玉林抽水蓄能电站地下厂房位置及轴线优化OA

The location and axis selection of the underground powerhouse are critical technical aspects of pumped-storage power stations.The longitudinal axis orientation of the main powerhouse should ensure a smooth layout of the water diversion and power generation system,form a large angle with the strike of major rock structural planes,and in high-ground stress areas dominated by tectonic stress,form a small angle with the maximum principal stress direction.The Yulin Pumped-Storage Power Station is designed with a single tunnel supplying four turbine units,and the diversion bifurcated pipes are constructed with reinforced concrete.The high-pressure bifurcated pipes and the main powerhouse cavern have strict requirements on the geological conditions.The project has passed the con-sultation on the three major special topics.Under the guidance of the review comments on the feasibility study re-port,and with reference to the existing experience from similar projects,the ideas for further potential optimization were puts forward.A large amount of supplementary survey work was carried out.Based on the newly revealed geo-logical conditions and ground stress,while not affecting the original land acquisition scope,a detailed comparison and selection was conducted from multiple aspects such as axis layout,hydraulic building layout,construction orga-nization,and comparable investment,to achieve the best choice from the best options.