文档介绍：年月
2012 10 铁道工程学报 Oct 2012
第期总
10 169 JOURNAL OF RAILWAY ENGINEERING SOCIETY NO. 10 Ser. 169
文章编号 1006 - 2106 2012 10 - 0075 - 05
铁路隧道***等级划分的探讨
张贵铜
( 中铁二院重庆勘察设计研究院有限责任公司, 重庆 400023)
摘要研究目的铁路隧道***等级划分,在勘察期间要准确定性很难,在施工中影响因素众多,争议较大,操
, , , , , ,
作性相对较差因此如何既确保施工、运营安全又节约工程投资提高施工效率缩短施工工期科学、合理
, , ,
地确定***等级值得进一步研究、实践。文章结合某铁路***隧道施工实例以翔实的***检测资料分析
,
***涌出量、***浓度与施工安全的关系提出新的观点。
研究结论目前《铁路***隧道技术规范》中以绝对***涌出量 0. 5 m3 /min 为高、低***等级划分界线的
, ,
标准太低使得一些可以按低***措施安全施工的隧道判定为高***等级增加不必要的防爆、衬砌加强等措
, ,
施浪费工程投资而在满足通风要求的情况下以回风流中***浓度 0. 5% 作为高、低***等级划分的标准
更合适。
关键词***浓度涌出量风速划分标准
中图分类号 U25 文献标识码 A
Discussion on Grade Division of Railway Tunnel Gas
ZHANG Gui - tong
, , ,
Chongqing Survey Design and Research Co. Ltd China Railway Eryuan Engineering Group Co. Ltd Chongqing
,
400023 China
Abstract Research purposes It is very difficult to grade the gas of railway tunnel during the investigation because
there are many influence factors to be involved in in the construction with the big dispute and poor operability.
,
Therefore it is worth doing the further study on how to grade the tunnel gas scientifically and reasonably to guarantee the
, ,
construction and operation safety save the construction cost enhance the the construction efficiency and shorten the
,
construction period. Combined with the construction practice of a railway gas tun