Combined pile drill rod, drilling tool and combined pile manufacturing method

Abstract

The invention relates to a combined pile drill rod, a drilling tool and a combined pile manufacturing method, and belongs to the technical field of pile forming equipment. The drill rod comprises a rod body, a drill bit is connected to the end of the rod body, a liquid outlet is formed in the drill bit, a plurality of rotating cutter sets are arranged in the length direction of the rod body at intervals, rotating cutters in each rotating cutter set are circumferentially distributed on the rod body, the rotating cutters are connected to the rod body through a supporting seat and can rotate on the supporting seat, a first blocking piece and a second blocking piece are arranged on the supporting seat, and the rotating cutters can make contact with the first blocking piece to form an expansion state after rotating in the forward direction, and the rotating radius of the rotating cutters in the expansion state is D1; and the rotating cutters can be in contact with the second blocking piece to form a contraction state after rotating in the reverse direction, the rotating radius of the rotating cutters in the contraction state is D2, and D1 is larger than D2.

Description

technical field [0001] The invention belongs to the technical field of pile-forming equipment, and in particular relates to a composite pile drill pipe, a drilling tool and a method for manufacturing a composite pile. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The cement-soil core-inserted composite pile is a pile formed by compounding the cement-soil pile formed by the high jet mixing method and the concentrically implanted core pile, and has been widely used at present. The cement-soil cored pile has the advantages of less mud pollution, reliable pile quality, and low cost. The pile-forming process and construction technology of the two pile types of the combined pile are different, which causes the concentricity control problem when the two pile types are combined, and because the two pile types need to be combined, an additional construct...

AI Technical Summary

Problems solved by technology

The cement-soil cored pile has the advantages of less mud pollution, reliable pile quality, and low cost. The pile-forming process and construction technology of the two pile types of the combined pile are different, which causes the concentricity control problem when the two pile types are combined, and because the two pile types need to be combined, an additional construction process is added, which is also a certain problem. To a certain extent, it affects the construction efficiency and slows down the construction speed.

Images