四川汶川地震诱发滑坡与峰值速度的关系
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摘要
利用汶川地震诱发的滑坡资料和得到的地震动数据,对地震诱发滑坡与峰值速度的关系进行了分析,得到一些基本认识:①地震诱发滑坡与地震动峰值速度(PGV)存在明显的正相关性,可以利用PGV作为判别地震滑坡的判据;②汶川地震龙门山震区可以触发地震滑坡的PGV下限约为0.5m/s;③龙门山震区可以触发地震滑坡的PGV上限约为1.5m/s;④建立了汶川地震龙门山震区PGV衰减关系,可用以估计地震滑坡致灾的范围。利用地震动参数研究地震诱发滑坡具有很好的一致性,可以克服应用烈度时存在的不足。上述研究结果可以应用于震后灾害快速评估工作中,为应急救援方案的制定提供参考信息。
Based on the data of landslides induced by the Wenchuan earthquake and of strong ground motion,the relationship between earthquake-induced landslides and PGV is analyzed and some conclusions are obtained as following:(1) There exists an obvious positive relation between earthquake-induced landslides and PGV,therefore,PGV can be used to judge the failure result of slopes after an earthquake.(2) The PGV threshold,which can trigger landslides in the Longmenshan earthquake-hit areas,is about 0.5m/s.(3) The upper limit of PGV is about 1.5m/s in the Longmenshan areas.(4) An attenuation law of PGV is built for the Longmenshan areas,which can be used to estimate the area affected by earthquake-induced landslides.Consistency is found if ground motion parameters are used to measure earthquake-induced landslides,which can compensate the deficiencies of earthquake intensity.Research result obtained from this paper can be applied to the rapid hazard evaluation work after an earthquake and provides reference information for emergency rescue decision making.
Based on the data of landslides induced by the Wenchuan earthquake and of strong ground motion,the relationship between earthquake-induced landslides and PGV is analyzed and some conclusions are obtained as following:(1) There exists an obvious positive relation between earthquake-induced landslides and PGV,therefore,PGV can be used to judge the failure result of slopes after an earthquake.(2) The PGV threshold,which can trigger landslides in the Longmenshan earthquake-hit areas,is about 0.5m/s.(3) The upper limit of PGV is about 1.5m/s in the Longmenshan areas.(4) An attenuation law of PGV is built for the Longmenshan areas,which can be used to estimate the area affected by earthquake-induced landslides.Consistency is found if ground motion parameters are used to measure earthquake-induced landslides,which can compensate the deficiencies of earthquake intensity.Research result obtained from this paper can be applied to the rapid hazard evaluation work after an earthquake and provides reference information for emergency rescue decision making.
引文
[1]黄润秋,李为乐.“5.12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,2008,27(12):2585-2592.
[2]殷跃平.汶川八级地震地质灾害研究[J].工程地质学报,2008,16(4):433-444.
[3]崔鹏,韦方强,陈晓清,等.汶川地震次生山地灾害及其减灾对策[J].科技赈灾,2008,23(4):433-444.
[4]刘传正.四川汶川地震灾害与地质环境安全[J].地质通报,2008,27(11):1907-1912.
[5]李天池.地震与滑坡的关系及地震滑坡预测的探讨[C]//滑坡文集(第2集).北京:人民铁道出版社,1979:127-132.
[6]Zhou Bengang,Zhang Yuming.Some characteristics of earthquake-induced landslide in southwestern China[J].Northwestern Seismolog-ical Journal,1994,16(1):95-103.
[7]辛鸿博,王余庆.岩土边坡地震崩滑及其初判准[J].岩土工程学报,1999,21(5):591-594.
[8]王兰民,等.黄土动力学[M].北京:地震出版社,2003.
[9]Wilson R C,Keefer D K.Dynamic analysis of a slope failure fromthe 6 August 1979 Coyote Lake,California,Earthquake[J].Bulletin ofthe Seismological Society of America,1983,73(3):863-877.
[10]Wilson R C,Keefer D K.Predicting Areal Limits of Earthquake-induced Landsliding[C]//Ziony J I.Evaluating Earthquakes Hazardsin the Los Angeles Region—an Earth-Science Perspective,US Ge-ological Survey Professional Paper 1360.Washington,United States:U.S.G.P.O,1985:317-345.
[11]Harp E L,Wilson R C.Shaking intensity thresholds for rock fallsand slides:Evidence from 1987 Whittier narrows and superstitionHilss Earthquake strong-motion records[J].Bulletin of the Seismo-logical Society of America,1995,85(6):1739-1757.
[12]胡聿贤,等.地震工程学(第二版)[M].北京:地震出版社,2006.
[13]徐锡伟,闻学泽,叶建青,等.汶川Ms 8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597-629.
[14]LI Xiaojun,ZHOU Zhenghua,YU Haiying,et al.Strong motionobservations and recordings from the great Wenchuan Erthquake[J].Earthquake Engineering and Engineering Vibration,2008,7(3):235-246.
[15]于海英,王栋,杨永强,等.汶川8.0级地震强震动特征初步分析[J].震灾防御技术,2008,3(4):321-336.
[16]周朝晖.2008年四川汶川8.0级地震强震动台网观测记录[J].四川地震,2008,(4):25-29.
①国土资源部地质环境监测院.“5.12”汶川地震区地质灾害防治区划图.2008.
[2]殷跃平.汶川八级地震地质灾害研究[J].工程地质学报,2008,16(4):433-444.
[3]崔鹏,韦方强,陈晓清,等.汶川地震次生山地灾害及其减灾对策[J].科技赈灾,2008,23(4):433-444.
[4]刘传正.四川汶川地震灾害与地质环境安全[J].地质通报,2008,27(11):1907-1912.
[5]李天池.地震与滑坡的关系及地震滑坡预测的探讨[C]//滑坡文集(第2集).北京:人民铁道出版社,1979:127-132.
[6]Zhou Bengang,Zhang Yuming.Some characteristics of earthquake-induced landslide in southwestern China[J].Northwestern Seismolog-ical Journal,1994,16(1):95-103.
[7]辛鸿博,王余庆.岩土边坡地震崩滑及其初判准[J].岩土工程学报,1999,21(5):591-594.
[8]王兰民,等.黄土动力学[M].北京:地震出版社,2003.
[9]Wilson R C,Keefer D K.Dynamic analysis of a slope failure fromthe 6 August 1979 Coyote Lake,California,Earthquake[J].Bulletin ofthe Seismological Society of America,1983,73(3):863-877.
[10]Wilson R C,Keefer D K.Predicting Areal Limits of Earthquake-induced Landsliding[C]//Ziony J I.Evaluating Earthquakes Hazardsin the Los Angeles Region—an Earth-Science Perspective,US Ge-ological Survey Professional Paper 1360.Washington,United States:U.S.G.P.O,1985:317-345.
[11]Harp E L,Wilson R C.Shaking intensity thresholds for rock fallsand slides:Evidence from 1987 Whittier narrows and superstitionHilss Earthquake strong-motion records[J].Bulletin of the Seismo-logical Society of America,1995,85(6):1739-1757.
[12]胡聿贤,等.地震工程学(第二版)[M].北京:地震出版社,2006.
[13]徐锡伟,闻学泽,叶建青,等.汶川Ms 8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597-629.
[14]LI Xiaojun,ZHOU Zhenghua,YU Haiying,et al.Strong motionobservations and recordings from the great Wenchuan Erthquake[J].Earthquake Engineering and Engineering Vibration,2008,7(3):235-246.
[15]于海英,王栋,杨永强,等.汶川8.0级地震强震动特征初步分析[J].震灾防御技术,2008,3(4):321-336.
[16]周朝晖.2008年四川汶川8.0级地震强震动台网观测记录[J].四川地震,2008,(4):25-29.
①国土资源部地质环境监测院.“5.12”汶川地震区地质灾害防治区划图.2008.
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