EFFECTS OF CYCLIC VERTICAL LOADING ON BEARING CAPACITY AND PULL-OUT RESISTANCE OF A PILE WITH OR WITHOUT SPIRAL WINGS
正負交番鉛直荷重がスパイラル状の羽根を有する回転杭および直杭の鉛直支持力・引抜き抵抗力に与える影響

Masatoshi WADA, Kohji TOKIMATSU, Masamichi SAWAISHI
2016 Journal of Structural and Construction Engineering (Transactions of AIJ)  
In order to estimate the effects of cyclic loading on bearing capacity and pull-out resistance of piles, monotonic and cyclic vertical loading tests were conducted on a pile with or without spiral wings in uniformly graded sand in a calibration chamber. Both pushing and pulling shaft friction decreased with increasing the cyclic loading force, whereas the pushing end wing and tip resistance did not decrease with increasing the cyclic loading force.
doi:10.3130/aijs.81.725 fatcat:m2rcmujccndadppty3ndafsueq