特长隧道平面线型探讨  

Discussion on the Horizontal Alignment of Extra-long Tunnel

作　　者：周心培[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《铁道工程学报》2016年第8期90-93,共4页Journal of Railway Engineering Society

摘　　要：研究目的:长隧道的平面通常设计成直线。笔者认为在一定的地形条件下,为减少斜、竖井辅助工程的埋深,隧道线路可以向低山一侧偏移而设计成曲线;线路的弯曲能减少辅助工程量,但也会增加隧道的工程量。本文的研究目的在于解决特长隧道选线与辅助工程的定位问题。研究结论:(1)长、特长隧道合理地设置曲线,增加工程量很小,但辅助工程量的节省十分明显,而且有利于缩短工期;(2)隧道局部增设绕行曲线对车辆运营无不良影响;(3)增设绕行曲线不增加线路养护难度和作业量;(4)增设绕行曲线而增加的空气阻力和对运营通风的影响都很微小;(5)增设绕行曲线能有效降低辅助工程的埋深,减少辅助工程量;(6)这种线型适用于长、特长隧道平面选线。Research purposes： Long tunnels are usually designed in a straight line. The author considers that under certain terrain conditions, in order to reduce the depth of the inclined and vertical shafts, which are necessary auxiliary engineering for long tunnel, the tunnel line could be offset to the low side of the mountain and designed to curve. Curved line can reduce the amount of ancillary works, but also increases the amount of the tunnel project. Research purpose is to solve the contradiction between route selection of extra - long tunnel and ancillary works location. Research conclusions：（ 1 ） By setting reasonable curve in long and extra- long tunnels, can effectively reduce the amount of auxiliary works and shorten the duration of the tunnel, while the incremental amount of engineering is very small. （2） Additional local bypass curve in tunnel has no adverse effects on the vehicle operation. （3） Additional bypass curve does not increase the difficulty and quantity of maintenance works. （4） The effect of additional bypass curve on air resistance and operation ventilation is very small. （5） Additional bypass curve can effectively reduce the depth of auxiliary engineering. （6） This line type is suitable for long and extra -long tunnels.

关 键 词：特长 隧道 平面 线型 

分 类 号：U2[交通运输工程—道路与铁道工程]