石虎塘航电枢纽金滩防护区防护堤设计

Design of protective embankment in Jintan protection zone of Shihutang Navigation-Power Complex

石虎塘航电枢纽金滩防护堤全段存在地面高程低于水库回水位,堤基表层壤土层薄、壤土含砂量高、淤泥质粘土层厚等问题。根据防护区整体规划、水文地质、地形地貌及防护对象重要程度等条件,提出金滩防护堤规划设计建议,优选粘土心墙砂卵石堤、土工膜防渗斜墙堤,部分堤段采用高压摆喷防渗墙和设置减压井等技术方案。

Along the whole section of protective embankment in Jintan protection zone of Shihutang Navigation- Power Complex, the ground elevation is below the reservoir backwater level; dike foundation has thin surface loam layer, high sand content and thick silty clay layer. In view of these problems, suggestions were put forward for the planning and design of protective embankment according to the overall planning of Jintan protective zone, the hydrological, geological and topographical conditions, and the importance of protected objects etc. The selected technical schemes include the sand and gravel embankment with clay core wall, the inclined wall embankment with geomem-brane, the high pressure swing spray impervious wall and the relief wells in hart of the embankment.