On roadbed construction technique of Tiezhaizi No.1 Tunnel

Taking Tiezhaizi No.1 Tunnel as the example,the paper introduces the tripleroll unit in the tunnel roadbed construction,provides the respective technical measures to ensure the thickness of the tunnel roadbed,the waterproof,the smoothness,and bending resistance,and proves by the practice that the tunnel roadbed quality is better,so it accumulates relative experience for similar projects.