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A platform for research: civil engineering, architecture and urbanism
Construction method of direct circulation cast-in-place pile of percussion drill
The invention provides a construction method for a direct circulation cast-in-place pile of a percussion drill, and relates to the technical field of cast-in-place pile hole-forming construction.The construction method comprises the steps that a pile casing is buried, a foundation at the bottom of the pile casing is filled with clay in a replaced mode, the clay is tamped, and the outer wall of the pile casing is backfilled with the clay and tamped in a layered mode; a percussion drill is erected on one side of the pile casing, and a percussion bit of the percussion drill extends into the pile casing for drilling; a direct circulation deslagging system is arranged on one side of the pile casing, and the direct circulation deslagging system is connected with the percussion bit; slag is discharged in a hole drilled by the percussion bit in a direct circulation mode, and slurry flows back upwards and enters a direct circulation slag discharging system; a reinforcement cage is hung in the hole, and hole cleaning and slurry changing treatment is conducted on the interior of the hole; and concrete pouring is conducted in the hole where the reinforcement cage is placed to form a pile, and the pile casing is taken out. The technical problem that in the prior art, in some geologically poor rock stratums, slag needs to be dredged through a slag dredging barrel after hole forming is conducted in the hole forming process, and direct slag discharging cannot continue to be conducted in the hole drilling process is solved.
本发明提供一种冲击钻正循环灌注桩的施工方法，涉及灌注桩成孔施工的技术领域，包括：将护筒埋设，在护筒底部地基换填黏土夯实，且在护筒外壁回填黏土并分层夯实；在护筒的一侧架设冲击钻机，冲击钻机的冲击钻头伸入护筒内进行钻孔；在护筒的一侧设置正循环排渣系统，并将正循环排渣系统与冲击钻头连接；在冲击钻头钻出的孔内通过正循环的方式排渣，并使泥浆上返流出进入正循环排渣系统；在孔内吊放钢筋笼，并对孔内进行清孔换浆处理；对放置有钢筋笼的孔内进行混凝土浇筑成桩，并将护筒取出。本发明解决了现有技术中一些地质较差的岩层存在的在造孔过程中需要在造孔后通过捞渣筒捞渣，而无法在钻孔过程中继续进行直接排渣的技术问题。
Construction method of direct circulation cast-in-place pile of percussion drill
The invention provides a construction method for a direct circulation cast-in-place pile of a percussion drill, and relates to the technical field of cast-in-place pile hole-forming construction.The construction method comprises the steps that a pile casing is buried, a foundation at the bottom of the pile casing is filled with clay in a replaced mode, the clay is tamped, and the outer wall of the pile casing is backfilled with the clay and tamped in a layered mode; a percussion drill is erected on one side of the pile casing, and a percussion bit of the percussion drill extends into the pile casing for drilling; a direct circulation deslagging system is arranged on one side of the pile casing, and the direct circulation deslagging system is connected with the percussion bit; slag is discharged in a hole drilled by the percussion bit in a direct circulation mode, and slurry flows back upwards and enters a direct circulation slag discharging system; a reinforcement cage is hung in the hole, and hole cleaning and slurry changing treatment is conducted on the interior of the hole; and concrete pouring is conducted in the hole where the reinforcement cage is placed to form a pile, and the pile casing is taken out. The technical problem that in the prior art, in some geologically poor rock stratums, slag needs to be dredged through a slag dredging barrel after hole forming is conducted in the hole forming process, and direct slag discharging cannot continue to be conducted in the hole drilling process is solved.
本发明提供一种冲击钻正循环灌注桩的施工方法，涉及灌注桩成孔施工的技术领域，包括：将护筒埋设，在护筒底部地基换填黏土夯实，且在护筒外壁回填黏土并分层夯实；在护筒的一侧架设冲击钻机，冲击钻机的冲击钻头伸入护筒内进行钻孔；在护筒的一侧设置正循环排渣系统，并将正循环排渣系统与冲击钻头连接；在冲击钻头钻出的孔内通过正循环的方式排渣，并使泥浆上返流出进入正循环排渣系统；在孔内吊放钢筋笼，并对孔内进行清孔换浆处理；对放置有钢筋笼的孔内进行混凝土浇筑成桩，并将护筒取出。本发明解决了现有技术中一些地质较差的岩层存在的在造孔过程中需要在造孔后通过捞渣筒捞渣，而无法在钻孔过程中继续进行直接排渣的技术问题。
Construction method of direct circulation cast-in-place pile of percussion drill
冲击钻正循环灌注桩的施工方法
WANG HUAN (author) / WANG MINGJIANG (author) / ZHANG ZHENBO (author) / HOU YUSHAN (author) / ZHANG JUN (author) / ZHANG CHAOYUAN (author) / ZHOU ZILIN (author) / MA XIAOJUN (author) / LI YOUYI (author) / LUO GUOFENG (author)
2023-03-03
Patent
Electronic Resource
Chinese
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