地震碎裂滑动型滑坡发育特点及典型实例分析
|
摘要
汶川地震诱发了大量的地震滑坡,其中地震碎裂滑动型滑坡是一种普遍的地震滑坡类型,滑动特征独特,动力机制复杂。以汶川县映秀镇牛圈沟滑坡为典型实例,从发育碎裂滑动的地貌、岩性、斜坡结构、地震作用等关键控制因素出发,阐释了牛圈沟滑坡的"滑动启动-碰撞碎裂-碎屑滑动-堆积停滞"4个阶段碎裂滑动中的7次折向过程,应用"地震启动-碎裂-加速"机理能够很好的解释地震滑坡超高速、滑程远、规模大的特点,具有一定的典型性和学科意义。
A large number of seismic landslides have been induced by Wenchuan Earthquake,among which a universal seismic landslide type was fragmentation-sliding seismic landslide,with the unique sliding characteristics and complexity of power mechanism.In order to study the development characteristics of this kind of seismic landslide,Niujuan Ditch seismic landslide in Yingxiu of Wenchuan County was used as a typical example.Initially,the critical control factors of the formation for the fragmentation-sliding such as landforms,litho logy,slope structure,the role of seismic were studied.Then a detailed interpretation of the process of fragmentation-sliding with four stages and 7 turning points of the direction—"slide to start-collision fragments-debris slide-the accumulation of stagnant" were given.The application of the mechanism—"seismic start-fragmentation-accelerating" has an efficient explanation for why there are features of ultra-high-speed,slip away-way,large-scale for seismic landslide,which will be a typical and academic significance.
A large number of seismic landslides have been induced by Wenchuan Earthquake,among which a universal seismic landslide type was fragmentation-sliding seismic landslide,with the unique sliding characteristics and complexity of power mechanism.In order to study the development characteristics of this kind of seismic landslide,Niujuan Ditch seismic landslide in Yingxiu of Wenchuan County was used as a typical example.Initially,the critical control factors of the formation for the fragmentation-sliding such as landforms,litho logy,slope structure,the role of seismic were studied.Then a detailed interpretation of the process of fragmentation-sliding with four stages and 7 turning points of the direction—"slide to start-collision fragments-debris slide-the accumulation of stagnant" were given.The application of the mechanism—"seismic start-fragmentation-accelerating" has an efficient explanation for why there are features of ultra-high-speed,slip away-way,large-scale for seismic landslide,which will be a typical and academic significance.
引文
[1]Romeo R.Seismically induced landslide displacements:apredictive model[J].Engineering Geology,2000,58(3-4):337-351.
[2]Papadopoulos G A,Plessa A.Magnitude-distance relationsfor earthquake-induced landslide in Greece[J].Engineer-ing Geology,2000,58(3-4):377-386.
[3]Kong Jiming.The non-computation method to differentiatethe stability of slope[J].Journal of Mountain Science,2001,19(5):446-451.[孔纪名.滑坡稳定性判别的非计算方法[J].山地学报,2001,19(5):446-451.]
[4]Huang Jianliang,Wang Weizhong,Xue Hongjiao.Dynamic a-nalysis of seismic stability of slopes[J].Earthquake Engineer-ing and Engineering Vibration,1997,17(4):113-122.[黄建梁,王威中,薛宏交.坡体地震稳定性的动态分析[J].地震工程与工程震动,1997,17(4):113-122.]
[5]Deng Qidong.Active tectonics in China[J].Geological Re-view,1996,42(4):295-299.[邓起东.中国活动构造研究[J].地质论评,1996,42(4):295-299.]
[6]胡正纲.四川省区域地质志[M].成都:四川科学技术出版社,1998:210-211.
[7]Huang Runqiu,Li Weile.Research on development anddistribution rules of geohazards induced by WenchuanEarthquake on 12th May,2008[J].Chinese Journal ofRock Mechanics and Engineering,2008,27(12):2585-2592.[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.]
[8]Wang Yunsheng,Luo Yonghong,Ji Fen.Analysis of thecontrolling factors on geohazards in mountainous epiceenterzones of the Wenchuan earthquake[J].Journal of Engi-neering Geology,2008,16(6):759-763.[王运生,罗永红,吉峰.汶川大地震山地灾害发育的控制因素分析[J].工程地质学报,2008,16(6):759-763.]
[9]Chen Yuntai.On the magnitude and the fault length of thegreat Wenchuan earthquake[J].Science and Technology Re-view,2008,26(10):26-27.[陈运泰.汶川特大地震的震级和断层长度[J].科技导报,2008,26(10):26-27.]
[10]Xu Xiwei,Wen Xueze,Ye Jianqing.The Ms8.0 Wenchuanearthquake surface ruptures and its seismogenic structure[J].Seismology and Geology,2008,30(3):597-629.[徐锡伟,闻学泽,叶建青.汶川Ms8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597-629.]
[11]Zhou Zhaohui.The strong ground motion recordings of theMs8.0 Wenchuan Earthquake in Sichuan Province[J].Earth-quake Research in Sichuan,2008(04):25-29.[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(04):25-29.]
[2]Papadopoulos G A,Plessa A.Magnitude-distance relationsfor earthquake-induced landslide in Greece[J].Engineer-ing Geology,2000,58(3-4):377-386.
[3]Kong Jiming.The non-computation method to differentiatethe stability of slope[J].Journal of Mountain Science,2001,19(5):446-451.[孔纪名.滑坡稳定性判别的非计算方法[J].山地学报,2001,19(5):446-451.]
[4]Huang Jianliang,Wang Weizhong,Xue Hongjiao.Dynamic a-nalysis of seismic stability of slopes[J].Earthquake Engineer-ing and Engineering Vibration,1997,17(4):113-122.[黄建梁,王威中,薛宏交.坡体地震稳定性的动态分析[J].地震工程与工程震动,1997,17(4):113-122.]
[5]Deng Qidong.Active tectonics in China[J].Geological Re-view,1996,42(4):295-299.[邓起东.中国活动构造研究[J].地质论评,1996,42(4):295-299.]
[6]胡正纲.四川省区域地质志[M].成都:四川科学技术出版社,1998:210-211.
[7]Huang Runqiu,Li Weile.Research on development anddistribution rules of geohazards induced by WenchuanEarthquake on 12th May,2008[J].Chinese Journal ofRock Mechanics and Engineering,2008,27(12):2585-2592.[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.]
[8]Wang Yunsheng,Luo Yonghong,Ji Fen.Analysis of thecontrolling factors on geohazards in mountainous epiceenterzones of the Wenchuan earthquake[J].Journal of Engi-neering Geology,2008,16(6):759-763.[王运生,罗永红,吉峰.汶川大地震山地灾害发育的控制因素分析[J].工程地质学报,2008,16(6):759-763.]
[9]Chen Yuntai.On the magnitude and the fault length of thegreat Wenchuan earthquake[J].Science and Technology Re-view,2008,26(10):26-27.[陈运泰.汶川特大地震的震级和断层长度[J].科技导报,2008,26(10):26-27.]
[10]Xu Xiwei,Wen Xueze,Ye Jianqing.The Ms8.0 Wenchuanearthquake surface ruptures and its seismogenic structure[J].Seismology and Geology,2008,30(3):597-629.[徐锡伟,闻学泽,叶建青.汶川Ms8.0地震地表破裂带及其发震构造[J].地震地质,2008,30(3):597-629.]
[11]Zhou Zhaohui.The strong ground motion recordings of theMs8.0 Wenchuan Earthquake in Sichuan Province[J].Earth-quake Research in Sichuan,2008(04):25-29.[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(04):25-29.]
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心