Guide steel support and method of placing steel support

摘要

Problem to be solved: to provide a guide steel support which can easily and quickly adjust the positions of the right and left joint plates as compared with the prior art, and a building method using the same.The guide steel support GS is a steel support used for the primary covering of the tunnel, and has a guide body 100 attached to the joint plate.The guide body 100 has an upper guide plate and an edge guide plate formed with a refractive portion as a boundary.This upper guide plate extends from the opening side toward the turn side.When the upper end portion of the other joint plate is abutted against the upper guide plate at the time of use, and the side end portion on the side of the edge abuts against the side guide plate, the connection bolt BT can be inserted into the bolt hole of both the joint plates.Diagram