白鹤滩拱坝扩大基础加固效果研究

doi:10.13722/j.cnki.jrme.2014.1339

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Abstract Extended foundation of Baihetan high arch dam is considered as an important form of reinforcement to adapt to the unfavorable geological condition of the left bank foundation，the evaluation method research of its reinforcement effect is not yet fully definite. Three-dimensional numerical model was built，coupling with elaborate simulation of the foundation structure，and the reinforcement effect analysis of extended foundations conducted through elasto-plastic finite element method，during which an evaluation method was proposed based on deformation reinforcement theory. The result shows that extended foundation can help to increase the integral rigidity of dam body，improve the symmetry of the left and right arch abutments deformation and the stress state of rock mass near the base surface. The unbalanced force and plastic complementary energy(PCE) were taken to quantize the reinforcement effect. During the overloading process，the unbalanced forces of dam faces，dam toe and dam heel，area of dam surface yield zone were reduced by extended foundation，while the PCEs of different statistical parts consequently decrease as well. Thus，the stabilities of these critical region of arch dam engineering were promoted by it. The research focusing on the extended foundation proves the necessity of this reinforcement measure，and will be useful to understanding its reinforcement mechanism，which is also expected to have a vital significance for design and practice of high arch dam engineering.

Key words： hydraulic engineering high arch dam extended foundation reinforcement effect unbalanced force pedestal

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	Articles by authors
	SONG Ziheng1
	LIU Yaoru1
	YANG Qiang1
	XU Jianrong2
	HE Mingjie2
	ZHANG Weidi2

Cite this article:

SONG Ziheng1,LIU Yaoru1,YANG Qiang1, et al. STUDY OF REINFORCEMENT EFFECT ANALYSIS OF BAIHETAN ARCH DAM EXTENDED FOUNDATION[J]. , 2015, 34(S2): 4403-4411.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1339 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4403

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