Pile forming operation method for bi-directional stirring piles

Abstract

A pile forming operation method for bidirectional stirring piles is a ground foundation processing method and is adapted for soft ground foundation treatment. The operation method is that: a: leveling ground; b: the position of a bidirectional stirring pile machine: a hoisting machine suspends the stirring pile machine to a defined pile position and moves it to the center; c: stirring sinkage: starting the bidirectional stirring pile machine to make the drill rod cut soil from up to down along a guide frame, starting a slurry feeding pump to inject cement slurry to the ground, the vanes that rotate in normal and reverse directions on the drill rod of the bidirectional stirring pile machine are rotating together to stir the cement soil; d: the drill rod of the bidirectional stirring pile machine will continue moving down and stirring cement soil till to a designed depth; e: the vanes that rotate in normal and reverse directions on the drill rod of the bidirectional stirring pile machine will continue stirring the cement soil while stirring and hoisting ; f: hoisting and stirring to ground surface or designed elevation more than 50 cm to complete the construction of the bidirectional stirring cement soil stirring pile (1). The cement soil stirring piles (1) are disposed in the form of quincunx or square shape in order to ensure the pile quality and pile body 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 o...

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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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