| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology capable of economically and efficiently restraining cracking from occurring in secondary lining concrete of a tunnel.SOLUTION: A concrete layer constituting a tunnel surface layer is provided with glass fiber sheets 1 and 2. The glass fiber sheets 1 and 2 are provided along a circumferential direction of the tunnel, and provided along a direction crossing the circumferential direction. The glass fiber sheets 1 and 2 are embedded in the concrete layer. In addition, the glass fiber sheets 1 and 2 are latched to a reinforcement in the concrete layer.SELECTED DRAWING: Figure 1 |
