| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a construction method of a steel pile for construction of a consolidation part of foundation at a pile tip part, which can obtain high workability as well as high tip bearing capacity while suppressing the amount of excavated soil without lowering the economical efficiency. <P>SOLUTION: In a construction method of a steel pile, a consolidation part of foundation is constructed at a pile tip part by jetting water or a flowable solidification material from nozzles for driving direction provided at the pile tip part, with the driving direction of the steel pile set as a jetting direction, and from nozzles for outward direction provided at the pile tip part, with the horizontally outward direction or an obliquely outward direction being an angle between the driving direction of the steel pile and the horizontally outward direction set as a jetting direction, according to the depth of the pile tip part, which moves vertically in the driving direction accompanying the progress of construction, from a ground surface, or the foundation strength. The consolidation part of foundation is constructed by controlling one or more of the injection pressure, injection quantity, injection time, and injection timing of the water or the flowable solidification material jetted from the nozzles for outward direction independently of the nozzles for driving direction. <P>COPYRIGHT: (C)2013,JPO&INPIT |
