A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Forward screwing impacting-expanding drill tool structure and full screw impacted-expanded pile forming construction method
The invention discloses a forward screwing impacting-expanding drill tool structure and a full screw impacted-expanded pile forming construction method, and particularly relates to a drill tool structure for secondary screwing during forward drill lifting and pile forming, and a construction method of a full screw impacted-expanded pile for soil squeezing. The pile forming construction method comprises the following steps of utilizing a spiral drill tool with the drill tool structure to downwards spiral to squeeze soil and form a hole, then maintaining the rotation direction to be unchanged, lifting the drill tool and impacting-expanding a pile hole, forming shallow threads on a hole wall, meanwhile, pumping concrete to the pile hole, and forming a full screw impacted-expanded cast-in-place pile with the shallow threads. The invention aims to provide the screwing impacting-expanding drill tool structure with simpler structure and durability, and the full screw impacted-expanded cast-in-place pile forming construction method with higher bearing force, more stable quality, lower cost, energy conservation and environment protection, simplicity and practicability, and adaptability of various soil layers.
Forward screwing impacting-expanding drill tool structure and full screw impacted-expanded pile forming construction method
The invention discloses a forward screwing impacting-expanding drill tool structure and a full screw impacted-expanded pile forming construction method, and particularly relates to a drill tool structure for secondary screwing during forward drill lifting and pile forming, and a construction method of a full screw impacted-expanded pile for soil squeezing. The pile forming construction method comprises the following steps of utilizing a spiral drill tool with the drill tool structure to downwards spiral to squeeze soil and form a hole, then maintaining the rotation direction to be unchanged, lifting the drill tool and impacting-expanding a pile hole, forming shallow threads on a hole wall, meanwhile, pumping concrete to the pile hole, and forming a full screw impacted-expanded cast-in-place pile with the shallow threads. The invention aims to provide the screwing impacting-expanding drill tool structure with simpler structure and durability, and the full screw impacted-expanded cast-in-place pile forming construction method with higher bearing force, more stable quality, lower cost, energy conservation and environment protection, simplicity and practicability, and adaptability of various soil layers.
Forward screwing impacting-expanding drill tool structure and full screw impacted-expanded pile forming construction method
LIU MIAO (author) / LIU ZHAOYUN (author)
2015-05-06
Patent
Electronic Resource
English
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