大塘一级水电站对数螺旋线双曲拱坝设计

Design of the logarithmic spiral domed dam of Datang first-step hydropower station

大塘一级水电站位于基本对称的较宽梯形河谷,最大坝高48.5 m,其拱坝体形经过比较和优化,最终结合泄洪建筑物布置选择了对数螺旋双曲拱坝,使坝体结构得到全面优化,拱坝结构的特点得以充分发挥,工程投资大大减少.

The dam site of Datang Frist-step Hydropower Station is located on the trapezoidal river valley of basic symmetry. Its dam height is 48.5m. Combined with the layout of flood-relief structure, the logarithmic sprial domed dam is selected by the optimum design of dam body. The dam structure is optimized. The feather of arch dams is made good use. The dam investment is remarkably lowered.