High polymer material slurry filled discrete material pile composite foundation and construction method thereof

Abstract

The invention discloses a high polymer material slurry filled discrete material pile composite foundation and a construction method thereof. A discrete material pile is filled in a soft soil foundation through a vibrating immersed pipe, a rigid injection pipe is embedded in advance in the middle of the discrete material pile, a barrel-shaped cover plate is embedded on the top of the discrete material pile, and high polymer material slurry is sprayed to the discrete material pile at high pressure through a slurry injection system. The high polymer material slurry is filled in the clearance of the discrete material pile and splits to permeate into pile soil, so that the discrete material pile body is engaged and contacted with the soil around the discrete material pile, and the friction coefficient of the pile-soil contact surface is effectively increased. Bar pile caps are poured on the top which is formed by a high polymer material slurry filled discrete material pile body, a high polymer material slurry filled soil body and the pile soil. A high polymer material is insoluble and has certain expansibility. In the process of spraying at high pressure, water in a part of the soil body is discharged through a passage of the discrete material pile. The high polymer material slurry filled discrete material pile composite foundation has the advantages of simple construction process, strong operability, convenience in quality control, good engagement effect of the pile-soil contact surface, obvious economic benefit and significant effect for reinforcing the soft soil foundation.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation treatment, in particular to a high polymer material slurry solid-dispersion material pile composite foundation and a construction method thereof. It is mainly applicable to engineering technology fields such as coastal, riverside expressways, high-speed railways and other soft soil foundation treatment. [0002] Background technique [0003] The pile side mud skin of the bored pile affects the pile side friction, and the pile tip sediment problem affects the pile tip resistance; post-grouting technology can improve these two problems to a certain extent. Prior to the present invention, the Chinese invention patent "post-grouting technology of cast-in-place pile" (ZL 00100760.2), the Chinese invention patent "post-grouting construction technology of bored pile side and pile bottom" (ZL 200310102269.2) and the Chinese invention patent "Post-grouting construction technology of bored pi...

AI Technical Summary

Problems solved by technology

This method improves the overall rigidity of piles made of bulk materials, and overcomes the defects of obvious lateral bulging of piles made of bulk materials and short critical pile length. Similar to cast-in-situ piles, the penetration of cement grout in the soil under conventional pressure grouting is not significant, especially in the cohesive soil layer with a relatively low permeability coefficient

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