岩角塘水库泄洪消能建筑物型式选择与结构设计

Type Selection and Structural Design of the Flood Discharge and Energy Dissipation Structures in Yanjiaotang Reservoir

泄洪建筑物型式是整个枢纽布置与防洪度汛的重要因素。为确保岩角塘水库泄洪建筑物与河谷地形、坝基软弱基岩、坝肩单薄抗滑岩体等特性相匹配,综合考虑枢纽布置、工程投资和淹没占地等因素,对泄流能力、泄洪方式、溢洪道结构与消能型式等进行了详细论证。研究表明,坝顶表孔溢流、底流消能方式的枢纽布置紧凑,可减少溢洪道开挖并缩短放水建筑物长度,对环境破坏较小,技术与经济指标较优。

The type of the flood discharge structures is an important factor for the project planning and the flood control.To ensure that the flood discharge structures in Yanjiaotang Reservoir appropriately match the specific conditions of the project such as the topographic conditions,the weak foundation rock of the dam,and the thin anti-sliding rock mass on the dam shoulder,a detailed study is carried out on the discharge capacity,flood discharge method,spillway structure and energy dissipation type,considering the project layout,investment and inundation land occupation.The results show that the layout scheme with the overflow spillway and the bottom flow energy dissipation is compact in space,which can reduce the excavation of the spillway and shorten the length of the discharge structures.Also,it is of less environmental damage and better technical and economic benefits.