BUFFER CONSTRUCTION

• Main Authors: TAKAHASHI KAZUYA, DOI TETSUYA, NOZAWA GOJIRO, INAMI TAKASHI, TANIGAWA MASAKI, IWANAGA KEIICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 25.07.2016
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

PROBLEM TO BE SOLVED: To reduce an adverse effect on an area around a tunnel structure by reducing a pressure wave emitted from the tunnel structure.SOLUTION: A buffer construction 1 has a cover body 2. The cover body 2 has a passage 2a on which a vehicle C can run inside the cove body. One end of the passage 2a connects to an outside and the other end of the passage 2a connects to a mouth Tb of a tunnel T. The cover body 2 has an aperture 2c on the other end of the passage 2a, whose size and shape are the same as those of the mouth Tb of the tunnel T, and multiple pressure loss holes 5 that discharge gas generated in the passage 2a to the outside by a pressure wave. An aperture ratio of the cover body 2 by the pressure loss hole 5 is set to be higher on one end side (aperture 2b side) than the area distant from the one end side (aperture 2b side).SELECTED DRAWING: Figure 1 【課題】トンネル構造物から放射される圧力波を低減してトンネル構造物周辺への悪影響を軽減する。【解決手段】緩衝工１は、覆体２を備える。覆体２は、車両Ｃが走行可能な通路２ａを内部に有し、通路２ａの一端が外部に開放されるとともに通路２ａの他端がトンネルＴの坑口Ｔｂに接続される。覆体２は、通路２ａの他端の開口２ｃの寸法および形状が、トンネルＴの坑口Ｔｂと同一に形成されるとともに、通路２ａ内で生じた圧力波によって気体を外部に放出する圧損孔５が複数設けられる。圧損孔５による覆体２の開口率は、一端側（開口２ｂ側）から離れた部分に対して一端側（開口２ｂ側）が高くなるように設定される。【選択図】図１