卡尔巴斯水库坝基防渗处理设计

Seepage Control Treatment Design for Dam Foundation of Kaerbasi Reservoir

卡尔巴斯水库为小型山区工程,大坝为黏土均质坝,坝基覆盖层为二元结构,上层为淤积物,下层为砂卵砾石,覆盖层总厚度5.0~6.0 m。工程设计中在坝基范围内清除淤积物,将砂卵砾石层作为土坝坝基,并在坝轴线处开挖截水槽且进行帷幕灌浆处理,通过建立计算模型,分析了该水库大坝、坝基渗透稳定及防渗效果。

The Kaerbasi Reservoir is a small sized engineering in the mountain region. Its dam is a homogeneous clay earth dam. There are two covering layers in the dam foundation; the upper layer is sludge and the lower layer is sand and gravel.The total thickness of covering layers is 5~6m. In the engineering design, the sludge layer in the scope of the dam foundation must be removed; the sand and gravel layer should be retained as a part of the dam foundation;excavating a cutoff trench on the dam axis and conducting curtain grouting in it should be adopted. Through establish of the calculation model, the paper analyzes the seepage stability of dam slops and dam foundation and the seepage control effect.