Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pile hole squeezing and expanding drilling tool and pile forming method
The pile hole squeezing and expanding drilling tool comprises a drill rod, a drill bit, a connecting base, a cutting block and a pouring pipe, the two ends of the pouring pipe are closed, a slurry outlet communicated with the interior of the pouring pipe is formed in the lower end of the pouring pipe, and the drill rod and the drill bit are coaxially provided with mounting holes for mounting the pouring pipe. A slurry inlet communicated with the interior is formed in the upper end of the pouring pipe; the driving unit is used for driving the pouring pipe to move upwards, enabling the grout outlet hole to be communicated with the pouring opening and driving the two cutting blocks to move towards the outside of the drill bit at the same time. The cutting block penetrates out of the drill bit, so that when the drill bit completes drilling of the pile hole and is lifted upwards, the cutting block can cut threads on the hole wall of the pile hole, a concrete pile body formed after concrete pouring is provided with external threads, the contact area between the concrete pile body and the hole wall of the pile hole is increased, and the counter force of a soil body on the concrete pile body is increased; in addition, when a pile hole is drilled, the cutting block can retract into the drill bit, and resistance during drilling is reduced.
本发明公开了一种桩孔挤扩钻具，具体涉及施工机械技术领域，包括钻杆、钻头、连接座、切割块、浇筑管，浇筑管两端封闭，且其下端开设有连通其内部的出浆孔，钻杆和钻头同轴开设有供浇筑管安装的安装孔，浇筑管上端开设有连通其内部的进浆孔；用于驱动浇筑管朝上移动时，使出浆孔和浇筑口贯通，同时驱动两个切割块朝钻头外部移动的驱动单元。通过切割块穿出钻头，这样钻头在桩孔钻制完毕并朝上提升时，切割块能够将桩孔的孔壁切割出螺纹，使得混凝土浇筑后所形成的混凝土桩体具有外螺纹，增大了混凝土桩体与桩孔孔壁的接触面积，增大土体对混凝土桩体的反力，另外在钻桩孔时，切割块能够缩入钻头内，减少了钻孔时的阻力。
Pile hole squeezing and expanding drilling tool and pile forming method
The pile hole squeezing and expanding drilling tool comprises a drill rod, a drill bit, a connecting base, a cutting block and a pouring pipe, the two ends of the pouring pipe are closed, a slurry outlet communicated with the interior of the pouring pipe is formed in the lower end of the pouring pipe, and the drill rod and the drill bit are coaxially provided with mounting holes for mounting the pouring pipe. A slurry inlet communicated with the interior is formed in the upper end of the pouring pipe; the driving unit is used for driving the pouring pipe to move upwards, enabling the grout outlet hole to be communicated with the pouring opening and driving the two cutting blocks to move towards the outside of the drill bit at the same time. The cutting block penetrates out of the drill bit, so that when the drill bit completes drilling of the pile hole and is lifted upwards, the cutting block can cut threads on the hole wall of the pile hole, a concrete pile body formed after concrete pouring is provided with external threads, the contact area between the concrete pile body and the hole wall of the pile hole is increased, and the counter force of a soil body on the concrete pile body is increased; in addition, when a pile hole is drilled, the cutting block can retract into the drill bit, and resistance during drilling is reduced.
本发明公开了一种桩孔挤扩钻具，具体涉及施工机械技术领域，包括钻杆、钻头、连接座、切割块、浇筑管，浇筑管两端封闭，且其下端开设有连通其内部的出浆孔，钻杆和钻头同轴开设有供浇筑管安装的安装孔，浇筑管上端开设有连通其内部的进浆孔；用于驱动浇筑管朝上移动时，使出浆孔和浇筑口贯通，同时驱动两个切割块朝钻头外部移动的驱动单元。通过切割块穿出钻头，这样钻头在桩孔钻制完毕并朝上提升时，切割块能够将桩孔的孔壁切割出螺纹，使得混凝土浇筑后所形成的混凝土桩体具有外螺纹，增大了混凝土桩体与桩孔孔壁的接触面积，增大土体对混凝土桩体的反力，另外在钻桩孔时，切割块能够缩入钻头内，减少了钻孔时的阻力。
Pile hole squeezing and expanding drilling tool and pile forming method
桩孔挤扩钻具及成桩方法
XING XUANWEI (Autor:in) / XING ZHANDONG (Autor:in) / YUE XIA (Autor:in)
06.02.2024
Patent
Elektronische Ressource
Chinesisch
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