崩滑体动力学机理分析及全过程速度计算——以四川省汉源县“8·6”大型崩塌滑坡为例
|
摘要
"5.12"汶川特大地震破坏性强,影响范围广,在地震区造成了大量的滚石、崩塌、滑坡、泥石流等次生山地灾害。汉源县是汶川8.0级大地震Ⅵ度烈度区内唯一的Ⅷ度异常区,是十分典型的远震烈度异常区,由于地震导致山体松动,因而触发了大量的崩塌、滑坡。以2009年8月6日四川省汉源县顺河乡境内猴子岩发生的大型崩塌滑坡为例,将滑坡划分成起动、运动、撞击3个阶段,根据大渡河堰塞坝的形成过程,运用滑坡几何学、滑坡运动学理论,论述了汉源高位山体崩滑的形成及机理;基于岩质滑坡动力学、能量平衡原理,分析了岩质山体崩塌滑坡的运动规律,并对各阶段的岩体介质速度进行了计算。计算结果表明:猴子岩崩滑全过程中,崩滑体运动速度呈先增大后减小的趋势,行程运动阶段的速度高于起动速度和撞击后速度。研究结果可为水库的设计及涌浪高度的确定提供基本参数,同时为边坡失稳及堰塞湖的防治提供理论依据。
Taking the large-scale landslide in Houzi Yan occurred at Hanyuan County on August 6th,2009 as a Sample,the landslide was divided into three stages,which were staring period,movement period and collision peri-od.According to the formation process of barrier dam of Dadu River,using landslide geometry and landslide kine-matic theory,the formation and mechanism of Hanyuan mountain landslide were discussed.Based on dynamic landslide and energy balance principle,the motion law of the rock mountain landslide was analyzed,and the speeds at the various stages were calculated.The results showed that the speed of sliding mass firstly increases and then decreases during full course movements of Houziyan Landslide,movement velocity is higher than the speed at the starting period and after.
Taking the large-scale landslide in Houzi Yan occurred at Hanyuan County on August 6th,2009 as a Sample,the landslide was divided into three stages,which were staring period,movement period and collision peri-od.According to the formation process of barrier dam of Dadu River,using landslide geometry and landslide kine-matic theory,the formation and mechanism of Hanyuan mountain landslide were discussed.Based on dynamic landslide and energy balance principle,the motion law of the rock mountain landslide was analyzed,and the speeds at the various stages were calculated.The results showed that the speed of sliding mass firstly increases and then decreases during full course movements of Houziyan Landslide,movement velocity is higher than the speed at the starting period and after.
引文
[1]Cui Peng,Han Yongshun,Chen Xiaoqing.Distribution andrisk anaysis of dammed lakes reduced by Wenchuan Earth-quake[J].Journal of Sichuan University:Engineering Sci-ence Edition2,0094,1(3):35-42.[崔鹏,韩用顺,陈晓清.汶川地震堰塞湖分布规律与风险评估[J].四川大学学报:工程科学版2,009,41(3):35-42.]
[2]Cui Peng,Ling Yongming.Influences of natural and engi-neering factors on formation of debris flow and landslide a-long mountainous roads[J].Jounal of Catastrophology,2007,22(3):11-16.[崔鹏,林勇明.自然因素与工程作用对山区道路泥石流、滑坡形成的影响[J].灾害学,2007,22(3):11-16.]
[3]胡广韬.滑坡动力学[M].北京:地质出版社,1995.
[4]程谦恭,彭建兵,胡广韬,等.高速岩质滑坡动力学[M].成都:西南交通大学出版社,1999.
[5]Scheidegger A E.On the prediction of the reach and veloci-ty of catastrophic landslides[J].Rock Mech D C,1973,(5):231-236.
[6]Banold R A.The flow of cohesionless grains in fluids[J].Proc R Soc Lond:Ser A1,956,249:235-297.
[7]Lu Wannian.Airo-dynamic approach to sliding problems ofhigh landslide[J].Journal of Xi’an College of Geology,1991,13(4):77-85.[卢万年.用空气动力学分析坡体高速滑坡的滑行问题[J].西安地质学院学报,1991,13(4):77-85.]
[8]Liao Xiaoping,Xu Junling,Zheng Jing,et al.Mechanicalanalysis and movement simulation for high speed and longdistance landslide[J].1993,4(2):26-30.[廖小平,徐峻龄,郑静,等.高速远程滑坡的动力特征和运动模拟[J].中国地质灾害与防治学报.1993,4(2):26-30.]
[9]Cheng Qiangong,Hu Houtian.Dynamical analysis on thewhole process of acute colliding high speed landslide[J].Hydrogeology and Engineering Geology,1999(4):19-23.[程谦恭,胡厚田.剧冲式高速滑坡全程动力学机理分析[J].水文地质工程地质,1999(4):19-23.]
[10]胡厚田,刘涌江,邢爱国,等.高速远程滑坡流体动力学理论的研究[M].成都:西南交通大学出版社2,003.
[11]刘涌江.大型高速岩质滑坡流体化理论研究[D].成都:西南交通大学,2003.
[12]Yang Qinghua,Yao Lingkan,Yang Ming.Particle flow nu-merical simulation of landslip of loose slope under seismicloading[J].Journal of Southwest Jiaotong Univ,2009,44(4):580-584.[杨庆华,姚令侃,杨明.地震作用下松散堆积体崩塌的颗粒流数值模拟[J].西南交通大学学报2,009,44(4):580-584.]
[13]Ge Yonggang,Chen Xingchang,Fang Hua,et al.Studyon the disaster of dadu river block induced by the rock falloccurred at hanyuan county on August 6th,2009[J].Jour-nal of Mountain Science.2010,28(1):123-12[葛永刚,陈兴长,方华,等.汉源县大渡河“8.6”崩塌堵河灾害研究[J].山地学报.2010,28(1):123-12.]
[14]Huang Runqiu,Wang Yunsheng,Dong Xiujun.The 6thAugust 2009 field urgent investigation on the geo-hazard ofthe rock fall damming in Houziyan,Shunhe,Hanyuan,Si-chuan[J].Journal of Engineering Geology,2009,17(4):445-448.[黄润秋,王运生,董秀军.2009年8.6四川汉源猴子岩崩滑的现场应急调查及危岩处理[J].工程地质学报2,009,17(4):445-448.]
[15]水利水电科学研究院,水利水电规划设计总院,水利电力情报研究所,水利水电岩石力学与工程情报网.岩石力学参数手册[M].北京:水利电力出版社1,991.
[2]Cui Peng,Ling Yongming.Influences of natural and engi-neering factors on formation of debris flow and landslide a-long mountainous roads[J].Jounal of Catastrophology,2007,22(3):11-16.[崔鹏,林勇明.自然因素与工程作用对山区道路泥石流、滑坡形成的影响[J].灾害学,2007,22(3):11-16.]
[3]胡广韬.滑坡动力学[M].北京:地质出版社,1995.
[4]程谦恭,彭建兵,胡广韬,等.高速岩质滑坡动力学[M].成都:西南交通大学出版社,1999.
[5]Scheidegger A E.On the prediction of the reach and veloci-ty of catastrophic landslides[J].Rock Mech D C,1973,(5):231-236.
[6]Banold R A.The flow of cohesionless grains in fluids[J].Proc R Soc Lond:Ser A1,956,249:235-297.
[7]Lu Wannian.Airo-dynamic approach to sliding problems ofhigh landslide[J].Journal of Xi’an College of Geology,1991,13(4):77-85.[卢万年.用空气动力学分析坡体高速滑坡的滑行问题[J].西安地质学院学报,1991,13(4):77-85.]
[8]Liao Xiaoping,Xu Junling,Zheng Jing,et al.Mechanicalanalysis and movement simulation for high speed and longdistance landslide[J].1993,4(2):26-30.[廖小平,徐峻龄,郑静,等.高速远程滑坡的动力特征和运动模拟[J].中国地质灾害与防治学报.1993,4(2):26-30.]
[9]Cheng Qiangong,Hu Houtian.Dynamical analysis on thewhole process of acute colliding high speed landslide[J].Hydrogeology and Engineering Geology,1999(4):19-23.[程谦恭,胡厚田.剧冲式高速滑坡全程动力学机理分析[J].水文地质工程地质,1999(4):19-23.]
[10]胡厚田,刘涌江,邢爱国,等.高速远程滑坡流体动力学理论的研究[M].成都:西南交通大学出版社2,003.
[11]刘涌江.大型高速岩质滑坡流体化理论研究[D].成都:西南交通大学,2003.
[12]Yang Qinghua,Yao Lingkan,Yang Ming.Particle flow nu-merical simulation of landslip of loose slope under seismicloading[J].Journal of Southwest Jiaotong Univ,2009,44(4):580-584.[杨庆华,姚令侃,杨明.地震作用下松散堆积体崩塌的颗粒流数值模拟[J].西南交通大学学报2,009,44(4):580-584.]
[13]Ge Yonggang,Chen Xingchang,Fang Hua,et al.Studyon the disaster of dadu river block induced by the rock falloccurred at hanyuan county on August 6th,2009[J].Jour-nal of Mountain Science.2010,28(1):123-12[葛永刚,陈兴长,方华,等.汉源县大渡河“8.6”崩塌堵河灾害研究[J].山地学报.2010,28(1):123-12.]
[14]Huang Runqiu,Wang Yunsheng,Dong Xiujun.The 6thAugust 2009 field urgent investigation on the geo-hazard ofthe rock fall damming in Houziyan,Shunhe,Hanyuan,Si-chuan[J].Journal of Engineering Geology,2009,17(4):445-448.[黄润秋,王运生,董秀军.2009年8.6四川汉源猴子岩崩滑的现场应急调查及危岩处理[J].工程地质学报2,009,17(4):445-448.]
[15]水利水电科学研究院,水利水电规划设计总院,水利电力情报研究所,水利水电岩石力学与工程情报网.岩石力学参数手册[M].北京:水利电力出版社1,991.
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