| 摘要 |
PURPOSE: A casing drawing-type cast-in place pile method after concrete curing of a front end is provided to secure safety of the pile foundation and the whole structure by precisely constructing a cast-in place pile regardless of conditions of the ground. CONSTITUTION: A casing drawing-type cast-in place pile method after concrete curing of a front end comprises steps for forming an excavating hole in a sediment layer(11) by intruding a casing(30) and excavating the sediment contained in the casing with a sediment excavator(S10); pulling out the sediment excavator with leaving the casing to keep a borehole after completing the excavation to a planned penetration(S20); forming the front end of the pile by pouring concrete(33) into the casing and drawing the casing at the predetermined distance to closely contact the lower end of the casing and the surface of the concrete(S41); preventing the settlement of the casing by mounting a casing support(50) on the casing exposed to the ground, putting a stiffener(31) in the casing after mounting a stiffener support(40) to the upper end of the casing, and fixing the upper end of the stiffener to the upper end of the casing through the stiffener support(S42); curing the front end of the pile with fixing the casing and the stiffener by the casing and stiffener supports(S43); and dismantling the stiffener and casing supports after completing the curing of the front end and forming a pile body by pulling out the casing, injecting a filler(34) in the casing, and filling the excavating hole(S51). |
