Study on Fluid-Structure Interaction Based on Hard Rock Deterioration Theory

Abstract:

Based on the fluid-structure interaction theory, FLAC3D was adopted to conduct a numerical simulation on the excavation of hong shigou hard rock tunnel. The basic mechanical properties for rock mass changed significantly during the process of secondary stress adjustments, and the rock deterioration constitutive model (RDM) can accurately reflect both the abruptness of the rock yield failure and the changes of mechanical parameters after yield. On the basis of RDM, the permeability coefficient with equivalent plastic strain function was introduced which can update the permeability coefficient. The results showed that both the surrounding rock displacement and the volume of plastic zone increased significantly because of the seepage action. Therefore, the seepage of fissure water on the hard rock should be fully considered during excavating and supporting in order to prevent accidents such as water inrush and sudden collapse.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 1551-1554
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.1551
• Online since: August 2013
• Authors: Chang Yu Jin, Dong Liu, Chun Fu Xiang, Yu Dong Wang, Jian Zhang, Jin Lai Ren
• Keywords: FLAC-3D, Fluid Structure Interaction (FSI), Numerical Simulation, Rock Deterioration

References

[1] XU Guangli, Fractal and fractal dimension of the rock mass discontinuity geometricfeature[J]. Hydrogeology and Engineering Geology, 1993, 2: 20-22.

[2] Yang Huijun, Han Wenfeng, et al. Seepage features of fissure water in original rock and practical case study[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(Add 2): 2582-2588.

[3] Li Diyuan, Li Xibing, et al. Stability analysis of surrounding rock of multi-arch tunnel based on coupled fluid-solid theorem[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(5): 1056-1064.

[4] Ji Xiaoming, Wang Yuhui. Hydromechanical coupling analysis of tunnel excavation process[J]. Chinese Journal of Underground Space and Engineering, 2005, 1(6): 848-852.

[5] Jiang Quan, Feng Xiating, Chen Guoqing. Study on constitutive model of hard rock considering surrounding rock deterioration under high geostresses[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(1): 144-152.

[6] Sun Shuwei. The application of FLAC3D in rock and soil engineering[M], Bei Jing: China Water Power Press, (2011).

[7] He Manchao, Li Chunhua, Wang Shuren, Research on the non-linear mechanics characters of large section cavern excavating within soft rock by numerical simulation[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(4): 483-486.