TWO-SIDE SEMICIRCLE ARCH TYPE LEADING PIPE AND STRUCTURE OF NON-EXCAVATION TYPE TUNNEL USING THEREOF AND METHOD OF CONSTRUCTING THEREOF

摘要

[Technical field/solution task] The present invention relates to a double-sided half-circle arch lead pipe, a non-cracked tunnel structure using the same, and a construction method thereof.When propulsion of a bit is difficult due to an underground obstacle during excavation of a shield machine of a steel pipe, a problem occurs next to the steel pipe in order to remove the underground obstacle. It is to solve the problem of having to install a new steel pipe in the hole. [Solution] The method of constructing a non-cracked tunnel structure according to the present invention includes the steps of: (a) forming a propulsion base and a reaching base by performing excavation on both sides of the tunnel to be constructed; (b) installing a propulsion frame in the propulsion base, and disposing a double-sided semi-circular arched lead pipe and a leading pipe press-fitting device; (c) Construct the double-sided semi-circle arch-type lead pipe on one or both upper portions of the tunnel to be constructed, and excavate the double-sided semi-circle arch-type lead pipe with the lead pipe press-fitting device while excavating inside the double-sided semi-circle arch-type lead pipe. Pushing the push-in; (d) Drilling device by inserting a T-shaped propulsion connection guide protruding in the longitudinal direction at the top and bottom of the double-sided semicircular arch lead pipe into the T-shaped guide hole of the guide connecting member protruding longitudinally outside the roof steel pipe, respectively. Press-fitting and pushing the roof steel pipe by the pipe propulsion method; And (e) the roof steel pipe is connected to each other along the ceiling wall and the side wall of the tunnel, and a T-shaped propulsion connection guide protruding from the outside of the roof steel pipe in the longitudinal direction is formed protruding from the outside of the other roof steel pipe in the longitudinal direction. It includes; inserting it into the T-shaped guide hole of the guide connecting member and pushing it in through a tube propulsion method using an excavation device. [Benefit] According to the present invention, when it is difficult to propel a bit due to an underground obstacle during excavation of a shield machine of a roof steel pipe, the underground obstacle can be easily removed through the already excavated lead pipe or the roof steel pipe. In addition, by forming the upper end of the tip of the lead pipe as an inclined surface, it is possible to prevent the soil from collapsing and flowing into the inside when soil is laid, and to prevent ground subsidence in the upper part.