テコレップシステムの換気性状と粉塵飛散抑制効果
超高層建物閉鎖型解体工法「テコレップシステム」は，屋根が無い従来型の解体工法と比べて，解体時に発生する粉塵の近隣への飛散量を低減する効果が期待できる。本研究では，本工法が適用された超高層建物の解体工事を対象に，実測と数値解析により作業空間内部の換気性状と外部への粉塵飛散抑制効果を検討した。屋根の外周部に設けた換気開口から，作業環境を維持するための自然換気が適切に行われている一方で，開口部まで粉塵が上昇する過程で質量の大きい粉塵が重力沈降を起こし，総発塵量の80%以上が閉鎖空間内で回収されていることを確認した。
| キーワード： | 閉鎖型解体工法，高層建物，換気，粉塵，実測，数値解析 |
＊１ 技術センター 建築技術研究所 環境研究室
＊２ 技術センター 建築技術開発部 建築生産技術開発室
Ventilation and Dust Reduction Effect of the TECOREP System
An enclosed demolition method, the TECOREP System, is expected to reduce the dispersion amount of airborne particulate caused by demolition works. This paper describes ventilation performance of this system and reduction effects of dust dispersion based on field measurements and numerical simulations. Our results showed that natural ventilation was promoted at openings that were designed in the border of the roof. Moreover, the amount of airborne particulate was decreased by the effect of gravitational sedimentation. It was confirmed that 80 percent of the airborne particulate of the total dust produced by demolition works were deposited inside the enclosed space.
| Keywords: | enclosed demolition method, high-rise building, ventilation, dust, field measurement, numerical analysis |
*1 Environmental Engineering Research Section, Building Engineering Research Institute, Technology Center
*2 Construction Technology Development Section, Building Technology Development Department, Technology Center