Abstract:
PROBLEM TO BE SOLVED: To provide an exfoliation protective structure of a tunnel or the like, configured to be suitable for repairing an existing tunnel, to be easily constructed at a low cost with a simple configuration, to reinforce a bulkhead such as a lining wall inner surface of the tunnel for preventing exfoliation, to improve heat insulation and heat retention performance of the bulkhead for preventing icicles or frozen dew, to ensure safety of a vehicle traveling in the tunnel, and to effectively prevent water leakage according to water leakage condition of the bulkhead.SOLUTION: An exfoliation protective structure of a tunnel or the like, is formed by fixing a plurality of synthetic resin reinforcing plates 7 to an inner face of a bulkhead 4. The reinforcing plate 7 has a hollow structure formed by arranging synthetic resin reinforcing projections 11 inside. On both sides of the reinforcing plates 7 holding the reinforcing projections 11, synthetic resin liner plates 8, 9 are arranged.
Abstract:
PROBLEM TO BE SOLVED: To provide a transparent reinforcing-sheet with which a cracking portion of a deteriorated concrete construction is repaired or reinforced and then it can be visually observed whether a defect such as cracking of the concrete construction is progressed in the repaired or reinforced portion.SOLUTION: A transparent composite sheet for repairing or reinforcing a concrete construction of which the visible light transmissivity is 80% or more, comprises: (i) a gas non-permeable layer configured by curing a soft curable transparent resin composition (A); at least one layer of (ii) a transparent biaxial drawing film of which one-side surface is laminated on the gas non-permeable layer and in which a round hole having an inner diameter of 1 to 2 mm is deployed continuously in a zigzag manner at 60° or 45° and an aperture of the round hole is 5 to 30%; and (iii) a transparent main body resin layer configured by curing a soft curable transparent resin composition (B) having compatibility with the gas non-permeable layer so as to fill the round hole part of the biaxial drawing film and to cover another-side surface of the biaxial drawing film.