Steel tube miniature pile and construction method thereof

Abstract

The invention provides a steel tube miniature pile. The steel tube miniature pile comprises a steel tube, an inner slurry layer located inside the steel tube and an outer slurry layer located outsidethe steel tube, and the steel tube comprises an ordinary steel tube segment, an anchoring segment and a fixed end which are connected successively from top to bottom; the anchoring segment is providedwith a grouting hole and a clamping throat for assembling a rubber film, the rubber film sleeves the outer wall of the grouting hole and is used for sealing the grouting hole, and the rubber film isfilled with cement slurry to form an convex structure; and the fixed end is arranged at the lowermost end of the steel tube and used for embedding into a stratum. The invention further provides a specific construction method of the steel tube miniature pile. According to the construction method of the steel tube miniature pile, the situation that grouting slurry in the steel tube does not flow outcan be guaranteed, the problem of slurry runout at the bottom of the pile is solved, the grouting amount is controllable, and the grouting cost is lowered; and meanwhile, friction resistance of the side wall of a pile body can be increased, and the overall compression resistant, anti-pull and axial load resistant capacity of the steel tube miniature pile is improved.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a steel pipe micro pile and a construction method thereof. Background technique [0002] Steel pipe micro-pile is a cast-in-situ pile formed by drilling, inserting steel pipes, and grouting with a diameter of less than 300mm and a slenderness ratio usually greater than 30. Steel pipe micro piles have the following advantages in soft soil foundation reinforcement engineering and slope anti-slide protection engineering: convenient and fast construction, and very safe, small equipment used in construction, can be applied in all kinds of rock mass, especially when large machinery cannot When entering the site, the role of steel pipe micro piles is more obvious; the hole diameter of the pile is small, so the additional stress on the existing building foundation and foundation soil is small, and will not affect the safety of the existing structure. Low noise during operation...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a steel pipe micro-pile to solve the problem that in the prior art, due to the low strength of the soft soil foundation, the steel pipe micro-pile is prone to grouting, which leads to uncontrollable grouting volume, and the existing steel pipe micro-pile has a negative impact on the surrounding area. Technical problems with limited compaction of soil

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