realized the vertical offset amount up to (1.0±0.2) m with (2.7±0.1) m dextral slip.Given the maximum and minimum constraints determined above,we calculated that dip-slip rates of (0.57±0.11) mm/a and strike-slip rates of (1.57±0.06) mm/a respectively following the M7.5 paleoearthquake occurred (1730±30) a B.P.,which has produced the maximum lateral offset about 2.87m with 1.04m dip slip.In such a case,the influence width of the fault is about 8 meters.Our results make it possible for us to evaluate the influence of fault activity on the proposed railway and the seismic hazard of the fault in the future.
Keywords:Seismic safety evaluation  Long-distance linear engineering  Break-resisting valuation
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