| 摘要 |
PROBLEM TO BE SOLVED: To increase a sound isolating effect by forming a soundproof wall and a soundproof door main body with a sound isolating panel made of a thick steel product. SOLUTION: An arch 1 is formed at the entrance of a tunnel. A soundproof wall 2 is provided on an opening section 3 at the center of the soundproof wall 2, an opening section 3 is opened at the center of the soundproof wall 2, and a pair of soundproof door main body 4 are fitted to the opening section 3. Multiple sound isolating panels 6 made of a lining plate are arranged between the columns 5 of the soundproof wall 2 with both end pinched, and the columns 5 are connected by multiple braces 7 and sash bars 8. The lining plate used for the sound isolating panels 6 is a weldable thick steel product having high rigidity capable of supporting a vehicle load, and a strong structure can be obtained when the lining plate is integrated with the column 5 by welding. The width of the column 5 is made larger than the thickness of the sound isolating panel 6, and its back face is lined with sprayed concrete. A sound isolating effect is increased, and the deformation of soundproof doors can be suppressed.
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