道路土工の基礎知識と最新技術(令和5年度版)
【A4判

208頁

本体価格 4,000円】

令和6年3月29日初版第１刷発行

目
第１編

次

道路土工の基本··················································· 1- 1

１．道路土工の特徴··················································· 1- 1

２．基本的な考え方··················································· 1- 5

第２編

道路土工における不確実性の段階的な低減··························· 2- 1

１．道路土工の地質・地盤リスクマネジメント··························· 2- 1

２．地質・地盤リスクマネジメントの方法······························· 2- 5

３．道路土工でのトラブル要因と地形・地質および発生災害の分析
３－１ 平野部でのトラブル要因と地形・地質························ 2- 7

３－２ 丘陵～山地部でのトラブル要因と地形・地質
３－３ 平野部でのトラブルの発生要因分析·················· 2- 7·························· 2-11

３－４ 丘陵～山地部でのトラブルの発生要因分析
資料········· 2- 7···················· 2-15

土木事業で地形・地質に対する理解が不足したため発生したトラブル事例··············································· 2-18

１ 支持層問題に関するトラブル事例······························ 2-18

２ 沈下，変形問題に関するトラブル事例·························· 2-23

３ 安定問題に関するトラブル事例································ 2-31

４ 液状化問題に関するトラブル事例······························ 2-35

５ 洗掘，浸食などの問題に関するトラブル事例···················· 2-37

６ その他のトラブル事例·········································· 2-38第３編

i-Construction，ICT 土工の取り組み

１． i-Construction について································ 3- 1··········································· 3- 1

１－１ i-Construction の概要······································· 3- 1

１－２ ICT 施工とは（ICT 施工を支える要素技術）····················· 3- 4
１－３ さまざまな工種への展開（ICT 施工の適用工種） ················ 3- 6
１－４ 普及状況（技術基準と工種展開）······························ 3-11
２． i-Construction，ICT 土工の取り組み································ 3-13

２－１ ICT 土工（MC，MG）（バックホウ，ブルドーザ，ローラ，グレーダ）··········· 3-13
２－２ UAV 測量・出来形管理
２－３ ICT 地盤改良工
３．今後の展望······································ 3-18············································ 3-19······················································· 3-20

３－１ 建設機械施工の自動化・遠隔化に向けた取り組み
３－２ ICT 施工に求められること·············· 3-20·································· 3-22－ i －第４編

建設発生土の利活用

１．はじめに··············································· 4- 1························································· 4- 1

２．建設発生土の利用················································· 4- 2２－１ 建設発生土の定義·········································· 4- 2２－２ 建設発生土利用の現状と課題の整理·························· 4- 6

２－３ 建設発生土の有効利用促進における課題
２－４ 建設発生土の利用促進に関する施策
３．盛土規制法施行の道路土工への影響·························· 4-15································· 4-19

３－１ 盛土規制法の公布と関係法令の改正
３－２ 道路土工への影響······················ 4- 7·························· 4-19·········································· 4-25

４．建設発生土の利用促進と利用事例··································· 4-27

４－１ 情報共有システム等を活用した利用調整
４－２ 建設発生土の有効利用事例
第５編

ブロック積擁壁について

１．はじめに······················ 4-27·································· 4-33··········································· 5- 1························································· 5- 1

２．ブロック積擁壁の構造の概要······································· 5- 1

２－１ ブロック積擁壁の一般的な構造······························ 5- 1２－２ 擁壁工指針におけるブロック積擁壁の分類と設計法············ 5- 2２－３ 積みブロックの構造········································ 5- 4３．ブロック積擁壁の変状形態········································· 5- 7４．ブロック積擁壁の構造上の留意点··································· 5-10４－１ 通常のブロック積（石積）擁壁······························ 5-10４－２ 通常のブロック積（石積）擁壁に準じた構造の大型ブロック積擁壁········································ 5-12

４－３ もたれ式擁壁に準じた構造の大型ブロック積擁壁
５．ブロック積擁壁の施工の基本と留意点
第６編······························· 5-18

道路土工の維持管理に関する基本と最近の動向

１．道路土工構造物の維持管理の基本的な考え方
２．道路土工構造物の点検·············· 5-16······················· 6- 1························· 6- 1············································· 6- 3

３．点検結果からみえる道路土工構造物の現状··························· 6- 8４．道路土工構造物の点検を取り巻く最近の動向························· 6-13

第７編

豪雨・地震等における被災概要と対策事例

１．はじめに··························· 7- 1························································· 7- 1

２．近年の道路土工構造物の被災の特徴································· 7- 2

２－１ 近年の自然災害による被害·································· 7- 2

２－２ 近年の豪雨による被災形態·································· 7- 6２－３ 被災事例を踏まえた指針類等への反映内容－ ii －···················· 7- 6

３．被災形態毎の被災概要と対策事例··································· 7- 7

３－１ 豪雨による道路土工構造物の洗掘に伴う復旧（国道41 号 岐阜県下呂市）································ 7- 7

３－２ 豪雨による横断排水施設の閉塞に伴う盛土の崩壊と復旧（国道 274 号 北海道清水町）································· 7-11
３－３ 豪雨による地すべりで被災した道路土工構造物の復旧（国 道 9 号 島根県出雲市）··································· 7-16３－４ 福島県沖地震における盛土変状に伴う早期復旧（常磐自動車道新地ＩＣ付近）································ 7-22３－５ 供用後短期間で変状が生じた切土のり面の事例（北近畿豊岡自動車道 兵庫県豊岡市） ························· 7-26
３－６ 通常の維持管理にて発見した盛土変状に伴う復旧（秋田自動車道秋田中央ＩＣ付近）···························· 7-32
３－７ 岩盤崩壊による道路土工構造物の被災事例（国道 229 号 北海道乙部町）································· 7-36
４．横断排水施設流入口の閉塞軽減対策··································· 7-43
４－１ 横断排水施設流入口の閉塞軽減対策の必要性
４－２ カルバート流入口の閉塞対策の基本方針
４－３ 閉塞軽減施設の設置·················· 7-43······················ 7-45········································ 7-46

－ iii －