Research On Rockfill Concrete Dam Construction Technology For Dagutai Reservoir

Construction technology of rockfill concrete dam is more and more widely used in practical engineering and become a popular new technology at present because of its superiority.Dagutai reservoir possesses high academic research value and engineering use value,which is the first reservoir project with rockfill concrete dam construction technology in Guizhou ProvinceThis paper used the finite element simulation analysis method to analyze the working state of rockfill concrete gravity dam during construction and impoundment period,taking Dagutai reservoir as an example,and studied the temporal and spatial evolution and distribution of temperature field and stress field.It also used the method of nonlinear finite element head overload to analyze the stability and safety of the dam.The application of rockfill concrete dam construction technology in the construction of gravity dam,summary of the three-dimensional finite element analysis and calculation procedures of rockfill concrete gravity dam can provide reference for the subsequent design of rockfill concrete gravity dam.This paper also recommended the dam filling to be started from low temperature season(December)through the simulation and analysis of the temperature distribution inside the dam body,the temperature change at different elevations,the stress analysis along the river and across the river in high temperature season(June)and low temperature season(December).When the simulation of dam is completed,the temperature field,displacement field and stress field of the dam are calculated by considering the self weight of the dam,the water pressure on the upstream surface and the temperature rise and drop load of the ambient temperature under the condition of normal water storage of the reservoir(796m elevation).Finally,it is concluded that the condition with transverse joint is much better than that without transverse joint in stress and strain.The author thinks that the new material and new technology of rockfill concrete is developing and improving,and it is also being applied in practical projects,which will promote the technical innovation and development of water conservancy projects.