A stirring device and a stirring method for stirring sea mud

Abstract

The invention mainly discloses a stirring device and method for stirring sea mud. According to the technical scheme, the stirring device comprises a chassis, a first motor, a second motor, a stirring machine head and a conveying device; the stirring machine head comprises an outer drill pipe, an inner drill pipe, first stirring blades and second stirring blades; the inner drill pipe is provided with a drill bit and third stirring blades; the drill bit is located at the bottom end of the inner drill pipe, and the third stirring blades are located between the first stirring blades and the second stirring blades; the inner drill pipe is provided with a first conveying channel and two first discharging sections; and the third stirring blades are provided with a second conveying channel and a second discharging section. The method comprises the steps of primary stone crushing, grout spraying, stirring and sinking, in-situ stirring, detecting, grout spraying, stirring and ascending, secondary detecting and stirring machine head cleaning. According to the stirring device and method, the multiple stirring blades are adopted, stirring is uniform, and the stirring efficiency and the stirring mixing effect are improved; and the multiple discharging sections are arranged, the one-time grout spraying amount is large, the pile forming speed is high, the pile forming quality is good, and the construction cost is saved.

Description

technical field [0001] The invention relates to a stirring device and a stirring method for stirring sea mud. Background technique [0002] Soft soil foundations are often distributed in coastal areas and river basins in my country. Under the action of load, circulation, and vehicles, foundation settlement is the main form of foundation failure, which often leads to quality problems in highways, railways, airports, and docks. Forming cement piles to greatly increase the strength of the foundation is the main method to solve the foundation settlement. The method is to mix the sea mud and the cement curing agent under the operation platform of the foundation crushed stone cushion in situ, and a physical and chemical polymerization reaction occurs between the cement curing agent and the sea mud to make the sea mud condense into a certain strength. The cement-soil mixing pile, the cement mixing pile and the sea mud around the cement mixing pile form a composite foundation, so as...

AI Technical Summary

Problems solved by technology

However, due to the various causes of soft soil, it is difficult to meet the quality requirements of the project after being processed by conventional mixing pile machines.

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. Its disadvantages are: uneven mixing, low pile strength, difficult quality assurance, and high construction costs. , the effective pile depth is limited, the pile forming speed is slow, etc.

The two-way stirring pile driver in the prior art needs to be stirred back and forth during the construction process. The stability of the pile is poor, and a large amount of mud is consumed. The construction time is long. Only one faucet is used to spray the grout, and the spraying efficiency is poor. long time

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