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DRILLING BLADE MOUNTING STEEL PIPE FOR CONSTRUCTING CAST-IN-PLACE CONCRETE PILE AND CONSTRUCTION METHOD OF CAST-IN-PLACE CONCRETE PILE
DRILLING BLADE MOUNTING STEEL PIPE FOR CONSTRUCTING CAST-IN-PLACE CONCRETE PILE AND CONSTRUCTION METHOD OF CAST-IN-PLACE CONCRETE PILE
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机译：钻孔灌注桩施工现场浇筑混凝土桩的方法及施工方法
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摘要
PROBLEM TO BE SOLVED: To provide a drilling blade mounting steel pile for constructing a cast-in-place concrete pile capable of constructing a concrete pile for ground reinforcement with stable quality without being affected by a state of soil at a site and reliably constructing the concrete pile while facilitating construction work at the site.;SOLUTION: A drilling blade mounting steel pipe 1 has: a steel pipe 10; and a tip drilling blade 20 which is detachably attached to a tip of the steel pipe with a drilling blade body 22 installed on a tip face thereof. The steel pipe 10 also has protrusions 13 which are inwardly protruded from an inner periphery at a tip thereof. The tip drilling blade 20 has: rotation support sections 23a which contact the protrusions 13 and enable the tip drilling blade 20 to rotate together with the steel pile 10 when the same is rotated in a predetermined rotation direction; and separation restriction sections 23b which are installed at the tips of the rotation support sections 23a and restrict the tip blade 20 from being separated from the steel pile 10 in an axial direction by engaging with surfaces of the protrusions 13 at a side opposite to the tip of the steel pile 10.;COPYRIGHT: (C)2015,JPO&INPIT
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