平坦区域设计暴雨重现期对雨水管道工程投资的影响研究

Study on the influence of rainstorm design return period on rainwater pipeline investment in the flat area

针对选定的平坦区域,用不同设计暴雨重现期和管道布置方式对工程投资的影响进行分析,分别采用8种设计暴雨重现期和2种管道系统设计方案,进行雨水管道工程设计及投资计算.得出工程投资增加倍数与设计暴雨重现期的函数关系,研究表明管道布置方式和区域面积的大小对于暴雨重现期提高所带来的工程投资增加的倍数影响不显著,并对雨水管道设计暴雨重现期的取值提出建议。

According to certain flat area, the impacts of different rainstorm design return peri-ods and pipe network layouts on project investment were analyzed in this paper. Eight different rain-storm design return periods and two different pipe network layouts were employed in the storm wa-ter drainage pipe network project design and investment calculation. The functional relation of in-vestment increased multiples and rainstorm design return period were derived. The results indicated that rising rainstorm design return period would not dramatically increase rainwater pipeline invest-ment increased multiples under specific layout style and research area. In addition, the results also provided valuable suggestion on the rainstorm design return periods for rainwater pipeline design.