| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique capable of more suppressing cracking of lining concrete in an upper surface part of a tunnel. <P>SOLUTION: A construction method of tunnel lining includes placing steps of a side wall part, an arch part, and an upper surface part. In the placing step of the upper surface part among the placing steps, placing of the upper surface part is carried out by a step of placing lower layer concrete located from the lower part of the upper surface part to an openable/closable window part 62 provided inside the upper part by press-fitting concrete from below of the upper surface part, a step of placing middle layer concrete located from the window part 62 to a predetermined height by further press-fitting concrete from below of the upper surface part after closing the window part 62, and a step of placing upper layer concrete in a region higher than the predetermined height by press-fitting concrete from the inside of the upper part of the upper surface part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
