Inverted-cup-shaped mixing pile, mixing pile drill bit and mixing pile construction method

• Main Authors: LIN YISHEN, HE CHANGMING, ZENG CHUHUI, LI JUN, QIAN CHAOQING, PENG GONGXUN, XIAO LITUO, XIONG YONG
• Format: Patent
• Language: Chinese; English
• Published: 15.11.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses an inverted-cup-shaped mixing pile, a mixing pile drill bit and a mixing pile construction method.The inverted-cup-shaped mixing pile is of a concentric cement mixing pile structure with the solid top and the hollow bottom, and the corresponding mixing pile drill bit comprises a drill bit body which is in a circular tube shape; the fixed blade is fixedly mounted on the outer side of the drill bit body; the movable blades are hinged to the inner side of the drill bit body through one-way hinges, the drill bit body rotates forwards to enable the movable blades to contract, and the drill bit body rotates reversely to enable the movable blades to extend; the grouting pipe is embedded in the drill bit body, and the end of the grouting pipe is exposed out of the end of the drill bit body. A tubular pile body can be constructed through the tubular drill bit body, and the internal movable blades can be controlled to contract or stretch by changing the rotating direction of the drill bit body,