Discussion on Several Problems Concerning Current Railway Tunnels Construction

Focusing on commonly-used machinery and equipment in current railway tunnels constructed by drill-blasting method as well as process organization,four existing problems are discussed in this paper,including insufficiency of inverted arch trestle length,contradiction of initial support process,difference of feet-lock bolt settlement,and shortage of initial support testing.And then the methods to solve above-mentioned problems are proposed in this paper,including lengthening inverted arch trestle,adjusting initial support process,standardizing settlement of feet-lock bolt,increasing nondestructive testing of initial support.