降低立堵截流难度的措施研究

Research on Method to Decreasing the Difficulty of Vertical Closure

分析了影响立堵截流难度的各种因素;水力因素包括截流落差Z、截流流量Q,截流水深h等,非水力因素包括抛投材料的物理力学性质和河床面的粗糙程度等;基于各种影响因素介绍了降低立堵截流难度的各项措施,包括提高导流建筑物分流能力、采用双戗堤截流、增强截流块体抗冲稳定性、运用宽戗堤截流、平抛垫底减小水深预防堤头坍塌提高截流安全度等。

In this thesis all kinds of factors that influence the vertical closure are analyzed, including hydraulic factors such as the closure drop Z, closure flow Q, closure water depth h and so on, while non-hydraulic factors such as the mechanics characters of the dumping materials and the asperity of the river bed, Based on these influencing factors above, the engineering measures to decrease the difficulty of the vertical closure are introduced, such as improving the capacity of the flow diversion works, making closure with two berm banks, strengthening the flow resistant stability of the closure volumes, making closure with the wide berm banks, making bedding by level dumping to decrease the water depth for preventing the dike head slumping and enhancing the closure safety and so on.