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Multidirectional variable-level differential in-situ mixing and stirring drill bit and construction method thereof
The invention discloses a multidirectional variable-level differential in-situ mixing and stirring drill bit and a construction method thereof, and belongs to the field of foundation treatment.The multidirectional variable-level differential in-situ mixing and stirring drill bit comprises an inner drill bit body and an outer drill bit body, and the rotating directions of the outer drill bit body and the inner drill bit body are opposite; the inner drill bit is provided with at least three or four layers of stirring blades, and the first layer of blades are of a linear structure; the second layer of blades is of a crescent structure, the convex surface of the crescent structure is a soil facing surface when the blades rotate clockwise, the third layer of blades is of a linear structure, the included angle between the projection of the blades on the drill rod and the horizontal plane is 165-175 degrees, the fourth layer of blades is of a crescent structure, and the concave surface of the crescent structure is a soil facing surface when the blades rotate clockwise. On the basis of original stirring, the shape and the arrangement form of the blades are changed, the radial stirring effect is improved, slurry is blocked in situ to be stirred and mixed at a high speed, and the mixing uniformity is achieved.
本发明公开了一种多向变级差速原位混合搅拌钻头及其施工方法，属于地基处理领域，包括内钻头和外钻头，外钻头和内钻头的旋转方向相反；所述内钻头设置有不少于三层或者四层搅拌叶片，第一层叶片为直线型结构；第二层叶片为月牙形结构，顺时针旋转时月牙形结构的凸面为迎土面，第三层叶片为直线型结构，叶片在钻杆上的投影与水平面之间的夹角为165°‑175°，第四层叶片为月牙形结构，顺时针旋转时月牙形结构的凹面为迎土面。本发明在原有搅拌的基础上，改变叶片的形状及布置形式，提高径向搅拌效果，且将浆液封堵在原位高速搅拌、混合，实现混合的均匀性。
Multidirectional variable-level differential in-situ mixing and stirring drill bit and construction method thereof
The invention discloses a multidirectional variable-level differential in-situ mixing and stirring drill bit and a construction method thereof, and belongs to the field of foundation treatment.The multidirectional variable-level differential in-situ mixing and stirring drill bit comprises an inner drill bit body and an outer drill bit body, and the rotating directions of the outer drill bit body and the inner drill bit body are opposite; the inner drill bit is provided with at least three or four layers of stirring blades, and the first layer of blades are of a linear structure; the second layer of blades is of a crescent structure, the convex surface of the crescent structure is a soil facing surface when the blades rotate clockwise, the third layer of blades is of a linear structure, the included angle between the projection of the blades on the drill rod and the horizontal plane is 165-175 degrees, the fourth layer of blades is of a crescent structure, and the concave surface of the crescent structure is a soil facing surface when the blades rotate clockwise. On the basis of original stirring, the shape and the arrangement form of the blades are changed, the radial stirring effect is improved, slurry is blocked in situ to be stirred and mixed at a high speed, and the mixing uniformity is achieved.
本发明公开了一种多向变级差速原位混合搅拌钻头及其施工方法，属于地基处理领域，包括内钻头和外钻头，外钻头和内钻头的旋转方向相反；所述内钻头设置有不少于三层或者四层搅拌叶片，第一层叶片为直线型结构；第二层叶片为月牙形结构，顺时针旋转时月牙形结构的凸面为迎土面，第三层叶片为直线型结构，叶片在钻杆上的投影与水平面之间的夹角为165°‑175°，第四层叶片为月牙形结构，顺时针旋转时月牙形结构的凹面为迎土面。本发明在原有搅拌的基础上，改变叶片的形状及布置形式，提高径向搅拌效果，且将浆液封堵在原位高速搅拌、混合，实现混合的均匀性。
Multidirectional variable-level differential in-situ mixing and stirring drill bit and construction method thereof
一种多向变级差速原位混合搅拌钻头及其施工方法
SONG WEIJIE (author) / ZHU QINGKAI (author) / LI JIANPING (author) / FENG ZHENTONG (author) / LIU GUANGLEI (author) / WU SIYU (author)
2024-10-01
Patent
Electronic Resource
Chinese
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