A new type of marine engineering pile foundation that reduces the displacement of the pile body and its manufacturing method

Abstract

The invention discloses a novel ocean engineering pile foundation capable of reducing pile body deflection and a manufacturing method thereof. The pile foundation comprises an upper steel pipe pile, a middle reinforced concrete pile and a lower expanding concrete pile which are sequentially connected from top to bottom, wherein an upper grouting guide pipe and a lower grouting guide pipe are arranged in the upper steel pipe pile; an upper grouting hole is formed in the position near a pile body mud surface; a lower grouting hole and a grouting side plate are arranged at the lower part near the mud surface outside the pile body; an upper grouting bottom plate and a lower grouting bottom plate are respectively welded on and below the grouting side plate; a reinforcement cage is arranged from the position near the mud surface inside the pile body to the upper part of the lower expanding concrete pile; an annular piled weight is arranged on a pile periphery mud surface; a main body of the piled weight adopts an annular reinforced concrete structure; and isolation steel plates are arranged in the main body of the piled weight, and gravel is filled in the main body of the piled weight. Based on the idea of a composite pile and by combining with grouting and expanding processes, the invention provides the novel ocean engineering pile foundation for improving the vertical and lateral bearing force of the pile foundation to reduce pile body deflection and a method for manufacturing the pile foundation. The pile foundation also has favorable economic applicability.

Description

technical field [0001] The invention relates to the technical field of marine engineering pile foundations, in particular to a novel marine engineering pile foundation capable of reducing pile body displacement and a manufacturing method thereof. Background technique [0002] In the design of pile foundations in marine engineering, steel pipe piles are widely used because of their high rigidity, which can provide better vertical and lateral bearing capacity, and have the characteristics of convenient construction. For steel pipe piles in a complex marine environment, when the environmental load is severe, the displacement of the pile body exceeding the allowable value and the local strength failure of the pile body may occur. For example: in the face of long-term wind and wave loads, the pile foundation bears the horizontal cyclic load from the upper structure, and the long-term cyclic action may cause permanent lateral deformation of the pile foundation. For example, when t...

AI Technical Summary

Problems solved by technology

For steel pipe piles in a complex marine environment, when the environmental load is severe, the displacement of the pile body exceeding the allowable value and the local strength failure of the pile body may occur

For example: in the face of long-term wind and wave loads, the pile foundation bears the horizontal cyclic load from the upper structure, and the long-term cyclic action may cause permanent lateral deformation of the pile foundation. For example, when the pile body rotation angle exceeds 0.5°, it may cause the upper The facilities cannot operate normally; in addition, when steel pipe piles are subjected to severe wave loads, the pile body bending moment caused by extreme wave force will reach its peak value near the mud surface under the seabed, and excessive pile body bending moments often cause steel pipe piles to fracture of pile

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