Construction method to prevent lower movement of small pipes that transfer the upper load of the steel composite concrete for tunnel excavation to the lower part

摘要

The present invention relates to a tunnel construction method using an earth pressure support member installed between a steel pipe and a steel pipe to be press-fit to construct an underground non-crackable steel composite concrete tunnel, and in more detail, after removing the soil between the steel pipe and the steel pipe The upper fixing plate is welded to the upper part of the incision between the cut steel pipe and the steel pipe, and the lower fixing plate is installed at the bottom of the cut-out part where the upper fixing plate is installed, along with the earth pressure support pipe with the movement preventing member inserted at the lower end, and welded to attach the earth pressure support member. And installing a first joint member and a second joint member between the earth pressure support pipe and the earth pressure support pipe of the earth pressure support member, and by installing a third joint member on the upper inner surface of the pressed steel pipe, the present invention (A) Even after curing, the earth pressure support member and the concrete poured inside the steel pipe and the joint member maintain a close adhesion state, and the concrete is cured while maintaining the adhesion state with the earth pressure support member ceiling inner surface and the steel pipe ceiling, so that the tunnel structure needs to be maintained for a certain period of time. The present invention relates to a construction method for preventing the movement of the lower part of a small pipe that transmits the upper load of the steel composite concrete for excavation in an underground tunnel that has the durability of