Double-layer plastic sleeve bulk material and concrete stiffness core composite pile and construction method thereof

Abstract

The invention relates to a double-layer plastic sleeve bulk material and concrete stiffness core composite pile, which consists of a porous concrete cover plate at the pile top, a double-layer hollow plastic sleeve, a bulk material pile body, a reinforced concrete pile core, a precast reinforced concrete pile tip and a double-layer hollow plastic sleeve joint; the top of the double-layer hollow plastic sleeve is inserted into the porous concrete cover plate at the pile top, the bottom of the double-layer hollow plastic sleeve is connected with a sleeve plug of the precast pile tip, and two layers of adjacent plastic sleeve are connected by the sleeve joint; and an annular space formed by the double-layer hollow plastic sleeve is filled with the bulk material, and the reinforced concrete pile core is poured in a circular cavity of the inner layer of the plastic sleeve. The double-layer plastic sleeve bulk material and concrete stiffness core composite pile has the capabilities of integrating the advantages of a drainage consolidation method and a composite foundation method, greatly promoting the vertical bearing capability of a foundation by virtue of the reinforced concrete pile core, accelerating the consolidation of the soil body among piles through vertical drainage bodies at two sides of the concrete pile, isolating the pile body concrete from an external environment by using a sleeve, and enhancing the corrosion resistance of the pile body.

Description

technical field [0001] The invention relates to a double-layer plastic casing bulk material and concrete core combined pile which can simultaneously have the functions of accelerating the drainage and consolidation of the soil around the pile, enhancing the vertical deformation resistance of the foundation, and improving the durability of reinforced concrete, belonging to the foundation In the field of engineering, it can be used for soft foundation treatment of highway, municipal and other projects. Background technique [0002] my country has a vast territory, complex geological conditions and large differences between regions, and there are many types of soft foundations, which are widely distributed, especially in coastal areas and inland lacustrine sedimentary facies areas. There are many complex medium-thick soft soil foundations. How to effectively improve the bearing capacity of deep soft soil foundations and control soil deformation has always been one of the most i...

AI Technical Summary

Problems solved by technology

The construction time of the drainage consolidation method is long, the improvement of the overall strength of the foundation after the reinforcement is completed is limited, and the amount of deformation in the later period is large; the cost of the single composite foundation method is relatively high, and the pile construction will cause a large disturbance to the soil between the piles. And produce excess static pore water pressure, and the bearing capacity of the soil between the piles is difficult to fully utilize, etc.

The existing method of combined application of drainage consolidation and composite foundation can take into account the advantages of drainage consolidation method and composite foundation method to a certain extent, but there are many technical problems such as difficult construction organization and difficult control of later settlement deformation

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