斜面工事における被災防止のための崩壊モニタリングについて

摘要

本研究ではトレードオフの関係にある建設現場の安全性と経済性の問題について，従来のハード的対策による崩壊抑止からソフト的対策による被災防止を検討した．この検討では労働者の迅速な避難に焦点を当て，斜面の動きを簡易に計測できる装置を試作した．本論文では災害事例に基づいて斜面工事における安全上の問題点を考察し，次いで試作した計測装置の概要を述べる．そして，実大模型実弓削こよる検知性能の評価に基づいて，施工時斜面の崩壊監視に対する適用性を考察する．%Slope failures frequently cause labour accidents at construction sites. It is also known that even a small collapse can cause serious injury to workers. Temporary retaining walls are needed to support slopes at the works. In addition, practice of immediate escape is also important to save workers' lives, and warning must be given prior to failure. A simplified monitoring device, the Short Pipe Strain transducer (SPS), was developed to measure the increment of shear deformation in shallow section of slopes, and its applicability was investigated through prototype model tests. It was clarified that a couple of minutes' time could be provided for escape by identifying the increment of shear deformations in the shallow section of slopes.