基于三维有限差分法的小湾拱坝施工步模拟及极限承载分析

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Abstract To study the final failure mechanism of high arch dam and its safety factor，it's necessary to deeply analyze the ultimate bearing capacity of Xiaowan arch dam which is a typical project. Based on the three dimensional explicit three dimensional finite difference method of FLAC3D，this article accurately simulates the process of the dam construction and water storage.On that base，by using the strength accumulation coefficient method and over loading coefficient method，the ultimate bearing capacity results of Drucker-Prager criterion and Mohr-Coulomb criterion which are all with a tension cutoff are analyzed and compared with each other. Combined with the specific failure deformation，by methods of observing the connected plastic zone in the evolutionary process and recording the sudden change of the dam displacement，the gradual failure mode and the final safety factor of Xiaowan arch dam are found. The reason why the safety factors are significantly different under the two criterions is analyzed，it’s also proposed that the Mohr-Coulomb criterion is better than the Drucker-Prager criterion in the evaluation of the ultimate bearing capacity of arch dam. Finally，a sensitivity analysis on the dilatancy angle and tensile strength is made，and some useful conclusions are found.

Key words： hydraulic engineering high arch dam construction process failure mode ultimate bearing capacity

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	Articles by authors
	GAN Haikuo1
	2
	LAI Guowei1
	LI Yesheng3

Cite this article:

GAN Haikuo1,2,LAI Guowei1, et al. CONSTRUCTION PROCESS SIMULATION AND ULTIMATE BEARING CAPACITY ANALYSIS OF XIAOWAN ARCH DAM BY 3D FINITE DIFFERENCE METHOD[J]. , 2013, 32(s2): 3918-3927.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3918

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