METHOD FOR INSTALLING CAST-IN-PLACE PILE WITH LARGE BORE IN INDEPENDENT FOUNDATION AND CAST-IN-PLACE PILE TO IMPROVE SUPPORTING FORCE AND RESISTANCE AGAINST VERTICAL OR LATERAL LOAD OF SOFT GROUND

摘要

PURPOSE: An installation method of a cast-in-place pile with a large bore in an independent foundation and the cast-in-place pile are provided to install the belling pile simply, and to improve supporting force and resistance against vertical or lateral load of the soft ground by integrally forming the bar arrangement structure with the bellows tube. CONSTITUTION: A soft ground(5) is excavated with the maximum diameter(D1) of a belling pile(BP) to be installed, and a bar arrangement structure(9) is inserted to an excavation part(7) of the soft ground. The diameter(D2) of a bell part(11) is larger than the diameter(D3) of a column part(13) of the bar arrangement structure. A wrinkle tube(15) smaller than the diameter of the bell part and larger than the diameter of the column part is mounted outside the column part, and the lower part of the wrinkle tube is placed in the upper part of the bell part. Concrete(17) is injected into the bell part and the column part of the bar arrangement structure placed under and inside the wrinkle tube. The bar arrangement structure is integrally formed with the wrinkle tube by the concrete, and the outer periphery of the belling pipe is filled and covered with earth(19).