Pregnant Mechanism and Mechanical Model of Rock Landslides in Chair-Shaped Cataclinal Bank Slopes

Abstract:

The pregnant and sliding mechanism was firstly compared between Vajont and Qianjiangping large rock landslides, which happened in the chair-shaped cataclinal bank slopes. And then the essence of the landslides occurred was deduced. The pregnant and sliding process of the landslides was showed two stages. First, after the first impoundment of the reservoir, the soil and shallow rock at the front of the landslides were slipped and then caused posterior margin of the deep latent sliding surface cracks. So the groundwater supply condition was significantly changed. Second, with the rapidly increase of the groundwater recharge, its pressure on the front of the landslides was also rapidly rise to the critical value which the landslides occurred. Afterwards, the stability mechanical model of the chair-shaped cataclinal bank slopes and critical value formula of the groundwater pressure were established on the basis of the stability mechanical model of general chair-shaped cataclinal slopes, added reservoir water level which was a dynamic load. While working procedures to determine the groundwater pressure was put forward. Last, the theory was certified validity take Liangshuijing rock landslide of the Three Gorges Project area as an example and the monitoring methods and control measures for the landslide were proposed.

• Periodical: Applied Mechanics and Materials (Volumes 580-583)
• Pages: 2589-2599
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.580-583.2589
• Online since: July 2014
• Authors: Xian Chun Ma, Xi Chang Chen, You Jun Feng*
• Keywords: Chair-Shaped Cataclinal Bank Slopes, Groundwater Pressure, Mechanical Model, Pregnant and Sliding Mechanism, Prevention Measures, Rock Landslides

References

[1] J.G.C. Anderson and C.F. Trigg: Case-Histories in Engineering Geology (Geological Publishing House, China 1986). (in Chinese).

[2] L.S. Wang: Chinese Journal of Geological Hazard and Control Vol. 18 (2007), p.145 (in Chinese).

[3] S.R. Xiao, D.F. Liu, F.X. Jiang and X.L. Jiang: Chinese Journal of Rock Mechanics and Engineering Vol. 29 (2010), p.1023 (in Chinese).

[4] B.P. Wen, J. Shen and J.M. Tan: Hydrogeology and Engineering Geology Vol. 35 (2008), p.12 (in Chinese).

[5] S.D. Li, X. Li, Y.H. Liu and X.S. Sun: Hydrogeology and Engineering Geology Vol. 35 (2008), p.18 (in Chinese).

[6] F.C. Dai, J.H. Deng, L.G. Tham, K.T. Law and C.F. Lee: Can. Geotech. J. Vol. 41 (2004), p.1233.

[7] F.W. Wang, Y.M. Zhang, Z.T. Huo, Tatsunori Matsumoto and B.L. Huang: Landslides Vol. 1 (2004), p.157.

[8] X.C. Chen, et al: Type and Stability of the Reservoir Banks of the Three Project in Yangtze River (Sichuan Technology and Science Press, China 1993) (in Chinese).

[9] X.C. Chen, M.C. Gu, S.W. Shi and X.C. Ma: Journal of Engineering Geology Vol. 17 (2009), p.752 (in Chinese).