Green concrete prefabricated pile for strengthening soft foundation and construction method

Abstract

The invention belongs to the technical field of soft soil foundation reinforcement construction, and in particular relates to a green concrete prefabricated pile for strengthening a soft foundation and a construction method. According to the green concrete prefabricated pile, a base material is internally provided with a tensile reinforcing material; and the base material is prepared from coal ash, quick lime, blast furnace slag micro powder, sulfate aluminum cement and the like. The green concrete prefabricated pile is manufactured by taking full advantages of conventional equipment and materials, the material structure and the construction procedures are changed, and the green concrete prefabricated pile has the advantages of good piling quality, high pile foundation bearing force and low manufacturing cost; and as the green concrete prefabricated pile is prepared from industrial waste slag such as coal ash and steel slag as mineral admixtures, and clay aggregate or construction waste recycled aggregate, industrial waste slag and construction wastes are effectively utilized, the environment pollution is reduced, and the foundation treatment cost can be lowered.

Description

technical field [0001] The invention belongs to the technical field of soft ground reinforcement construction, in particular to a green concrete prefabricated pile and a construction method for strengthening soft ground. Background technique [0002] The annual discharge of fly ash in thermal power generation and other enterprises is huge. In order to turn fly ash into treasure, in recent years, the production of cement with fly ash as raw material has generally appeared in many places, which is an important aspect of comprehensive utilization of fly ash. way. However, the existing fly ash-replaced cement has the problems of low strength, poor impermeability, freeze-thaw resistance and corrosion resistance. At the same time, the replacement of cement by existing fly ash generally does not exceed 30%, and the proportion of cement is still relatively large, so the reduction in production cost is not obvious. [0003] With the continuous acceleration of the urbanization proce...

AI Technical Summary

Problems solved by technology

However, the existing fly ash-replaced cement has the problems of low strength, poor impermeability, freeze-thaw resistance and corrosion resistance.

For example, lime piles are formed by dry mixing quicklime and slag or fly ash, but the strength of the pile itself is low, and the bearing capacity provided is limited, and the method of pile formation is to use artificial Luoyang shovel to form holes, and the technology is relatively backward

The common process of cement-soil piles is deep mixing, which drills into the soil through the drill pipe of the drilling rig, sprays the cement (slurry or powder) and mixes it with the soil to form a pile. , the strength of the pile body is greatly affected by the soil environment, for example, the strength of the pile body is very low when the content of organic matter in the soil is high

The construction process of cement fly ash gravel pile (CFG) is complicated, and concrete is poured on site, which often leads to broken piles, neck shrinkage, and strength lower than the design value

The strength of the above pile types is due to factors such as construction and concrete materials, so that the strength of the pile itself cannot meet the design requirements

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