Segmented bit of long spiral drilling machine

Abstract

The invention discloses a segmented bit of a long spiral drilling machine. The segmented bit of the long spiral drilling machine comprises a lip-shaped locating ring arranged at the top end of the bit and having axial direction locating action and connected to the hollow flow passage of the long spiral drilling machine, a long spiral drilling rod is connected via the fixing ears and fixing screws at two sides of the locating ring, the bit is divided into the upper cutting section drilled core and lower guiding section drilled core, the drilled core is provided with the helical blade, the front end of the helical blade is provided with the cutting edge, the cutting section helical blade and the helical blade of the long spiral drilling rod are the same on diameter, the diameter of the guiding section blade is not changed and smaller, the big and small helical blade helical grooves are connected, the bottom end of the bit main body is provided with a bit sharp end and the sharp end comprises the main cutting cutter. The segmented bit of the long spiral drilling machine is suitable for the lock-joint pile waterproof curtain construction and construction of other long spiral pile with beforehand guiding hole after forming the guiding hole beforehand, the problem of the pile perpendicularity and large pile deviation in the long spiral construction can be effectively solved and the pile-forming quality of the lock-joint pile is improved.

Description

technical field [0001] The invention relates to a novel segmented drill bit of a long auger drilling machine, which is mainly used for the construction of long auger piles and their occlusal pile walls in the field of civil engineering. Background technique [0002] Compared with the underground diaphragm wall technology, the interlocking pile wall waterproof curtain has the characteristics of better economy and better stratum adaptability in foundation pit engineering. It is widely used in engineering, but there are pile position deviation, pile verticality and occlusal ability. limits. The construction of occlusal piles has high requirements for pile-forming machinery. Usually, the secondary piles use large-scale pile foundation construction equipment such as full-rotary drilling rigs and rotary excavation pile foundations with outer sleeves. The high requirements for construction equipment also limit the Application of occlusal pile walls. Compared with the construction...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of verticality of pile body and pile position control, the present invention provides a segmented drill bit of long auger drilling rig which effectively improves the verticality of long helical mixing pile pile body and solves the problem of pile position deviation after the pilot hole

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