Bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and construction method

Abstract

The invention relates to a bi-layer plastic-bushing inverted-arch cambered hollow special-shaped pile and a construction method. The pile is characterized by structurally comprising the inverted-arch cambered hollow special-shaped pile, a pile toe arranged at the bottom end of the special-shaped pile and fixed through fixing parts, and a precast reinforced concrete pile tip; a cemented soil layer is arranged on the outer side of a pile body; a cross section of the special-shaped pile is Y-shaped or X-shaped, and bushings with threads are arranged in a round hole in the center of the pile body and on the outer side of the pile body; a reinforcement cage, which is in the same shape as the pile body but slightly smaller than the pile body, is arranged in the pile body; horizontal and longitudinal tensile reinforcements are arranged in the reinforcement cage; and the fixing parts corresponding to the bushings and an immersed tube are arranged on the top face of the precast reinforced concrete pile tip. During construction, the pile toe and the inner bushing are fixed firstly, then the reinforcement cage and the outer bushing are sleeved, and concrete is poured between the inner bushing and the outer bushing as well as between the outer bushing and the immersed tube to respectively form a concrete pile core and a pile-side cemented soil layer. Area of the cross section of the pile body is small, consumption of building materials is reduced, bearing capacity is high, and the pile body is high in capability of resisting to environmental erosion.

Description

technical field [0001] The present invention relates to a new type of pile body structure and construction method, in particular to a pile body with Y-shaped or X-shaped cross section, threaded plastic sleeves on the center and outside of the pile body, and special-shaped steel reinforcement cages in the pile body. The invention discloses a hollow special-shaped pile with a reverse arched surface of a plastic sleeve, which belongs to the field of foundation engineering and is suitable for foundation treatment in projects such as building construction, highways, municipal administration, airports, and dams. Background technique [0002] With the development of my country's modernization construction, the scale of capital construction and the load of buildings are getting bigger and bigger, and the requirements for foundation are getting higher and higher. The purpose of foundation treatment is to increase the strength and stability of the foundation and reduce the deformation...

AI Technical Summary

Problems solved by technology

[0006] To sum up, although the existing foundation treatment methods have achieved good reinforcement effects and economic benefits under suitable engineering conditions, some pile types are ineffective in resisting external environmental erosion, resisting lateral deformation, improving material utilization, and improving the pile body. There are still some deficiencies in mechanical performance and other aspects

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