雅康高速二郎山隧道建设关键技术创新与实践

Key Technological Innovations and Practices in Construction of Erlangshan Tunnel of Ya′an-Kangding Expressway

1概述1.1工程意义雅安至康定高速公路(简称雅康高速)是国家公路网G4218联络线“雅安—叶城”的重要组成部分,其作为川藏高速公路的一段,是通往藏区的重要国防及生命通道。雅康高速起于雅安市草坝,接乐雅高速公路,设对岩枢纽互通式立交与雅安至西昌高速公路相接,经天全县、新沟、二郎山隧道、泸定、瓦斯沟,止于康定,路线全长134 km。其中二郎山隧道长13.4 km,是雅康高速控制性工程,项目地理位置如图1所示。

1 Overview 1.1 Engineering significance Ya′an-Kangding expressway,as an important part of G4218 Ya′an-Yecheng Link of the national highway network and a section of the Sichuan-Tibet expressway,serves as an important national defense and life channel extending to the Tibetan-inhabited areas.Starting from Caoba in Ya′an and linked with Leshan-Ya′an expressway,it is connected to Ya′an-Xichang Expressway by a terminal interchange,passes through Tianquan,Xin′gou,the Erlangshan tunnel,Luding and Wasigou,and ends at Kangding,with a total length of 134 km.The 13.4 km long Erlangshan tunnel is a controlling project of Ya′an-Kangding expressway(as shown in Fig.1).