トンネル換気設計要領

２０２０年９月

阪神高速道路株式会社

トンネル換気設計要領

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目

次第１章
総 則 ......................................................................................................... 1.1
１．１ 適用 ............................................................................................................ 1.1
１．２ 換気計画の要点........................................................................................... 1.1
１．３ 用語の定義 .................................................................................................. 1.1
１．４ 取扱空気，各種定数・記号 ......................................................................... 1.2（１）換気計算に用いる単位 ............................................................................ 1.2（２）空気の流れに関する設定条件.................................................................. 1.3（３）空気の性質 .............................................................................................. 1.3（４）各種定数 .................................................................................................. 1.3（５）各種記号 .................................................................................................. 1.3
第２章 調査計画 ......................................................................................................... 2.1
２．１ 調査 ............................................................................................................ 2.1（１）交通調査 .................................................................................................. 2.1（２）交通量 ..................................................................................................... 2.1（３）大型車混入率........................................................................................... 2.1（４）気象調査 .................................................................................................. 2.1（５）地形・地質・地物調査 ............................................................................ 2.2（６）土地利用・環境条件 ................................................................................ 2.2２．２ 計画 ............................................................................................................ 2.3
２．２．１計画の手順........................................................................................... 2.3（１）計画条件 .................................................................................................. 2.4（２）換気量の算定........................................................................................... 2.4（３）換気方式の検討 ....................................................................................... 2.4（４）換気施設の設計 ....................................................................................... 2.5
２．２．２ 換気設計に用いる交通量.................................................................. 2.6（１）換気設計交通量 ....................................................................................... 2.6（２）設計交通容量........................................................................................... 2.9（３）設計時間交通量 ..................................................................................... 2.11（４）大型車混入率......................................................................................... 2.14（５）換気計算に用いる走行速度 ................................................................... 2.14２．２．３ 段階建設および経済比較................................................................ 2.17（１）段階建設 ................................................................................................ 2.17（２）経済比較 ................................................................................................ 2.18第３章
換気方式 ..................................................................................................... 3.1
３．１ 換気の目的 .................................................................................................. 3.1
３．２ 換気方式の種類と特徴 ................................................................................ 3.2
３．３ 換気方式の選定........................................................................................... 3.8（１）概要 ......................................................................................................... 3.8（２）換気方式の選定手順 .............................................................................. 3.10
第４章 換気対象物質 .................................................................................................. 4.1
４．１ 換気対象物質及び排出量 ............................................................................ 4.1（１）換気対象物質........................................................................................... 4.1（２）有害成分の排出量 ................................................................................... 4.2
４．２ 設計濃度 ..................................................................................................... 4.5（１）煤煙設計濃度........................................................................................... 4.5（２）一酸化炭素設計濃度 ................................................................................ 4.6

トンネル換気設計要領／目次第５章 換気計算 ......................................................................................................... 5.1
５．１ 換気計算の一般的留意事項 ......................................................................... 5.1（１）計算条件と精度 ....................................................................................... 5.1（２）非圧縮性流体........................................................................................... 5.1（３）定常流 ..................................................................................................... 5.1（４）空気の性質 .............................................................................................. 5.1（５）風速・圧力の変化 ................................................................................... 5.1（６）昇圧力と昇圧係数 ................................................................................... 5.2（７）壁面摩擦損失係数と入口損失係数 .......................................................... 5.2（８）換気量計算における一般的注意事項 ....................................................... 5.2（９）交通渋滞時の換気量について.................................................................. 5.3（１０）都市トンネルにおける換気の設計濃度と換気量 ................................. 5.3（１１）火災時の排煙との関係 ......................................................................... 5.3（１２）取入空気の汚染状態について .............................................................. 5.3５．２ 換気量の算定 .............................................................................................. 5.4（１）換気量の算定式 ....................................................................................... 5.4（２）排出量および排出量の補正 ..................................................................... 5.5（３）所要換気量の計算 ................................................................................... 5.7５．３ 自然換気 ................................................................................................... 5.10（１）自然換気力 ............................................................................................ 5.10（２）交通換気力 ............................................................................................ 5.11（３）交通換気図 ............................................................................................ 5.15（４）渋滞走行時の換気 ................................................................................. 5.17５．４ 機械換気 ................................................................................................... 5.19
５．４．１ 縦流換気方式 ................................................................................. 5.19（１）ジェットファン方式 .............................................................................. 5.19（２）サッカルド方式 ..................................................................................... 5.22（３）集中排気方式......................................................................................... 5.24
５．４．２ 横流及び半横流方式 ....................................................................... 5.36（１）送・排風機の所要全圧 .......................................................................... 5.36（２）換気系各部の圧力計算 .......................................................................... 5.38
第６章 換気ダクト ..................................................................................................... 6.1
６．１ 換気ダクトの種類と断面計画 ..................................................................... 6.1（１）トンネルダクト ....................................................................................... 6.1（２）連絡ダクト .............................................................................................. 6.1（３）換気所内ダクト ....................................................................................... 6.1
６．２ 換気ダクトの計画,設計 ............................................................................... 6.3（１）換気ダクトに関する一般的留意事項 ....................................................... 6.3（２）車道上部トンネルダクトの構造 .............................................................. 6.5（３）送・排気口 .............................................................................................. 6.5（４）送・排気ノズル ....................................................................................... 6.6（５）開閉装置 .................................................................................................. 6.7（６）コーナーベーン ....................................................................................... 6.7
６．３ 各種ダクトの損失係数…………………………………………………………..6.8（１）直管の摩擦損失 ....................................................................................... 6.8（２）曲管と屈折管の損失 ................................................................................ 6.9

トンネル換気設計要領／目次（３）ベーン付曲がり管または屈折管 ............................................................ 6.10（４）連続曲管または屈折管 .......................................................................... 6.13（５）縮小管と拡大管 ..................................................................................... 6.14（６）分岐管及び合流管 ................................................................................. 6.15（７）管路の出入口，その他 .......................................................................... 6.15