Original-state soil borrowing press-grouting concrete pile exerted by prestress and construction method thereof

Abstract

The invention provides an original-state soil borrowing press-grouting concrete pile exerted by prestress. A steel reinforcement cage is internally arranged, so that the requirement for construction of reinforced concrete is met, prepressing ribs are arranged in the steel reinforcement cage, and prestress is exerted. Due to the fact that the original-state soil borrowing pile forming technology is adopted in a pile body, no slurry is discharged, the pile body is compact, and cracks can not be generated after prestress is exerted on the concrete pile body; the steel use amount is saved and the building cost of projects is reduced.

Description

technical field [0001] The invention relates to the technical field of foundation engineering, in particular to a prestressed soil-extracted pressure grouting concrete pile and a construction method thereof. Background technique [0002] Conventional anti-floating piles use bored cast-in-place piles. The displaced soil is crushed and mixed with water to form a slurry about 3 times the volume, which is discharged through forward and reverse circulation, resulting in a large amount of slurry discharge; the pile formation speed is slow, and the construction efficiency is extremely low. Water and electricity consumption is serious, and there are often serious quality defects such as excessively thick sediment, broken piles, and mud inclusions, and mud skins lead to low friction resistance of piles. [0003] Due to the conventional anti-floating piles, the tension often causes the pile body to crack, resulting in a reduction in the durability of the tensile reinforcement. In ord...

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Problems solved by technology

[0002] Conventional anti-floating piles use bored cast-in-place piles. The displaced soil is crushed and mixed with water to form a slurry about 3 times the volume, which is discharged through forward and reverse circulation, resulting in a large amount of slurry discharge; the pile formation speed is slow, and the construction efficiency is extremely low. Water and electricity consumption is serious, and there are often serious quality defects such as excessively thick sediment, broken piles, and mud inclusions, and mud skins lead to low friction resistance of piles

[0003] Due to the conventional anti-floating piles, the pile body is often cracked under the action of tension, resulting in a decrease in the durability of the tensile reinforcement

In order to control the cracks of the pile body, it is necessary to increase the reinforcement body in large quantities, resulting in waste of raw materials

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