PILE HOLDING BODY FOR PULLING OUT UNDERGROUND PILE AND UNDERGROUND PILE PULLING OUT METHOD USING PILE HOLDING BODY

To provide a pile holding body for pulling out underground pile which safely and surely pulls out an underground pile even when it is difficult that a sling wire is hooked on the pile and is pulled out, and an underground pile pulling out method.SOLUTION: Gap parts 14 are provided at side face symmetric positions of a vertically opened base cylinder, a movable cylinder that is vertically slide movable along the outer peripheral surface of the base cylinder is provided on the outer part of the base cylinder, a pair of pile holding arms 7 that are rotatably pivoted upward on the lower outer surface of the base cylinder are provided in the gap parts, and the lower parts of a pair of upward support arms 11 are pivoted on the outer surface of the movable cylinder so as to be rotatable with a shaft 12 and are pivoted so as to be rotatable with a shaft 13 penetrating mutually the pile holding arms 7 and the vicinity of the upper parts of the support arms 11. On the other hand, vertically extending long hole-shaped gaps are provided the side faces of the movable cylinder at a position different from positions in plan view of each of the arms and a stopper is projected on the outer peripheral surface of the base cylinder, the stopper is positioned in the gap, and thereby a distance between tips of the pile holding arms 7 is allowed to be varied by lifting the movable cylinder to the base cylinder.SELECTED DRAWING: Figure 6 【課題】玉掛けワイヤーを杭に掛けて引き抜くことが困難な場合でも，安全確実に地中杭を引き抜く地中杭引抜き用杭保持体並びに地中杭引抜き方法を提供する。【解決手段】上下開放する基筒の側面対称位置に空隙部１４を設け、該基筒外周面に沿って上下にスライド移動可能な可動筒を基筒外方に設け、基筒の下部外面にて回動可能に上向きに軸支される一対の杭保持アーム７を上記空隙部内に設け、可動筒外面に一対の上向きのサポートアーム１１の下部を、軸１２にて回動可能に軸支し、上記杭保持アーム７とサポートアーム１１上部近傍を互いに貫通する軸１３にて、回動可能に軸支する。一方、上記各アームの平面視位置とは別位置の可動筒側面に上下に延びた長穴状の空隙を設けるとともに、基筒外周面にストッパーを突設し、該ストッパーを該空隙内に位置させることにより、基筒に対する可動筒の昇降にて杭保持アーム７先端間距離の可変を可能とする。【選択図】図６