Drilling tool, pile forming device and pile forming construction method for displacement pile

Abstract

The invention provides a drilling tool, a pile forming device and a pile forming construction method for a displacement pile and relates to the technical field of building construction. The drilling tool comprises a cylindrical drill pipe, wherein along the length direction of the drill pipe, a forward spiral blade and a backward spiral blade are disposed on two sections of the drill pipe; and theforward spiral blade and the backward spiral blade surround the outer circumferences of the drill pipe and extend along the length direction of the drill pipe. The pile forming device comprises a concrete conveying mechanism, a first driving mechanism, a second driving mechanism and the drilling tool, wherein the concrete conveying mechanism communicates with the drill pipe by a pipeline; and thefirst driving mechanism and the second driving mechanism are connected to the drill pipe. The pile forming construction method for the displacement pile applies the drilling tool or the pile formingdevice. The drilling tool, the pile forming device and the pile forming construction method provided by the invention relieve the technical problem in the prior art that a turning direction of a spiral blade disposed on a pipe body of a drill pipe in a drilling tool used for construction of a displacement pile can only facilitate drilling of the drill pipe into the ground, and the turning direction of the spiral blade cannot facilitate upward rotation and pulling of the drill pipe during upward lifting of the drill pipe.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a drilling tool, a pile-forming device and a pile-forming method for squeezing soil piles. Background technique [0002] Compared with soil borrowing piles (soil borrowing piles such as rotary excavation piles, bored piles, punching piles, etc.), squeezed soil piles have good advantages in controlling settlement and improving bearing capacity. Due to the advantages of short construction period, no soil extraction, and wide application range, soil-squeezing piles are more and more widely used in the field of construction. [0003] The piling process of the soil-squeezed pile requires the use of a special drilling tool, which includes a drill bit and a hollow drill rod, and the drill bit includes an opening structure and a hollow core pipe. The side wall of the drill pipe and the side wall of the core pipe are provided with helical blades. The core pipe is installed ...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of drilling tool, pile-forming device and pile-forming method of extruding soil pile, to relieve the drilling rod in the drilling tool that is used for constructing extruding soil pile in the prior art, set on its shaft There are helical blades extending along the length of the shaft, but the direction of rotation of the helical blades is only convenient for the drill pipe to drill into the ground. When the drill pipe is lifted, the direction of rotation of the helical blades is not convenient for the technology of pulling out the drill pipe by turning up question

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