摘要
大理(丽江)至攀枝花铁路仁和隧道在洞身中部及出口端长距离穿越煤系地层,为特长高瓦斯隧道。为了缩短该隧道独头通风长度并形成巷道式通风,针对高瓦斯段落出现在洞身中部的问题,采用了主副斜井射流巷道式通风为主的施工通风方案,利用射流风在洞内形成主风流,为轴流风机将新鲜风送至平导和正洞掌子面提供了有力保证。通过工区划分合理化、需风量计算、通风设备布置优化等,制定和优化了施工通风方案,较好地解决了铁路特长高瓦斯隧道施工通风问题,验证了线路和隧道方案的可行性。
The Renhe tunnel of the Dali(Lijiang)to Panzhihua railway is an extra-long and high gas-bearing tunnel,passes through the coal measure strata for a long distance at the middle and exit of the tunnel.In order to shorten the length of single-heading ventilation and form the gallery type ventilation,the jet gallery type ventilation scheme with main and auxiliary inclined shafts is adopted to solve the problem of high gas concentrations in the middle of the tunnel.The jet flow is used to form main air flow in the tunnel,providing a strong guarantee for axial flow fans to send fresh air to parallel pilot and tunnel face.The scheme of construction ventilation is made and optimized by reasonable division of work areas,the calculation of the required amount of fresh air and the optimization of ventilation equipment layout.The scheme solves well the construction ventilation problem of the extra-long and high gas-bearing railway tunnel and verifies the feasibility of the determined alignment and tunnel scheme.
作者
何聪
HE Cong(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031)
出处
《现代隧道技术》
EI
CSCD
北大核心
2019年第S02期478-484,共7页
Modern Tunnelling Technology
关键词
特长高瓦斯隧道
施工通风
巷道式通风
主副斜井
通风方案
Extra-long and high gas-bearing tunnel
Construction ventilation
Gallery ventilation
Main and auxiliary inclined shafts
Ventilation scheme
作者简介
何聪(1990-),男,工程师,主要从事隧道及地下工程的设计、咨询和科研工作,E-mail:383175864@qq.com.
