| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To perform welding successively also on an installation range including a sump when successively welding steel plates along the axial direction and joining them within a tunnel in a tunnel steel plate lining repair construction. <P>SOLUTION: According to a special invert method for a tunnel steel plate lining repair construction, a sump which collects inflow water is provided on a bottom part in the middle of a tunnel 10 in the axial direction and while draining water from the sump, steel plates of an invert material to be joined to a bottom side within the tunnel 10 and a crown material 40 to be joined to a top side are joined by successively welding a circumferential abutment end portion and an axial abutment end portion, thereby repairing the tunnel 10. In an installation range including the sump, a special invert material 30 is joined. With the special invert material 30, a drainage pit 32 is formed which includes an opening 34 which is formed through a bottom surface part at a position corresponding to the sump, and an opening/closing manhole 36 which is disposed lower than the opening 34. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
