井管与井点相结合的降排水方案在降低地下水位中的应用——以滁河三汊湾水利枢纽改建工程中的应用为例

Application of the drainage scheme combined with well pipe and well point on reducing the underground water level

针对拟建水工建筑物位于六合区滁河中上游,其河床基本为淤泥质粉质壤土夹粉质砂壤土层,河道的水文地质特征为地下水位高、透水强、力学强度较低易液化的特点。为确保拟建水工建筑物安全及满足实施过程中重型机械对作业面负荷的需求。根据地基土的地质条件与施工可操作性的原则,提出了井管施工与井点施工相结合切实可行的降水方案,并取得了预期的效果。

The hydraulic building is located in Luhe District of Chuhe River upstream.The riverbed is muddy silty loam with silty sandy loam soil.The hydrogeological characteristics of the river are high underground water level,strong permeable,low mechanical strength and easy liquefaction.According to those features and the geological conditions of foundation soil and the principle of feasibility of construction,to ensure the safety of the hydraulic building and meet the demand for heavy machinery operation load,drainage scheme combined with well pipe construction and well point construction is put forward.The expected effect has been achieved.