The Analysis Of Right Bank Dam Abutment Slope Stability And Research Of Reinforcing Scheme Of Dongfeng Hydropower Station

The Dongfeng Hydroelectric Station undertakes the important task of tune summit, frequency modulation and spare for accident in Guizhou province electrical network, now as the development of changing situation, need to carry out extension for it to rebuild. Though the steady analysis calculation in construction design phase and the completion safe appraisal in 1998, as a result, shows dam abutment to stabilize , may directly carry out extension to be under construction , but the demolition disturbance in construction process can make partial rock bodies unload payload and relax for stress release ,when dig surface open certain depth scope inland stress will spread again and form twice stress site, and along slope surface and hole room rock wall with the time prolonging produce distort; At the same time with the factor for dam abutment steady is complex, between the geological parameter of side slope with the time passing will occur change; Besides during expanding construction and the following operation, still cause rock body partly lose, is steady to collapse to fall; Additionally .because of the right dam abutment of Dongfeng hydroelectric station have many places of the bad geologies such as fault and weak mezzanine, therefore before power station extentions, need to carry out dam abutment steady check and consolidation research.In this paper, firstly according to 4 kinds of choosing scheme with hole line arrangement of leading hole of extension project, with the way of rigid body limit balance, plane limited and three-dimensional un-line limited carry out right bank dam abutment stabilize analysis calculation, calculation result show 4 kinds hole dig scheme enforcement right dam abutment side slope basically can satisfaction stabilize service requirement. Then difference assumption various consolidation handling after scheme enforcement, with the way of rigid body limit balance carry out right dam abutment stabilize check, result show 4 kinds scheme enforcement can ensure extension construction issue and the foUowing runtime side slope reach stabilize...