隧洞开挖过程中渗透破坏细观机制研究

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Abstract Seepage failure is a main disaster in the process of tunnel excavation. The study of seepage failure mechanism is important to predict it and to decrease the probability of this kind of disaster. Taking advantage of discrete element method(DEM) comparing with the traditional numerical modeling on dynamic simulation and characteristic simulation of dispersed particles，the PFC2D based on DEM is adopted to establish the 2D numerical seepage model in which rock is built by bonded particles. The whole process of seepage failure under different hydraulic gradients due to tunnel excavation is simulated by using PFC2D and computational fluid dynamics(CFD). Propagation of microcracks and permeability changes can be real-time reflected during the excavation. Simulation results show that it is applicable to use particle flow code(PFC) to simulate seepage failure process of rock；and it has certain guiding significance on tunnel excavation.

Key words： tunnelling engineering discrete element method(DEM) particle flow code(PFC) tunnel excavation

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	Articles by authors
	NI Xiaodong1
	2
	WANG Yuan1
	2
	LU Yuguang1
	2

Cite this article:

NI Xiaodong1,2,WANG Yuan1, et al. STUDY OF MESO-MECHANISM OF SEEPAGE FAILURE IN TUNNEL EXCAVATION PROCESS[J]. , 2010, 29(S2): 4194-4201.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/4194

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