Two-shaft, four-shaft and six-shaft interchanging type cement and soil stirring pile device and construction method thereof

Abstract

The invention relates to a two-shaft, four-shaft and six-shaft interchanging type cement and soil stirring pile device and a construction method thereof. The device comprises a host, a guide rod, a power assembly, a plurality of drill pipes, drill pipes with wings, multifunction drill bits, a background cement slurry stirring system, flow meters, a soil penetrating depth sensor and verticality real-time monitors, wherein the power assembly is connected with the drill pipes, the lower end of each drill pipe with the wing is connected with each multifunction drill bit, the top part of each drill pipe is provided with a slurry inlet, the middle part of each drill pipe is provided with a middle bearing bracket, each flow meter is arranged on a slurry spraying port, the penetrating depth sensor is arranged on a slide rail of the guide rod, each verticality real-time monitor is arranged on each middle bearing bracket, the flow meters, the soil penetrating depth sensor and the verticality real-time monitors are respectively connected with the host, and detachable drill pipes are adopted as the drill pipes. Compared with the prior art, the device has the advantages that the pile forming function is versatile, the cost is saved, the verticality is controllable, the pile forming effect is good, and the like.

Description

technical field [0001] The invention relates to a two-, four-, and six-axis interchangeable cement-soil mixing pile device and a construction method thereof, which are mainly used in the fields of foundation reinforcement, improvement, foundation pit enclosure and the like in municipal foundation, industrial and civil engineering construction. Background technique [0002] Stirring piles are made by mixing and stirring the curing agent with the soil, and improving the engineering mechanical properties of the pile through the hydrochemical reaction of the curing agent. Due to the obvious price advantage of the pile, the mixing pile is favored in the project. [0003] At present, two-axis mixing piles, SMW construction methods, and FCW construction methods are generally used for foundation pit enclosure waterstop and foundation reinforcement. These three construction methods generally only appear as mixing piles, and their functions are relatively single. Different pile types ...

AI Technical Summary

Problems solved by technology

[0003] At present, two-axis mixing piles, SMW construction methods, and FCW construction methods are generally used for foundation pit enclosure waterstop and foundation reinforcement. These three construction methods generally only appear as mixing piles, and their functions are relatively single. Different pile types need to be equipped with different devices.

The drill pipe at the lower part of the two-axis mixing pile has only two blades, and only two shafts can be drilled; the SMW construction method uses a special multi-axis mixer to drill and cut the soil on the spot, and at the same time, inject the cement slurry into the soil at the end of the multi-functional drill bit. After stirring and mixing, insert H-shaped steel or other profiles into the mixing pile body to form an underground continuous wall, which can only be drilled with three axes and requires a large amount of cement; the FCW construction method can only be drilled with five axes

In addition, the torque of the drill pipe of the SMW construction method and the FCW construction method cannot be self-balanced, and the power components need to bear excess torque, which limits and affects the drilling diameter, drilling depth and verticality.

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