既有广大铁路低净空隧道内接触网悬挂方案设计选取研究  

Research on Scheme Design and Selection of Catenary Suspension in Lower Clearance Tunnel on Existing Guangtong-Dali Railway

作　　者：赖馨[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《高速铁路技术》2015年第3期90-93,共4页High Speed Railway Technology

摘　　要：电气化铁路由于其牵引功率大、节能环保、能大幅提高运输能力和速度,比传统的内燃牵引在技术、经济、环保方面具有明显优越性,因此,对既有内燃牵引铁路实施电气化改造是今后铁路发展的趋势。然而在对既有内燃牵引铁路的改造中,不可避免的会遇到低净空隧道接触网的架设问题。在进行接触网设计时,由于受低净空限制,制约了架空接触网正常悬挂模式,引起接触网悬挂标准的下降。既有广通至大理铁路由于既有隧道年久失修,拱顶塌陷、偏斜等病害,造成了隧道断面不统一,接触网设计中需分别对每个隧道断面进行研究。文章通过对既有广通至大理铁路低净空隧道下的接触网悬挂方式的方案论证、比选,为今后解决低净空隧道内接触网悬挂问题提供了新的思路。The electric railway has got obvious superiority in technology, economy and environmental protection due to its large tractive power, energy conservation and environment protection and improved transportation capacity and speed. Therefore, it is the tendency to transform the existing diesel traction railway to electrified railway. However, during the transformation, the issues on erection of catenary in lower clearance tunnel shall be inevitably encountered. In the design of OCS system, restriction to the normal overhead catenary suspension mode due to lower clearance leads to the decline of the catenary suspension standard. On the existing Guangtong-Dali railway, the damages such as vaults subsidence, deflection, etc. because of the tunnel in disrepair for long years make the tunnel sections variable. So research on each tunnel section should be carried out separately. The demonstration, comparison and selection of the suspension modes of catenaries in lower clearance tunnel on the existing Guangtong-Dali railway provide a new thought for solving the similar problems in the future.

关 键 词：接触网 低净空隧道 绝缘距离 刚性悬挂 柔性悬挂 

分 类 号：U225.2[交通运输工程—道路与铁道工程]