METHOD FOR CONSTRUCTING LINEAR SUPPORT MEMBER OF LARGE-SECTION TUNNEL HAVING SMALL FLATTENING

摘要

The present invention relates to a method for constructing a tunnel ground reinforcement using a linear support member, and a waterproof sheet, and a lining and a ventilation structure in a large-section tunnel having a small flattening. The method relates to constructing a linear support member in a large-section tunnel having a small flattening, a linear support member is installed, wherein the length (L2) of the linear support member (5) to be installed in a virtual reference tunnel having a virtual excavation surface (200) with a 0.5 width maximum-height flattening, and the length (L1) of the linear support member (5) connected between the actual excavation surface (100) and the virtual excavation surface (200) from the actual excavation surface (100) having a less than 0.5 width maximum-height flattening, are longest at the roof part that is formed additionally longer because a width maximum-height flattening is low and get shorter as they approach both sides of a side wall part.