Mobility assessment model for landslide mass considering disintegration energy consumption in slipping process
WU Yue1, 2, LIU Dong-sheng1, ZHOU Zhong-hao1
1. Chongqing Bureau of Geology and Mineral Exploration, Chongqing 400391, China; 2. Department of Civil Engineering, Logistical Engineering University of PLA, Chongqing 401331, China
Abstract：The mobility assessment model for landslide mass can be used in calculating the speed, sliding distance, impact energy and affected area of landslide. It’s the key technology for risk assessment of landslide. In the conventional methods, the landslide mass is usually assumed as the mass point or rigid block, and the dynamic assessment process does not take the disintegration energy consumption into account. An assessment model for landslide mass in slipping process considering the disintegration energy consumption is proposed. In the model, the landslide mass is assumed as a system consisting of two mass points and a dashpot, and the slipping process is simplified as a deformation body in plan motion. Furthermore the stress-strain characteristics of landslide mass follow the rules of soil residual strength from repeated direct shear tests. The motion equations of the mobility assessment model and the relevant formula for calculating viscosity resistance force of the dashpot are established. The equation is used to deduce the formula for intensity indexes (including slipping velocity, impact energy and sliding distance). As a case study, a landslide project is analyzed to illustrate this mobility assessment model. The results show that the proposed model conforms to the energy transformation rules of landslide mass, and its results are closer to the reality than those of the conventional methods. It is more convenient than the numerical methods.
吴越, 刘东升, 周忠浩. 考虑滑动过程内部崩解耗散的滑坡体运动模型[J]. 岩土工程学报, 2015, 37(1): 35-46.
WU Yue, LIU Dong-sheng, ZHOU Zhong-hao. Mobility assessment model for landslide mass considering disintegration energy consumption in slipping process. Chinese J. Geot. Eng., 2015, 37(1): 35-46.
[1] AGS. A national landslide risk management framework for Australia, Australian geomechanics society[J]. Australian Geomechanics, 2007, 42(1): 1-12. [2] 黄润秋. 20世纪以来中国的大型滑坡及其发生机制[J]. 岩石力学与工程学报, 2007, 26(3): 434-453. (HUANG Run-qiu. Large-scale landslide and their sliding mechanisms in China since the 20th century[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(3): 434-453. (in Chinese)) [3] 吴越, 刘东升, 陆新, 等. 单体滑坡灾害财产风险定量评估模型[J]. 岩土力学, 2010, 31(增刊2): 342-348. (WU Yue, LIU Dong-sheng, LU Xing, et al. A quantitative assessment model for property risk caused by single landslide[J]. Rock and Soil Mechanics, 2010, 31(S2): 342-348. (in Chinese)) [4] 吴越, 刘东升, 陆新, 等. 承灾体易损性评估模型与滑坡灾害风险度指标[J]. 岩土力学, 2011, 32(8): 2487-2493. (WU Yue, LIU Dong-sheng, LU Xing, et al. Vulnerability assessment model for hazard bearing body and landslide risk index[J]. Rock and Soil Mechanics, 2011, 32(8): 2487-2493. (in Chinese)) [5] 吴越, 刘东升, 陆新, 等. 基于功-能关系的滑坡典型受灾体易损性评估模型[J]. 岩石力学与工程学报, 2011, 30(增刊1): 2946-2953. (WU Yue, LIU Dong-sheng, LU Xing, et al. A quantitative vulnerability assessment model for typical element at landslide risk based on work-energy transformation[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(S1): 2946-2953. (in Chinese)) [6] 吴越, 刘东升, 陆新, 等. 滑坡灾害典型受灾体失效概率计算方法及应用[J]. 土木建筑与环境工程, 2011, 33(2): 46-51. (WU Yue, LIU Dong-sheng, LU Xing, et al. A calculation for failure probability of typical element at landslide risk[J]. Journal of Civil, Architectural & Environmental Engineering, 2011, 33(2): 46-51. (in Chinese)) [7] Francois Legros. The mobility of long-runout landslides[J]. Engineering Geology, 2002, 63: 301-331. [8] TANG Chao-lung, HU Jyr-ching, LIN Ming-lang. The Tsaoling landslide triggered by the Chi-Chi earthquake, Taiwan: Insights from a discrete element simulation[J]. Engineering Geology, 2009, 106: 1-19. [9] ASCH Th W J van, BEEK L P H Van, BOGAARD T A. Problems in predicting the mobility of slow-moving landslides[J]. Engineering Geology, 2007, 91: 46-55. [10] WU Jian-hong, TSAI Pai Hsiang. New dynamic procedure for back-calculating the shear strength parameters of large landslides[J]. Engineering Geology, 2011, 123: 129-147. [11] GAVAN Hunter, ROBIN Fell. Travel distance angle for “rapid” landslides in constructed and natural soil slopes[J]. Can Geotech J, 2003, 40: 1123-1141. [12] WU Jian-hong, CHEN Chun-hwa. Application of DDA to simulate characteristics of the Tsaoling landslide[J]. Computer and Geotechnics, 2011, 38: 741-750. [13] 王家鼎, 张倬元. 地震诱发高速黄土滑坡的机理研究[J]. 岩土工程学报, 1999, 21(6): 669-674. (WANG Jia-ding, ZHANG Zhuo-yuan. A study on the mechanism of high-speed loess landslide induced by earthquake[J]. Chinese Journal of Geotechnical Engineering, 1999, 21(6): 669-674. (in Chinese)) [14] 胡明鉴, 程谦恭, 汪发武. 易贡远程高速滑坡形成原因试验探索[J]. 岩石力学与工程学报, 2009, 28(1): 138-143. (HU Ming-jian, CHENG Qian-gong, WANG Fa-wu. Experimental study on formation of Yigong long-distance high-speed landslide[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(1): 138-143. (in Chinese)) [15] 张倬元, 王士天, 王兰生. 工程地质分析原理[M]. 北京:地质出版社, 1994: 338-339. (ZHUANG Zhuo-yuan, WANG Shi-tian, WANG Lan-sheng. Engineering geological analysis principle[M]. Beijing: Geological Publishing House, 1994: 338-339. (in Chinese)) [16] 潘家铮. 建筑物的抗滑稳定和滑坡分析[M]. 北京: 水利出版社, 1980: 120-129. (PAN Jia-zheng. Sliding stability analysis and landslide anti building[M]. Beijing: Water Conservancy Press, 1980: 120-129. (in Chinese)) [17] 胡厚田. 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, 2003: 105-145. (HU Hou-tian. Research on high speed and long distance landslide fluid dynamics theory[M]. Chengdu: Southwest Jiao Tong University Press, 2003: 105-145. (in Chinese)) [18] 程谦恭, 张倬元, 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, 25(1): 72-84. (CHENG Qian-gong, ZHANG Zhuo-yuan, HANG Run-qiu. Study on dynamics of rock avalanches: state of the art report[J]. Journal of Mountain Science, 2007, 25(1): 72-84. (in Chinese)) [19] 吴越, 刘东升, 李明军. 岩体滑坡冲击能计算及受灾体易损性定量评估[J]. 岩石力学与工程学报, 2011, 30(5): 901-909. (WU Yue. LIU Dong-sheng. LI Ming-jun. et al. Impact energy calculation for rock slope and quantitative assessment of vulnerability for element at risk[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(5): 901-909. (in Chinese)) [20] 吴越, 刘东升, 李明军. 滑体下滑及冲击受灾体过程中的能耗规律模型实验[J]. 岩石力学与工程学报, 2011, 30(4): 693-701. (WU Yue. LIU Dong-sheng. LI Ming-jun. et al. Landslide model experimental of energy dissipation principle in the sliding and impact process[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(4): 693-701. (in Chinese)) [21] WU Jian-hong, TSAI Pai Hsiang. New dynamic procedure for back-calculating the shear strength parameters of large landslides[J]. Engineering Geology, 2011, 123: 129-147. [22] TIKA T H E, HUTCHINSON J N. Ring shear tests on soil form the Vaiont landslide slip surface[J]. Géotechnique, 1999, 49(1): 59-74.
