高寒山区隧道选线与方案比选——以G664俄初山特长隧道为例  

Tunnel Route Selection and Scheme Comparison in High-cold Mountain Areas——Taking G664 Echushan Extra-long Tunnel as an Example

作　　者：范伟 白慧林 范安军 FAN Wei;BAI Huilin;FAN Anjun(Sichuan Highway Engineering Consult Supervision Company Ltd.,Chengdu 610017,China)

机构地区：[1]四川公路工程咨询监理有限公司,成都610299

出　　处：《公路交通技术》2025年第1期123-132,共10页Technology of Highway and Transport

基　　金：四川省科技计划资助项目(MZGC20240038);四川公路工程咨询监理有限公司科研项目(2023001)。

摘　　要：为解决原道路等级低、翻越俄初山海拔高、行车时间长等问题,最大程度保护脆弱生态环境,国道G664稻城县香格里拉至各卡(川滇界)项目中俄初山段拟采用隧道形式通过。受俄初山复杂地质环境条件影响,国道G664俄初山特长隧道建设存在诸多难题,基于俄初山地质环境条件,设计初期共规划5条隧道方案(A、B、C、D、K线),并将5条隧道方案划分为3个隧址区,分别为B线、C线和K线(含A线、D线),通过比选确定最优方案。根据地质灾害、围岩类别、工程造价等指标差异,先初步确定了K线走廊作为隧址区,而该隧址区包含A、D、K线3条隧道轴线方案,再根据隧道围岩不良地质作用、隧道埋深、纵坡等指标进行深度论证,最终比选得出K线地质灾害发育程度弱、施工条件较好、总造价适宜,故确定K线作为最终设计方案。结合工程建设项目,从隧址比选、隧道轴线比选两阶段对俄初山特长隧道选线进行分析,研究方法与思路可供相似高寒山区特长隧道选线参考。In order to solve the problems of low road grade,high altitude crossing over the Echushan,and long driving time,and to maximize the protection of the fragile ecological environment,the G664 National Highway from Shangri La in Daocheng County to Geka(Sichuan and Yunnan border)project is planned to pass through the Echushan section in the form of a tunnel.Due to the complex geological environment conditions of the Echushan,there are many difficulties in the construction of the G664 Echushan extralong tunnel.Based on the geological environment conditions of the Echushan,a total of 5 tunnel schemes(routes A,B,C,D,K)were designed and divided into 3 tunnel site areas,namely route B,route C,and route K(including route A and route D).The optimal scheme was determined through comparison.Based on the differences in geological hazards,surrounding rock types,engineering costs,and other indicators,the route-K corridor was initially determined as the tunnel site area.This tunnel site area includes three tunnel axis schemes,route-A,route-D,and route-K.Then,based on the adverse geological effects of the tunnel surrounding rock,tunnel burial depth,longitudinal slope,and other indicators,a deep demonstration was conducted.Finally,the route-K geological hazard development degree was weak,the construction conditions were good,and the total cost was suitable.Therefore,the route-K was determined as the final design scheme.This paper combines engineering construction projects to analyze the route selection of the Echushan extra-long tunnel from two stages:tunnel site comparison and tunnel axis comparison.The research methods and ideas can provide reference for the route selection of extra long tunnels in similar high-altitude mountainous areas.

关 键 词：高寒山区 公路隧道 地质选线 隧道设计方案 

分 类 号：U452.13[建筑科学—桥梁与隧道工程]