Pile forming operation method for bi-directional stirring piles

Abstract

The piling operation method of two-way mixing pile is a foundation treatment method, which is suitable for soft soil foundation treatment. The operation method is: a: leveling the site; Centering; c: Stirring and sinking: start the two-way stirring pile driver, make the drill pipe of the two-way stirring pile driver cut the soil downward along the guide frame, turn on the slurry pump, spray cement slurry to the soil, and the drill pipe of the two-way stirring pile driver is respectively positive , The counter-rotating blades rotate at the same time to stir the cement and soil; d: The drill pipe of the two-way stirring pile machine continues to sink and stir the cement and soil until the design depth; e: While stirring and lifting, the drill pipe of the two-way stirring pile machine rotates forward and reverse f: lift and stir to the ground surface or 50cm above the design elevation, and complete the construction of the two-way mixing cement-soil mixing pile (1). The cement-soil mixing pile (1) is arranged in a plum blossom shape or square to ensure quality and pile quality.

Description

technical field [0001] The invention relates to a ground treatment method, which is suitable for soft ground treatment and belongs to the technical field of civil engineering. Background technique [0002] The cement-soil mixing pile was first successfully developed in Sweden. In 1977, the General Building Research Institute of the Ministry of Metallurgy and the Water Transport Planning and Design Institute of the Ministry of Communications carried out indoor experiments and mechanical development in China. In 1980, it succeeded for the first time in the soft soil foundation reinforcement project. Since then, it has been popularized in soft soil foundation reinforcement projects across the country, especially in soft soil foundation treatment in road engineering. [0003] Soft soil foundation treatment in road engineering is a key link to ensure the quality of the project, and it occupies a large proportion of the total project price. A large number...

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Problems solved by technology

[0005] (1) Cement-soil mixing piles generally have uneven cement-soil mixing in soft soil foundation treatment, which affects the quality of piles

[0006] (2) Cement-soil mixing piles generally have uneven distribution of cement slurry in the pile body in the treatment of soft soil foundations, especially when the amount of cement slurry mixed below 6m to 7m does not meet the due requirements

[0007] (3) During the construction of cement-soil mixing piles, there is a common phenomenon of serious slurry leakage, and a large amount of cement slurry emerges from the ground, which affects the amount of cement slurry in the pile body.

[0008] (4) The traditional cement-soil mixing pile construction method generally requires four stirrings and two sprays, which is low in work efficiency

[0009] Due to the existence of the above problems, the quality of the cement-soil mixing pile is affected; at the same time, the application range of the cement-soil mixing pile is restricted

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