【摘要】 抽水蓄能电站主体工程开工至首台机组发电的工期一般在50～60个月，水道充水是首台机组发电的关键线路节点。引水竖井具有施工工序多、施工难度大、安全风险高、质量不易控制等特点。针对这一问题，基于梅州抽水蓄能电站引水竖井建设，采用CFD软件对不同转弯半径对竖井弯段的水流流场、压力梯度及水头损失进行了分析，并研究了弯段半径优化、竖井反井钻孔开挖、竖井衬砌滑升等关键技术。研究发现当竖井弯段转弯半径由4倍洞径减小至2倍洞径时，水力特性指标变化不大，水头损失增加量约占输水系统总水头损失的0.18%,影响较小。结果表明：将转弯半径由4倍洞径优化为2倍洞径是可行的、合理的，并提出了竖井反井钻孔开挖、竖井衬砌滑升优化措施，降低了竖井施工难度和安全风险，提高了施工进度，为国内抽水蓄能电站主体工程施工41个月工期的最快纪录创造了基础。更多还原

【Abstract】 Completing the principal engineering components of a pumped storage power station spans between 50 and 60 months,from the inception of construction to the commencement of power generation by the first unit.The filling of the penstock with Master represents a critical phase preceding the production of electricity by the first unit.During this interval,the construction of the diversion shaft presents multiple challenges,including intricate construction procedures,considerable construction difficulty,elevated safety risks,and quality control issues.To address this issue,this study uses CFD software to analyze the flow field,pressure gradient,and head loss of shaft curved section with different curvature radius,and examines several key technologies by drawing on the practice of diversion shaft construction at the Meizhou pumped storage power station.These technologies include optimizing the curvature radius of the curved section of diversion shaft,reverse-well excavation for the shaft,and sliding-up for the lining concrete.It is found that as the curvature radius of shaft curved section reduces from 4 to 2 times the shaft diameter,the hydraulic characteristic index does not change much,and the increase of head loss accounts for about 0.18% of the total head loss of the water conveyance system.The result show that optimizing the cunature radius from 4 times to 2 times the shaft diameter is feasible and reasonable,and several improved technical measures have been proposed,such as stabilizing drill rods,mechanical scraper systems,and control technology of the relationship between concrete setting time and formwork sliding.Their implementation effectively mitigates difficulties and safety risks during shaft construction,expedites the project schedule,enhances engineering quality,and creates a 41-month timeline for the principal engineering schedule for the first power unit generation in China.更多还原