Long screw pile driver with diameter expanding device and pile forming method

Abstract

The invention discloses a long spiral pile machine with an expanding device and a pile forming method. The long spiral pile machine is characterized in that a core barrel is arranged on the upper end part of a spiral drill rod, a second rotating mechanism is connected with the core barrel through a bearing assembly, the second rotating mechanism is provided with at least two independent working cavities, the spiral drill rod is provided with a left lug and a right lug which are symmetric to each other, each lug is hinged to one end of a lower hinge arm through a pin shaft, the lower hinge arm is hinged to an upper hinge arm through a hinge shaft, the upper end of the upper hinge arm is connected with a guide groove which is fixed on the spiral drill rod through a pin shaft, the upper hinge arm is connected with a telescopic arm, each hinge arm is provided with a drill tool, one side of the spiral drill rod is provided with a grouting pipe, the upper end of the grouting pipe is connected with a slurry source, the lower end of the grouting pipe pushes against a slurry stop plug, a bottom valve plate is locked onto an output port of a spiral drill bit, one side of the bottom valve plate is respectively hinged to a supporting plate and a connecting plate through a pin shaft, the supporting plate is connected with a spiral drill bit concrete pipe, the other end of the connecting plate is hinged to the wall of the grouting pipe, and the spiral drill rod is provided with a grouting pipe lifting device. The long spiral pile machine is simple to operate, high in working efficiency and capable of improving the stability and earthquake resistance of a pile foundation.

Description

technical field [0001] The invention relates to pile foundation construction equipment for buildings, in particular to a long screw pile machine and a pile forming method suitable for local expansion of long screw pile foundation construction. Background technique [0002] As we all know, the long screw pile driver is a common equipment for pile foundation construction, which includes two parts: hydraulic walking type, crawler type pile frame and drilling system. Structure, control room, hydraulic system and electrical system. The drilling system includes a power head and a drilling tool. The output shaft of the power head-the auger rod and the auger bit are hollow. The lower part of the power head is equipped with a rotary mechanism to inject concrete into the pile hole. , double-headed single-screw, double-headed double-screw, the drilling tool is a tool inlaid at the bottom of the power head, which has the advantages of simple operation, convenient use, and high drilling...

AI Technical Summary

Problems solved by technology

[0002] As we all know, the long screw pile driver is a common equipment for pile foundation construction, which includes two parts: hydraulic walking type, crawler type pile frame and drilling system. Structure, control room, hydraulic system and electrical system. The drilling system includes a power head and a drilling tool. The output shaft of the power head-the auger rod and the auger bit are hollow. The lower part of the power head is equipped with a rotary mechanism to inject concrete into the pile hole. , double-headed single-screw, double-headed double-screw, the drilling tool is a tool inlaid at the bottom of the power head, which has the advantages of simple operation, convenient use, and high drilling efficiency, but this long screw pile driver can only drive up and down equal diameter piles. For pile foundations, in specific areas and specific areas, in order to increase the bearing capacity and earthquake resistance of pile foundations, the pile foundations need to have different diameters, especially the bottom diameter of pile foundations needs to be increased. The existing long screw pile machine is unattainable

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