On Air Cushion Effect of the Mass Avalanches

doi:10.3969/j.issn.1674-0696.2011.05.021

Abstract

Abstract: The mass landslip takes rapidity and destructive characteristics． Without taking the function of air into accout， studied by free fall for a long time，it could lead to errors for the prevention and control of the landslip． The model of vertical drop collapse body was established; a more accurate quantitative analysis method for analyzing the practical issue and estimating disasters was obtained，which was proposed by considering the speed of collapse body reached gully after the air affect and closed air volume． By considering the role of air to collapse body，the air out releasing coefficient was calculated through the theory derivation and numerical calculation method．

Key words: landslip, air cushion effect, speed, air

摘要： 群发性崩塌具有速度大，破坏性的特点，一直以来都是按照自由落体进行研究，忽略空气的作用，这对群发性崩塌的预防和防治带来了误差。建立崩塌体垂直下落的模型，考虑空气对崩塌体的作用，通过理论推导，数值计算的方法，考虑空气外泄系数，应用空气动力学理论分析崩塌体在空气中的运动，从而得到在考虑空气效应后崩塌体到达沟谷的速度，以及封闭的空气体积。

关键词: 崩塌, 气垫效应, 速度, 空气

CLC Number:

P642.21，O355

LI Qing-shan，TANG Hong-mei，CHEN Hong-kai. On Air Cushion Effect of the Mass Avalanches[J]. Journal of Chongqing Jiaotong University(Natural Science), 2011, 30(5): 983-988.

李清山，唐红梅，陈洪凯. 群发性崩塌气垫效应研究[J]. 重庆交通大学学报（自然科学版）, 2011, 30(5): 983-988.

References

[1]Jackson J A.Glossary of Geology(Fourth Edition)[M].Virgini-a:American Geological Institute,1997:556-557.
[2]Crandell D R.Miller C D,Glicken H X.Catastrophic debris ava-lanche on ancestral Mount Shasta volcano,California[J].Geology,1984,12:143-146.
[3]陈洪凯,鲜学福,唐红梅.石质山区崩塌灾害形成机制——以四面山国家级风景名胜区红岩石为例[J].西川大学学报,2010,42(3):1-6.
CHEN Hong-kai,XIAN Xue-fu,TANG Hong-mei.Developingmechanism for collapse disaster in rocky mountain area-taking Mt.Hongy-an in the national scenic spots of simianschan as an example[J].Journal of Sichuan University,2010,42(3):1-6.
[4]王林峰,陈洪凯.危岩链式规律的力学演绎[J].重庆建筑大学学报,2008,30(2):94-97.
WANG Lin-feng,CHEN Hong-kai.Mechanical illation for chainedregularity of perilous rock[J].Journal of Chongqing Jianzhu Uni-versity,2008,30(2):94-97.
[5]Vardoulakis I.Dynamic thermo-poro-mechanical analysis of catas-trophic landslides[J].Geotechnique,2002,52(3):157-171.
[6]程谦恭,张卓元,黄润秋.高速远程崩滑动力学的研究现状及发展趋势[J].山地学报,2007,22(1):72-84.
CHENG Qian-gong,ZHANG Zhuo-yuan,HUANG Rui-qiu.Studyon dynamics of rock avalanches:state of the art report[J].Journalof Mountain Science,2007,22(1):72-84.
[7]Foda M A.Landslides riding on basal pressure waves[J].Contin-uum Mechanics and thermodynamics,1994,6:61-79.
[8]Kobayashi Y.Long runout landslides riding on a basal guided wave[C]//Engineering Geology and the Environment.Rotterdam:A.A.Balkema,1997:761-766.
[9]Zhang D,Foda M A.An in stability mechanism for the sliding mo-tion of finite depth of bulk granular materials[J].Acta Mechani-ca,1997,121:1-19.
[10]Chen H K,Tang H M,Ye S Q.Damage model of control fissurein perilous rock[J].Applied Mathematics and Mechanics:EnglishEdition,2006,27(7):967-974.
[11]Chen H K,Tang H M.Method to calculation fatigue fracture lifeof control fissure[J].Applied Mathematics and Mechanics:Eng-lish Edition,2007,28(5):643-649
[12]陈洪凯,唐红梅,王蓉.三峡库区危岩稳定性计算方法及应用[J].岩石力学与工程学报,2004,23(4):614-619.
CHEN Hong-kai,TANG Hong-mei,WANG Rong.Calculationmethod of stability for unstable rock and application to the threegorges reservoir[J].Chinese Journal of Rock Mechanics and Engi-neering,2004,23(4):614-619.
[13]唐红梅,易朋莹.危岩落石运动路径研究[J].重庆建筑大学学报,2003,25(1):17-23.
TANG Hong-mei,YI Peng-ying.Research on dangerous rock move-ment route[J].Journal of Chongqing Jianzhu University,2003,25(1):17-23.
[14]刑爱国,殷跃平.云南头寨滑坡全程流体动力学机理分析[J].同济大学学报,2009,37(4):481-485.
XING Ai-guo,YIN Yue-ping.Whole course analysis on Hydroki-netics mechanism of Touzhai gully landslide[J].Journal of TongjiUniversity,2009,37(4):481-485.
[15]Manzella I,Labiouse V.Flow experiments with gravel and blocks atsmall scale to investigate parameters and mechanisms involved inrock avalanches[J].Engineering Geology,2009,109(1-2):146-158.
[16]Wieczorek G L,Snyder J B,Waitt R B.Unusual july10,1996,rockfall at happy isles,yosemite national park,california[J].Ge-ological Society of America Bulletin,2000,112(1):75-85.
[17]陈洪凯,唐红梅,王林峰,等.危岩崩塌演化理论及应用[M].北京:科技出版社,2009:231-237.
[18]胡广韬.滑坡动力学[M].北京:地质出版社,1995:16-22.
[19]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,1999:1-7.
[20]孙萍,张永双,殷跃平,等.东河口滑坡-碎屑流高速远程运移机制探讨[J].工程地质学报,2009,17(6):737-744.
SUN Ping,ZHANG Yong-shuang,YIN Yue-ping,et al.Discussionon long run-out sliding mechanism of donghekou landslide-debri sflow[J].Journal of Engineering Geoloty,2009,17(6):737-744.
[21]钱翼稷.空气动力学[M].北京:北京航空航天大学出版社,2004.