考虑竖向地震力的极震区滑坡稳定分析
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摘要
以"5.12"汶川8.0级特大地震为契机,对极震区内的地震动特点进行分析,结合极震区内滑坡的破坏特点,并运用剩余推力法对同时考虑水平向和竖直向地震力的滑坡进行算例分析。对竖向地震力与水平向地震力的大小、比值与滑坡稳定性的关系进行了分析。发现Kv与Kh的比值越大,坡体失稳的机率迅速增大,Kv与Kh的比值越小,稳定系数曲线的弯曲程度越大。在比值一定时,0.4g的水平地震力,成为稳定系数变化的关键点。在同时考虑水平向和竖向地震力的情况下,这些潜在滑坡的稳定性受控于这两种地震力的大小和比值。
On the basis of analyzing the ground motion and the character of landslide failure at meizoseismal area,the example of landslide with horizontal and vertical super earthquake inertia forces was calculated using residual thrust method.The relationship between landslide safety and size、ratio of vertical and horizontal super earthquake inertia forces were analysized.The failure of landslide will be more easier,when the radio of Kv and Kh becomes larger.The change of landslide safety coefficient curve is reverse to the radio of Kv and Kh.When the horizontal earthquake inertia force is 0.4 g,that is the sticking point of safety coefficient curve.So the safety of landslides are controlled by the size and radio of the two kinds of earthquake inertia forces.
On the basis of analyzing the ground motion and the character of landslide failure at meizoseismal area,the example of landslide with horizontal and vertical super earthquake inertia forces was calculated using residual thrust method.The relationship between landslide safety and size、ratio of vertical and horizontal super earthquake inertia forces were analysized.The failure of landslide will be more easier,when the radio of Kv and Kh becomes larger.The change of landslide safety coefficient curve is reverse to the radio of Kv and Kh.When the horizontal earthquake inertia force is 0.4 g,that is the sticking point of safety coefficient curve.So the safety of landslides are controlled by the size and radio of the two kinds of earthquake inertia forces.
引文
[1]Li Zhongsheng.The state of the art of the research on seis-mic landslide hazard at home and abroad[J].Journal ofCatastrophology,2003,18(4):64-70.[李忠生.国内外地震滑坡灾害研究综述[J].灾害学,2003,18(4):64-70.]
[2]Mao Yanlong,Hu Guangtao,Zhao Suofa,et al.Mechanismof landslide during Earthquake[J].Journal of Xi’an Engi-neering University,1998,20(4):45-48.[毛彦龙,胡广韬,赵法锁等.地震动触发滑坡体滑动的机理[J].西安工程学院学报,1998,20(4):45-48.]
[3]Li Tianchi.The relationship of Earthquake and landslideand the discussion of Earthquake landslide forecasting[C]//Landslide Memoirs(the second).Beijing:The PeopleRailway Publishing House,1979:127-132.[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(第二集).北京:人民铁道出版社,1979:127-132.]
[4]Steven L Kramer.Geotechnical Earthquake Engineering[M].New Jersey:Prentice—Hall lnc.,U.S.A,1996.
[5]Qi Shengwen,Wu Faquan,Liu Chunling,et al.Engineer-ing geology analysis on stability of slope under Earthquake[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2792-2797.[祁生文,伍法权,刘春玲,等.地震边坡稳定性的工程地质分析[J].岩石力学与工程学报,2004,23(16):2792-2797.]
[6]Han Wenfeng,Song Chang,Liang Qingguo.Strong groundmotion at meizoseismal area&safety of important engineer-ing projects at potential Earthquake region[J].Journal ofEngineering Geology,2004,12(4):346-353.[韩文峰,宋畅,梁庆国.极震区的地震动与潜在震源区内重大工程安全[J].工程地质学报,2004,12(4):346-353.]
[7]Wang Guoquan,Zhou Xiyuan.The randomness of near faultacceleration time history of the 1999 Chi-Chi,Taiwan,Chi-na,Earthquake[J].Journal of Disaster Prevention and Miti-gation Engineering,2003,23(4):10-18.[王国权,周锡元.台湾集集地震近断层强地面运动加速度时程的随机特性[J].防灾减灾工程学报,2003,23(4):10-18.]
[8]Wang Yayong,Liu Xiaodi.The character research of thestrong ground motion on lanchang-gengma[J].EarthquakeEngineering and Engineering Vibration,1991,11(2):11-19.[王亚勇,刘小弟.澜沧—耿马强震地面运动特征研究[J].地震工程与工程振动,1991,11(2):11-19.]
[9]Zhou Zhenghua,Zhou Yongnian,Lu Tao,et al.Study oncharacteristics of vertical ground motion[J].EarthquakeEngineering and Engineering Vibration,2003,23(3):25-29.[周正华,周雍年,卢滔,等.竖向地震动特征研究[J].地震工程与工程振动,2003,23(3):25-29.]
[10]Tong Liqiang.Emergency remote sensing investigation ofbarrier lakes at the quake center area caused by“5.12”Wenchuan Strong Earthquake[J].Remote Sensing ForLand&Resources,2008,3:61-63.[童立强.“5.12”汶川大地震极重灾区地震堰塞湖应急遥感调查[J].国土资源遥感,2008,3:61-63.]
[11]Li Haiguang.The design of new type braced structure andengineering examples[C].Beijing:China CommunicationsPress,2004:48-50[李海光.新型支挡结构设计与工程实例[C].北京:人民交通出版社,2004:48-50.]
[2]Mao Yanlong,Hu Guangtao,Zhao Suofa,et al.Mechanismof landslide during Earthquake[J].Journal of Xi’an Engi-neering University,1998,20(4):45-48.[毛彦龙,胡广韬,赵法锁等.地震动触发滑坡体滑动的机理[J].西安工程学院学报,1998,20(4):45-48.]
[3]Li Tianchi.The relationship of Earthquake and landslideand the discussion of Earthquake landslide forecasting[C]//Landslide Memoirs(the second).Beijing:The PeopleRailway Publishing House,1979:127-132.[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(第二集).北京:人民铁道出版社,1979:127-132.]
[4]Steven L Kramer.Geotechnical Earthquake Engineering[M].New Jersey:Prentice—Hall lnc.,U.S.A,1996.
[5]Qi Shengwen,Wu Faquan,Liu Chunling,et al.Engineer-ing geology analysis on stability of slope under Earthquake[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2792-2797.[祁生文,伍法权,刘春玲,等.地震边坡稳定性的工程地质分析[J].岩石力学与工程学报,2004,23(16):2792-2797.]
[6]Han Wenfeng,Song Chang,Liang Qingguo.Strong groundmotion at meizoseismal area&safety of important engineer-ing projects at potential Earthquake region[J].Journal ofEngineering Geology,2004,12(4):346-353.[韩文峰,宋畅,梁庆国.极震区的地震动与潜在震源区内重大工程安全[J].工程地质学报,2004,12(4):346-353.]
[7]Wang Guoquan,Zhou Xiyuan.The randomness of near faultacceleration time history of the 1999 Chi-Chi,Taiwan,Chi-na,Earthquake[J].Journal of Disaster Prevention and Miti-gation Engineering,2003,23(4):10-18.[王国权,周锡元.台湾集集地震近断层强地面运动加速度时程的随机特性[J].防灾减灾工程学报,2003,23(4):10-18.]
[8]Wang Yayong,Liu Xiaodi.The character research of thestrong ground motion on lanchang-gengma[J].EarthquakeEngineering and Engineering Vibration,1991,11(2):11-19.[王亚勇,刘小弟.澜沧—耿马强震地面运动特征研究[J].地震工程与工程振动,1991,11(2):11-19.]
[9]Zhou Zhenghua,Zhou Yongnian,Lu Tao,et al.Study oncharacteristics of vertical ground motion[J].EarthquakeEngineering and Engineering Vibration,2003,23(3):25-29.[周正华,周雍年,卢滔,等.竖向地震动特征研究[J].地震工程与工程振动,2003,23(3):25-29.]
[10]Tong Liqiang.Emergency remote sensing investigation ofbarrier lakes at the quake center area caused by“5.12”Wenchuan Strong Earthquake[J].Remote Sensing ForLand&Resources,2008,3:61-63.[童立强.“5.12”汶川大地震极重灾区地震堰塞湖应急遥感调查[J].国土资源遥感,2008,3:61-63.]
[11]Li Haiguang.The design of new type braced structure andengineering examples[C].Beijing:China CommunicationsPress,2004:48-50[李海光.新型支挡结构设计与工程实例[C].北京:人民交通出版社,2004:48-50.]
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