Sound insulation construction method for tunnel soundproof doors and sound insulation structure for tunnel soundproof doors

摘要

PROBLEM TO BE SOLVED: To provide a sound insulation structure of a soundproof door 20 of a tunnel 10 capable of improving the sound insulation performance of the soundproof door 20 in a wide low frequency band. SOLUTION: The sound insulation structure of a soundproof door 20 of a tunnel 10 is such that a first fixing plate 60 extending upward from an upper end 32 of a vehicle door 30 provided in the soundproof door 20 and a first fixing plate 60 are fixed to the soundproof door 20. First bolt 62 and the like. Further, the soundproof structure of the soundproof door 20 of the tunnel 10 includes a second fixing plate 70 extending downward from the lower end 34 of the vehicle door 30 and a second bolt 72 for fixing the second fixing plate 70 to the base concrete 40. Including. [Selection diagram] Fig. 1