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Steel tube miniature pile and construction method thereof

A technology of micro piles and steel pipes, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of limited compaction of surrounding soil, grout running out of steel pipe micro piles, and uncontrollable grouting volume, etc., to achieve the goal of grouting The effect of controlling the amount, avoiding grouting and reducing the cost of grouting

Pending Publication Date: 2019-08-16
CENT SOUTH UNIV
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  • Abstract
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  • Claims
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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

Method used

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  • Steel tube miniature pile and construction method thereof
  • Steel tube miniature pile and construction method thereof
  • Steel tube miniature pile and construction method thereof

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Embodiment Construction

[0035] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

[0036] see Figure 1 to Figure 2 , the steel pipe micro-pile includes a steel pipe 1, an inner slurry layer 8 located inside the steel pipe and an outer slurry layer 9 located outside the steel pipe, and the steel pipe 1 includes an ordinary steel pipe section, an anchor section and an embedded end sequentially connected from top to bottom .

[0037] The outer slurry layer 9 includes a sealing section located outside the upper part of the steel pipe and a cement slurry section located below the sealing section. Specifically, the sealing section is a cement mortar layer 13 . The inner wall of the upper end of the ordinary steel pipe section is provided with a casing female wire 12 for sealing. The bushing mother wire can also be replaced by a rubber plug...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/38E02D5/48E02D15/04
CPCE02D5/38E02D5/48E02D15/04
Inventor 聂如松杜市委冷伍明叶新宇陈郗西李亚峰徐方杨奇董俊利魏广帅
Owner CENT SOUTH UNIV
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