Five-axis cement-soil mixing pile device and construction method

Abstract

The invention relates to a five-axis cement-soil mixing pile device and a construction method. The device comprises a walking-type and crawler-type host machine, a winding machine, a guide rod, a steel wire rope, a slurry inlet, a power head, a speed change box, a speed reducer, drill stems, a middle support frame, a lower support frame, drill stems with wings, hoops, a multifunctional drill head, a slurry spraying opening and a background cement slurry mixing system, wherein the winding machine and the guide rod are fixed on the host machine; the power head is connected with a pulley on the top of the guide rod through the steel wire rope; the steel wire rope drives the power head to rise and fall in a vertical direction; the power head is connected with five drill stems sequentially through the speed change box and the speed reducer; the middle support frame is arranged on the middle parts of the five drill stems, and the lower support frame is arranged on the lower parts of the five drill stems; the drill stems with wings are connected to the lower ends of the drill stems; the hoops are arranged on the drill stems with the wings; the lower ends of the drill stems with the wings are connected with the multifunctional drill head; and the slurry spraying opening is formed in the multifunctional drill head. Compared with the prior art, the five-axis cement-soil mixing pile device has the advantages of guaranteeing the safety and the quality, reducing the cost, shortening the work period and the like along with no noise, no vibration and high efficiency.

Description

technical field [0001] The invention relates to a five-axis cement-soil mixing pile device and a construction method, which are mainly used in foundation pit enclosure, water stop and foundation reinforcement in civil and industrial infrastructure construction. Background technique [0002] At present, two-axis mixing piles and SMW construction methods are mostly used for foundation pit enclosure and foundation reinforcement. [0003] The two-axis mixing pile is a construction method extended in the 1980s. The frame is a well-shaped frame, which walks in a tube, has extremely poor stability, low work efficiency, and high labor intensity. In addition, the power head part uses a 37kw conventional motor, and the starting power is insufficient. . The deepest pile is only 18m long, and the lower drill pipe has only two blades, so the mixing is not uniform, and the quality of the piles made by three stirring and two spraying is still difficult to guarantee. Each pile is 1.2 meter...

AI Technical Summary

Problems solved by technology

[0003] The two-axis mixing pile is a construction method extended in the 1980s. The frame is a well-shaped frame, which walks in a tube, has extremely poor stability, low work efficiency, and high labor intensity. In addition, the power head part uses a 37kw conventional motor, and the starting power is insufficient.

The deepest pile is only 18m long, and the lower drill pipe has only two blades, so the mixing is not uniform, and the quality of the piles made by three stirring and two spraying is still difficult to guarantee. Each pile is 1.2 meters in one group, resulting in many overlapping cold joints of piles, which is easy to cause water leakage, etc. Phenomenon

[0004] The disadvantage of the SMW construction method is that the cement seepage is 20%, and the water-cement ratio is 1.5-2.0 to form a pile. Due to the increase of the water-cement ratio, in order to ensure the strength of the cement, the amount of cement can only be increased

The amount of cement is large, and one-third of the soil is replaced. The soil contains cement slurry, which cannot be used as farming soil and greening soil. It can only be treated as dregs, which not only wastes materials, but also pollutes the environment, and the cost is high.

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