溧阳抽水蓄能电站上水库面板堆石坝关键技术研究

Research on Key Techniques for Constructing Upper Reservoir's CFRD of Liyang Pumped-storage Power Station

溧阳抽水蓄能电站上水库主坝坝型为混凝土面板堆石坝,全部用工程建筑物开挖料填筑,坝料岩性复杂;坝基地形轴线向呈"W"形,横断面地基为倾向下游的斜坡,不均匀变形突出;地质条件差,库周、库底防渗等均是工程的关键技术。结合工程特点,从坝料特性、施工期大坝变形控制、强震区库盆动水压力、面板防裂措施和连接板结构形式等方面对工程关键技术进行了研究,提出了变形控制、渗流控制、施工质量控制措施等。

The main dam of upper reservoir in Liyang Pumped-storage Power Station is a concrete laced rockllll flanL line aam is fully constructed with excavated materials of project and the lithology of rock fill is complicated. The differential deformation of dam is a major problem because the dam foundation in longitudinal direction presents a W-shape and in transverse direction dips toward downstream. Due to poor geological condition, the seepage control for reservoir basin and its perimeter is also prominent. By considering the characteristics of project, these key technical issues are studied from the aspects of embankment material features, deformation control measures in construction period, hydrodynamic pressure of reservoir basin in earthquake zone, crack control measures of face slab and connecting plate structure, and corresponding control measures of deformation, seepage and quality are finally proposed.