Abstract
The purpose of the design of the Qianqianwan tunnel is to penetrate the Yiwanline,making it easier to travel in the Sichuan-Yunnan region and promoting the development of the local economy. It can also promote the strategy of the development of the western region. The Xiqianwan Tunnel is a single-track railway tunnel with a starting range of DK170+935~DK171+215 and a length of 280m. The main content of this design is to design the following aspects of the tunnel using the actual engineering data of the Yiqianwan Tunnel. In this paper, the section of the tunnel is first designed, and then the location of the gate and the structure of the gate are selected and checked by geological conditions. Then the design of the lining structure of the tunnel is used and the internal force of the lining is used. Carry out the check calculation, and finally select the construction plan and the design of the construction organization and the tunnel auxiliary equipment.
Keywords:tunnel;design;tunnel portal;tunnellining;constructionorganization