流体力学A

[S04A-02] Experimental Study on Hydraulic Functions of Manholes in a Surcharged Sewer Pipe System

*Hao Zhang¹, Kenji Kawaike², Shoji Okada³, Taku Fujiwara¹ (1. Kochi University, 2. Kyoto University, 3. National Institute of Technology, Kochi College)

Keywords:Urban flood, Manhole, Hydraulic function

For an appropriate assessment of the capacity and efficiency of a drainage system, and to improve the accuracy of numerical models for urban flood simulation, it is crucial to understand the hydraulic functions of manholes. In this study, a series of laboratory experiments have been conducted with a scaled physical sewer system model. In particular, manholes of circular and square shapes, with and without covers, and arrangements with different connecting angles to the branch pipelines have been investigated. Based on the research results, the sewer flow, pressure changes and energy losses associated with manholes have been characterized and the important roles which the manholes play have been discussed in a surcharged sewer pipe system.