A Confined Tube Grouting Pile Suitable for Underground Chloride Erosion Environment

Abstract

The invention discloses a constrained pipe cast-in-situ pile suitable for underground chloride-salt erosion environment and a preparation method thereof. The constrained pipe adopts fiber-reinforced polymer modified cement-based composite material and is prefabricated according to a centrifugal process. During on-site construction, holes are artificially formed, placed in restraint pipes, and then steel cages are placed in the pipes according to the design requirements and concrete is poured, and it is prepared after curing and hardening. The invention utilizes the restraint pipe with high resistance to chloride ion penetration to isolate the concrete poured inside from the external erosive environment, ensuring the integrity of the internal reinforced concrete structure and various mechanical performance parameters, thereby meeting the requirements of the underground chlorine salt erosive environment. Requirements for the durability of the pile structure. The pile body of the invention has high forming quality, reasonable structure combination, fully exerted mechanical properties of materials, and high pile body bearing capacity.

Description

technical field [0001] The invention relates to a constrained pipe cast-in-place pile, in particular to a restrained pipe cast-in-place pile suitable for underground chlorine-salt erosion environment. Background technique: [0002] As an important form of foundation, the pile foundation can pass through the entire weak foundation soil layer to the soil layer with good geology, overcome the negative impact brought by the bad soil layer, and provide a higher bearing capacity for the upper structure. Therefore, it is widely used in the foundations of various modern buildings and structures. [0003] China has a vast territory, complex and diverse natural environments, and complex and diverse service environments for pile foundations. Marine and offshore chloride ion erosion environments and inland salt lakes and saline-alkali land sulfate corrosion environments are very common. Concrete structures suffer from different erosion damage degrees and mechanisms in different erosion...

AI Technical Summary

Problems solved by technology

Under these environmental conditions, the corrosion of aggressive ions will cause non-negligible damage to the pile body, seriously affect the quality of the pile body, endanger the bearing capacity and various performances of the pile body, and as time goes on, the damage phenomenon will continue. Aggravated, bringing serious safety hazards and seriously threatening the safety of the superstructure

[0004] Due to the limitations of the existing cast-in-situ pile construction technology, its forming quality is closely related to the surrounding environmental factors, especially when it is in a chloride-salt erosion environment, there will inevitably be chloride ions in the pile body during pouring, maintenance and pile use. Intrusion, endangering the safety of the pile body, and there are serious safety hazards

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