数字化模型在老城区排水管网系统改造中的应用

Application of Digital Model in the Reconstruction of Old Urban District Drainage Network System

以长沙市河西大学城周边的罗家湖泵站排水系统为例,介绍老城区排水管网进行系统性改造的设计方法。设计中基于HY-SWMM平台,构建排水管网的水力模型,通过管网的水力模拟,优化排水管道的设计,校核内涝时调蓄水体的水深,并配合系统的雨污分流工作,保证排水管网满足排水防涝和雨污分流的功能要求。同时,通过CCTV和QV等管网检测技术手段,针对现状管网的结构性缺陷、功能性缺陷等情况进行详细摸底和评估,设计合理的管网结构性修复方案。通过管道排水功能性和结构安全性两方面的搭建,系统性地完成了排水管网的雨污分流、雨水高低分排改造、内涝防治和管网修复等工作。目前该项目主干管已投入运行,效果良好。

The design method for systematic reconstruction of the drainage network in Luojiahu pumping station drainage system around Hexi University Town in Changsha City was introduced.In the design,a hydraulic model of the drainage network was constructed based on HY-SWMM platform.The project ensured that the drainage network met the functional requirements of drainage and water-logging prevention and the diversion of stormwater and sewage through hydraulic simulation of the pipe network,optimization of the drainage pipe design,verification of the water depth of the water body in water-logging areas,cooperation with the diversion of stormwater and sewage in the system.In addition,structural and functional defects of the current pipe network were explored and evaluated in detail,and a reasonable pipe network structural repair scheme was designed through CCTV,QV and other pipe network detection techniques.The stormwater and sewage diversion of the drainage network,partition drainage of stormwater in high and low elevation districts,water-logging prevention and control,pipe network repair and other works were systematically completed through the drainage function and structural safety construction of the pipeline.At present,the main pipeline of this project has been put into operation and shown a good performance.