Research of an Slope under Rainfall and Deep Excavation Condition with UDEC

Abstract:

The landslides often due to the rainfall and the excavation inside. Although both of them could influenced the stability of the slope, in the different combination of the condition of rainfall and excavation. The results would make a big difference from condition. The analysis results of Finite Element Method have a large difference with the actual situation, especially in the large deformation and landslide. Therefore, we use the Distinct Element Method to simulate and analysis the collapse of Zengziya in Chongqing. We collect different parameters to simulate the changed conditions of the combination of rainfall, half excavation and whole excavation. Then we will get the data of displacement of the rock and the stress redistribution of the slope. By the analysis of the those data, and the comparison from the field situation, we will draw a conclusion that the main factors of the landslides is the rainfall, and the excavation sometimes can simulate the landslides. At last, our research results can make some help of the practical engineering.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 756-760
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.756
• Online since: August 2013
• Authors: Li Xuan Ren*, Ning Kai
• Keywords: Displacement, Landslide, Mine Tunnel Excavation, Rainfall Conditions, UDEC

References

[1] Itasca Consulting Group. Inc. UDEC(Universal Distinct Element Code)User's Manual, Version 4. 0 [R]. [s. l. ]: Itasca Consulting Group, (2000).

[2] Louis C. Rock hydraulic in rock mechanics [M]. New York: Verlay Wien, (1974).

[3] HUANG Runqiu，QI Guoqing. Observation of suction in a landslide [J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 26(2): 216–219.

[4] WANG Zhechao，LI Shucai，XUE Yiguo，et al. Parameter sensitivity of rock mass integrity for a pilot underground crude oil storage caverns during construction phase[J]. Rock and Soil Mechanics, 2011, 32(2): 489-495.

[5] JIANG Yujing, WANG Gang, LI Bo, et al. Experimental study and analysis of shear-flow coupling behaviors of rock joints[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(11): 2254-2259.

[6] GENG Keqin，CHEN Fengxiang，LIU Guangting，et al. Experimental research of hydraulic properties of seepage flow in fracture[J]. Journal of Tsinghua University：Science and Technology, 1996, 36(1): 102-106.

[7] SHI Hongbin. Analysis and evaluation of water seal condition and surround rock stability of Huangdao water sealed underground petroleum storage caverns in rock(Ph. D. Thesis)[D]. Beijing：Beijing Jiaotong University.

DOI: 10.1201/9780203883204.ch71

[8] GAO Xiaofei, CHEN Zhihua, AN Qi, Discussion on Effect of Unstable Landslide by Rainfall[J]. Ground water, 2007, 29(1): 85-87.