长距离输水隧洞施工期通风设计与管理

Design and management of ventilation during construction of long-distance water conveyance tunnels

开挖输水隧洞,将湖泊水源引向城市,这类隧洞通常长度较长且隧洞断面较小;受限于地形和建造成本影响,支洞修建较少。长距离输水隧洞施工期通风方式对施工人员的安全和施工工期的控制影响极大。文章针对平潭及闽江口水资源配置工程,计算隧洞施工期通风量,对通风设施布置进行优化设计。为了更好地监测通风效果和掌握洞内污染物分布情况,文章研究开发了一套施工期隧洞通风监测系统,可为长距离输水隧洞施工期通风提供参考。

Water conveyance tunnels which convey water from lakes to cities are usually long and have small areas of sections.Besides,due to the impact of topography and high construction cost,there are few branch holes constructed.During the construction of long-distance water conveyance tunnels,the ventilation method has great influence on the safety of constructors and the control of construction period.In this paper,in the water resources allocation projects of Pingtan and Minjiang,the ventilation quantity during the construction is calculated,and the ventilation arrangement is optimized.In order to better monitor the ventilation effect and master the distribution situation of pollutants in the tunnels,a set of ventilation monitoring systems during the construction period are developed.This case can provide reference for the ventilation during the construction of long-distance water conveyance tunnels.