引抜試験に基づく大口径圧縮型地盤アンカーの摩擦応力度評価

摘要

大口径圧縮型地盤アンカーの摩擦応力度について，引抜試験結果 を基に検討を行った.得られた知見は次のとおりである. ①定着地盤の種類に関わらず，アンカー頭部の荷重変位は引抜きに至るまで概ね線形関係にある.摩擦応力度は定着体下部側の値が上部側の値より大きい状態で推移し，引抜き時には両者の値が等しくなり.引抜きに至る.%The ground anchor used mainly in the building structure and in the construction of earth retaining for excavation is the friction resistance type. However, it can't be said that the characteristics of that type of frictional stress are well understood. Here, we conducted the pulling tests on ground anchor of compression type with a large diameter which is also the frictional resistance type. Based on the results, we clarified the characteristics of frictional stress of that anchor in the process of pull-out and after pull-out, including the evaluation of ultimate friction stress and residual friction stress.