設計施工の手引き - page 3

目 次
1. タフグリーン工法の概要 ................................................................................................... 1
1. 1 特徴 ............................................................................................................................. 1
1. 1. 1 開発経緯 .............................................................................................................. 1
1. 1. 2 適用範囲 .............................................................................................................. 2
1. 2 従来技術との比較 ....................................................................................................... 3
1. 3 解説 ............................................................................................................................. 4
1. 3. 1 植生基盤 .............................................................................................................. 4
1. 3. 2 補強短繊維 .......................................................................................................... 5
1. 3. 3 土壌侵食防止マット ............................................................................................ 7
1. 3. 4 肥料 ..................................................................................................................... 9
2. 設計・施工の流れ ............................................................................................................ 10
3. 計画・調査 ........................................................................................................................11
3. 1 緑化目標 .....................................................................................................................11
3. 1. 1 緑化目標の種類 ..................................................................................................11
3. 1. 2 緑化目標と法面勾配 .......................................................................................... 12
3. 2 調査 ........................................................................................................................... 13
3. 3 調査項目の説明 ......................................................................................................... 14
3. 3. 1 土壌物理性 ........................................................................................................ 14
3. 3. 2 土壌化学性 ........................................................................................................ 15
4. 設計 .................................................................................................................................. 17
4. 1 適用範囲 .................................................................................................................... 17
4. 2 工法の位置づけ ......................................................................................................... 17
4. 3 種子配合（播種工）.................................................................................................. 18
4. 3. 1 種子配合設計 ..................................................................................................... 18
4. 3. 2 種子配合計算 ..................................................................................................... 19
4. 4 基盤厚の選定............................................................................................................. 21
4. 5 強酸性土壌対策 ......................................................................................................... 22
4. 5. 1 強酸性土壌とは ................................................................................................. 22
4. 5. 2 測定用語解説 ..................................................................................................... 22
4. 5. 3 一般的な強酸性土壌対策................................................................................... 23
4. 5. 4 中和材 ................................................................................................................ 23
4. 5. 5 強酸性土壌対策選定フロー ............................................................................... 24
4. 6 生育判定 .................................................................................................................... 25
4. 6. 1 播種工（外来草本種使用時） ........................................................................... 25
4. 6. 2 自然侵入促進工・森林表土利用工・採取種子利用工 ....................................... 26
5. 施工 .................................................................................................................................. 27
5. 1 使用機械 .................................................................................................................... 27