结合水动力学原理在旬阳水电站安康城区及周边浸没研究中的应用

APPLICATION OF BOND WATER DYNAMIC THEORY TO SOIL SUBMERGENCE IN ANKANG CITY AND SURROUNDING AREAS ADJACENT XUNYANG HYDROPOWER STATION

旬阳水电站库尾安康城区及周边地区系汉江左岸河流阶地和高、低漫滩,具有典型的二元结构特征,其中高漫滩表部普遍分布有较厚的人工填土。本文在浸没研究中应用结合水动力学原理以及粘性土的渗流特征,确定测压水位和粘土层含水带水位关系,针对不同建筑物的基础类型、埋深、填土层厚度、郊区农作物类型等,确定不同的浸没临界深度。并通过7个不同正常蓄水位工况的地下水壅高计算和粘土层内的含水带埋深计算,分析和研究浸没程度和范围,最终确定合理的正常蓄水位,为完成本工程水库移民安置工作提供了可靠的地质依据。

Ankang City and the surrounding areas adjacent to Xunyang Hydropower Station reservoir tail zone locate on the terrace and the high - and low floodplain of the left bank of the Hanjiang River. The ground has the typical dualistic -structure characteristics. The surface layer of the high floodplain generally distributes relatively thick artificial fill. The bond water dynamic theory and the infiltration flow characteristics of the clay soil are applied to determine the relations among the pressure water level and the aquifer belt of clay layer water level. In this research, different submergence critical depths are defined by foundation types, depths of burial, fill layer thickness of different buildings and the type of crops of suburbs, etc. the paper calculates the groundwater Backwater Value and the burial depth of clay layer water - bearing zone in seven different normal impounded level conditions to investigate the submergence area and degree. As a result, a reasonable normal impounded level is determined ultimately. This result can provide a reliable geological basis for the migration resettlement work of this project reservoir area.