单洞三车道公路隧道扩挖成四车道的开挖方案的探讨及思考  

Discussion and Consideration on the Excavation Scheme of Expanding Three Lanes into Four Lanes of Single Highway Tunnel

作　　者：余顺[1,2] 胡学兵 夏阳于雨[1,2] YU Shun;HU Xuebing;XIA Yangyuyu(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;National Engineering Laboratory for Highway Tunnel Construction Technology,Chongqing 400067)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]公路隧道建设技术国家工程实验室,重庆400067

出　　处：《公路交通技术》2019年第6期89-93,共5页Technology of Highway and Transport

摘　　要：目前对单洞2车道的公路隧道扩建成4车道的工程实例和相关研究已有不少,但对单洞3车道隧道扩建成4车道隧道的相关案例及研究鲜有报道。以某公路隧道扩建项目为例,基于对既有3车道隧道受力状态的不同认识和技术措施所起的不同作用,提出3种扩挖方案,并对扩挖方案中遇到的问题提出思考,供类似工程参考。At present,there are many engineering examples and related studies on the expansion of a single-tunnel with two lanes into the four lanes of highway tunnel,but few cases and studies on expanding a single tunnel with three lanes into the four lanes of highway tunnel have been reported.Taking a highway tunnel expanding project as the example,three expanding schemes are put forward based on the different understanding of the mechanical behavior of the existing three-lane tunnel and different effects of technical measures,and the problems encountered in the expanding schemes are considered to provide reference for the project.

关 键 词：3车道公路隧道 4车道 开挖方案 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]