高拱坝与坝肩开挖边坡的相互作用研究

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Abstract In southwest district of China，a number of high arch dams are being built or going to be built. Due to the complicated geological conditions and features of high arch dams and slopes，the interaction between dams and abutment excavated slopes has become an important issue in this area. On the basis of elastoplastic theory，the analysis method of structure stability using plastic complementary energy as parameter is proposed；and under specified loading conditions，elastoplastic constitutive relation makes the structure whose plastic complementary energy is minimum tend to be stable. It points out that an elastoplastic structure is not stable if it cant satisfy simultaneously equilibrium condition，kinematical admissibility and constitutive equations under the prescribed loading. If the plastic complementary energy equals 0，which means that the stress field can satisfy equilibrium condition and constitutive equation at the same time，then the structure is stable；if the plastic complementary energy is greater than 0，then it means the structure is unstable. Based on Drucker-Prager criteria，a perfect elastoplastic incremental analysis method is considered in nonlinear finite element computation，which has good convergence for both small and large loading step sizes；then above method is used to study the interaction between slope and dam of Jinping I. Plastic complementary energy curves varying with strength reduction are provided to show the interaction between slope and dam. The results show that the push force coming from the arch dam is of some benefits to the slopes stability to some extent；and the slope structure strength reduction has little influence on arch dam until the strength reduction rate is larger than 1.5.

Key words： slope engineering arch dam slope stability plastic complementary energy interaction

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	LIU Yaoru
	HUANG Yuequn
	YANG Qiang
	CHANG Qiang

Cite this article:

LIU Yaoru,HUANG Yuequn,YANG Qiang, et al. STUDY OF INTERACTION BETWEEN HIGH ARCH DAM AND ABUTMENT EXCAVATED SLOPE[J]. , 2010, 29(S2): 4038-4042.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/4038

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