Patent ID: 9568295
Date: 2017-02-14
CPC Classifications: E21D,F42D

Claim:
1. A construction method using a plurality of blasting protectors, the construction method comprising: excavating a pilot tunnel using a tunnel boring machine (TBM); drilling a transverse or longitudinal charge hole on an upper half section of the pilot tunnel; connecting and installing the plurality of blasting protectors that partition the upper half section and a lower half section at the front and the rear at the inside of the pilot tunnel; enlargement blasting the upper half section of the pilot tunnel using the transverse or longitudinal charge hole; and loading and carrying mucks stacked on the upper of the plurality of blasting protectors by the enlargement blasting in a muck car moving to a first lower space of one upper blasting protector of the plurality of blasting protectors, wherein the muck car is moved to a second lower space between the upper blasting protector on which the mucks are stacked and the upper blasting protector on which the mucks are removed by moving the upper blasting protector on which the mucks are removed, and wherein two of the plurality of blasting protectors are spread and the loading and carrying of mucks in the muck car is through or between the two spread blasting protectors.