|
|
|
| ANALYSIS OF RELATIONSHIP BETWEEN DEFORMATION ENERGY RELEASE OF SLOPE WHILE LOCKED SLOPE BRINGING UP REAR SHEARING AND STARTING VELOCITY OF LANDSLIDE BODY |
| PAN Yue，LI Aiwu |
| (College of Civil Engineering，Qingdao Technological University，Qingdao，Shandong 266520，China) |
|
|
|
|
Abstract The energy analysis for the stress field and displacement field of the locked slope body indicates that：in the case that the thickness of locked slope body bring up the rear is large and the slope body consists of solid rock，enormous shear deformation energy accumulates in the slope system under the action of huge thrust of middle and rear slope body，which makes that the shear deformation energy released by the slope system far exceeds the energy for failure of rock body of latent slide belt in the critical slide and sheared locked slope body. The superfluous deformation energy converts into kinetic energy of slide body in impulse condition，which leads to an acute-moving landslide. The curve of shear deformation energy change rate of locked slope body and its expression，which contains an abundance of information，are deduced. Through the shear deformation energy change rate curve and the load-deformation curve of latent slide belt of locked slope body bring up the rear，the shear deformation energy accumulation of the slope system and the relationship between the deformation energy releasing amount in critical slide and the starting impulse velocity of the landslide body are described in the forms of direct geometry way；and a calculating example about the impulse velocity of the acute-moving landslide is given.
|
|
Received: 21 January 2011
|
|
|
|
| [1] 胡广韬. 滑坡动力学[M]. 北京：地质出版社，1995，78.(HU Guangtao，Landslide dynamics[M]. Beijing：Geology Press，1995，78.(in Chinese))
[2] HABIB P. Production of gaseous pore pressure during rockslides[J]. Rock Mechanics and Rock Engineering，1975，8(7)：193–197.
[3] MASCH L. Frictional fusion on the gliding planes of two large landslides[C]// Proceedings of the 26th International Geological Congress，Section 17：Geologic Hazards Earth Movements. Janvie：[s.n.]，1981：37–56.
[4] SASSA K. Geotechnical model for the motion of landslides[C]// Proceedings of the 5th International Symposium on Landslides. Rotterdam：A. A. Balkema，1981：37–56.
[5] 唐 川. 昭通头寨沟特大型灾害性滑坡研究[J]. 云南地理环境研究，1991，3(2)：64–70.(TANG Chuan. A study on large-scale catastrophic landslide at Touzhai Gully of Zhaotong[J]. Yunnan Geographic Environment Research，1991，3(2)：64–70.(in Chinese))
[6] 谭继中. 云南头寨沟大型高速滑波运动特征探讨[J]. 地质灾害与环境保护，1993，4(1)：37–44.(Tan Jizhong. Exploration on movement mechanism of large-scale landslide at Touzhai Gully of Yunnan[J]. Geological Hazards and Environment Preservation，1993，4(1)：37–44.(in Chinese))
[7] 邢爱国，陈龙珠，陈明中. 岩石力学特性分析与高速滑坡启动速度预测[J]. 岩石力学与工程学报，2004，23(8)：1 654–1 657. (XING Aiguo，CHEN Longzhu，CHEN Mingzhong. Analysis of mechanical properties of rock and prediction of muzzle velocity of high-speed landslide[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(8)：1 654–1 657.(in Chinese))
[8] SCHEIDDGER A E. On the prediction of reaching and velocity of catastrophic landslides[J]. Rock Mechanics and Rock Engineering，1973，4(5)：231–236.
[9] 胡厚田，杨 明. 头寨沟大型高速远程滑坡启程流体动力学机制的分析研究[J]. 工程地质学报，2000，8(增)：85–89.(HU Houtian，YANG Ming. Analytical study of hydrodynamics mechanism of large high-speed landslide of Touzhai Gully in the set-out stage[J]. Journal of Engineering Geology，2000，8(Supp.)：85–89.(in Chinese))
[10] 程谦恭，胡厚田，胡广韬，等. 高速岩质滑坡临床弹冲与峰残强降复合启程加速动力学机制[J]. 岩石力学与工程学报，2000，19(3)：173–176.(CHENG Qiangong，HU Houtian，HU Guangtao，et al. A study of complex accelerated dynamics mechanism of highspeed landslide by elastic rocky impulse and peak-residual strength drop[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(3)：173–176.(in Chinese))
[11] 邢爱国，殷跃平. 云南头寨滑坡全程流体动力学机制分析[J]. 同济大学学报，2009，37(4)：481–485.(XING Aiguo. Whole course analysis of hydrokinetics mechanism of Touzhai Gully Landslide[J]. Journal of Tongji University，2009，37(4)：481–485.(in Chinese))
[12] 王治华. 大型个体滑坡遥感调查[J]. 地学前缘，2006，13(5)：516–523.(WANG Zhihua. Large scale individual landslide remote sensing[J]. Earth Science Frontiers，2006，13(5)：516–523.(in Chinese))
[13] 陈禄俊，邢爱国，陈龙珠，等. 高速远程滑坡飞行数值分析[J]. 水文地质工程地质，2008，35(5)：1–6.(CHEN Lujun，XING Aiguo，CHEN Longzhu，et al，Numerical analysis of the flying of high speed and long runout landslide[J]. Hydrogeology and Engineering Geology，2008，35(5)：1–6.(in Chinese))
[14] KARCINOVIC D. Statistical aspects of the continuous damage theory[J]. International Journal of Solids and Structures，1982，18(3)：551–562. |
|
|
|
2011, Vol. 30 
