Bidirectional stirring pile machine

Abstract

The invention relates to a two-way stirring pile machine used in pile-forming through stirring at two opposite directions, which comprises a chassis, a tower, an inner drill pipe and an outer drill pipe coaxially sheathed together, and a drill bit. The outer drill pipe has a square-shaped or hexagon-shaped cross section; the rotation of the outer drill pipe is driven by a turntable on the chassis; the inner drill pipe is provided with a circular cross section; the rotation of the inner drill pipe is driven by an upper driving motor at the upper end of the drill pipe; the upper driving motor is connected with the inner drill pipe through a transmission shaft; a feeding device is arranged at the upper part of the transmission shaft, and a rotating sleeve for the outer drill pipe is arranged at the lower part of the transmission shaft; the rotating sleeve for the outer drill pipe is connected with the outer drill pipe through flanges. The two-way stirring pile machine can be used for both powder-spraying pile machine and slurry-spraying pile machine; the drilling speed is controlled by driving chains to realize pressuring and decompressing drilling; the piles are formed at one time, and a second repetitive stirring is not needed, thus doubling the construction efficiency with even stirring, steady construction, and high-quality of the formed pile; no ash back-feeding phenomenon occurs, and the cement consumption can be reduced by 10 to 20 percent, thus saving construction cost.

Description

technical field [0001] The invention relates to a device for soft soil foundation treatment, in particular to a two-way stirring pile machine. Background technique [0002] Soft soil foundations are often distributed along my country's coasts and river basins. Under the dynamic effects of loads, cycles, and vehicles, foundation settlement is the main form of foundation failure, which often leads to quality problems in highways, railways, airports, and docks. Among the various methods of dealing with soft soil foundation, the most widely used method is to choose composite foundation. The two-way mixing powder-jet pile selected in the soft soil treatment will greatly improve the strength of the composite foundation. What is commonly used in construction at present is the one-way mixing pile driver, and what adopt is a drill rod drives a drill bit to carry out one-way mixing construction, and its shortcoming is: mixing is uneven, and pile quality is poor, and work efficiency i...

AI Technical Summary

Problems solved by technology

At present, the pile driver with one-way mixing is commonly used in construction. It uses a drill rod to drive a drill bit for one-way mixing construction. The disadvantages are: uneven mixing, poor pile quality, and low work efficiency.

In the prior art, such as the Chinese patent whose patent number is 200410065861.4, it discloses a kind of bidirectional mixing pile driver with inner and outer double drill rods. Poor orientation, large swing during construction, resulting in uneven pile diameter, which not only affects the quality of construction piles, but also greatly wastes cement

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