A kind of reinforcement construction method of ultra-deep muddy soil layer triaxial stirring pile

Abstract

This application relates to a construction method for strengthening three-axis mixing piles in ultra-deep muddy soil layers, which includes the following steps: S1, removing underground obstacles, and leveling the site; S2, measuring and setting out lines, and determining pile positions; S3, excavating trenches , pile position review; S4, pile driver in place, leveling and straightening; S5, mud mixing; S6, mixing, spraying, sinking and lifting; S7, spoil treatment; S8, cleaning pipeline and mixing head; In the S6 step, at first analyze according to the previous geological exploration results, use the three-axis stirring pile machine to carry out spiral drilling, when the stirring head of the three-axis stirring pile machine enters the muddy stratum, increase the stirring of the three-axis stirring pile machine head speed. The application has the effect of improving the reinforcement quality, so that the construction quality of the three-axis stirring pile in the deep soft soil is better.

Description

technical field [0001] The present application relates to the field of foundation pit reinforcement, in particular to a reinforcement construction method for triaxial stirring piles in ultra-deep muddy soil layers. Background technique [0002] The three-axis mixing pile is a kind of long screw pile. The pile driver has three screw holes at the same time. During construction, the three screw holes are constructed downward at the same time. It is an effective form of soft foundation treatment. The soil is fully stirred to cause a series of physical and chemical reactions between the cement and the soil to harden the soft soil and improve the strength of the foundation. [0003] Although the soft foundation reinforcement method of triaxial mixing piles has better reinforcement effect when the depth of the foundation pit is shallow, and in the sand layer, the cement coagulation effect is better; however, when the reinforcement depth is gradually deepened, the reinforcement effe...

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Problems solved by technology

[0003] Although the three-axis mixing pile soft foundation reinforcement method has a better reinforcement effect when the depth of the foundation pit is shallow, and the cement setting effect is better in the sand layer; however, when the reinforcement depth gradually deepens, the reinforcement effect is difficult to control. , when in silty soil, the reinforcement of triaxial mixing pile is affected by the content of organic matter in it, and the pile-forming effect is worse than that of sand layer

[0004] In view of the related technologies mentioned above, the inventor believes that there is a defect that the construction quality of the three-axis mixing pile in the deep soft soil is relatively poor

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