城市雨水泵站侧向出水箱涵整流措施模型试验

为研究上海某雨水泵站侧向出水箱涵的水力流态,采用物理模型试验方法对出水箱涵内部的水力流态特性进行分析,并针对发现的问题提出了在出水箱涵内加设由导流短墩、底坎、组合梁构成的组合式整流措施。试验结果表明:出水箱涵内部水流扩散不良,导致出水箱涵出口流量分布不均、主流居中且出口两侧出流较小;增设组合式整流措施后,出水箱涵在导流短墩、底坎、组合梁的综合整流作用下,显著均化了出水箱涵各孔流量,有效提高了出水箱涵的出流均匀度,解决了出水箱涵流态存在的问题。

Model test on rectification measures of lateral outlet box culvert in an urban rainwater pumping station

To study the hydraulic flow state of a lateral outlet box culvert of a rainwater pumping station in Shanghai, a physical model test method was used to analyze the hydraulic flow state characteristics inside the culvert. Aiming at the founded problems, a combined rectification measure consisting of short diversion piers, bottom sills and composite beams was put forward. The test results show that the water flow inside the outlet box culvert is poorly diffused, resulting in uneven flow distribution at the outlet of the box culvert, centered main flow, and weak outflow on both sides of the outlet. After the combined rectification measures, under the comprehensive rectification action of the short diversion pier, the bottom sill and the composite beam, the flow distribution of each hole of the outlet box culvert is significantly homogenized, which effectively improves the outflow uniformity, and solves the existed problems of the flow state.