This paper presents the hydraulic study of a new manhole geometry, designed to allow the installation of separate sewer systems in narrow streets. The new manhole design comprises two chambers in one structure to manage separate flows. The new shape of the manhole generates a new flow pattern for stormwater. It is therefore important to understand the hydraulic properties of sewer systems using the newly designed stormwater manhole chamber. The present study focuses on exploring the hydraulic performance of the storm chamber, which is usually characterized by significant head losses and shockwaves, these related to different flow regimes. A physical model was used to carry out a systematic experiment to explore the flow characteristics of the manhole under both subcritical and transitional flow conditions. The results revealed an enhancement in head loss with higher amplitude waves generated at transition flow when compared with a conventional manhole.

中文翻译：

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专为独立下水道系统设计的新检修孔中风暴室的水力性能

本文介绍了一种新的沙井几何形状的水力研究，旨在允许在狭窄的街道上安装单独的下水道系统。新的检修孔设计在一个结构中包含两个腔室，以管理不同的流量。检修孔的新形状为雨水创造了一种新的流动模式。因此，使用新设计的雨水检修孔室了解下水道系统的水力特性非常重要。本研究的重点是探索风暴室的水力性能，其特征通常是显着的水头损失和冲击波，这些与不同的流态有关。采用物理模型进行系统实验，探究亚临界和过渡流条件下人孔的流动特性。