Diameter-variable pile cap structure of foundation pile for offshore building

Abstract

The invention discloses a variable-diameter pile cap structure of a foundation pile for an offshore building, which comprises a pile cap cylinder body, wherein an inner support mechanism for supporting the inner side surface of a pile body is arranged in the pile cap cylinder body; an annular base is arranged at the lower part of the pile cap cylinder body; at least three diameter-variable mechanisms for supporting the outer side surface of the pile body are uniformly distributed on the base in the circumferential direction; an avoidance through hole is arranged in the side wall of the pile cap cylinder body, corresponding to the diameter-variable mechanism; the diameter-variable mechanism comprises a hydraulic cylinder arranged on the base and an outer support positioning block arranged on the outer side surface of a push-against pile body arranged at the end part of a piston rod of the hydraulic cylinder; the inner support mechanism comprises a bearing carrier connected with the pilecap cylinder body, an inner support baffle matching the surface of the pile body is movably clamped on the lower surface of the bearing carrier, the lower part of the bearing carrier is provided witha flange disc, the flange disc is provided with an upper hydraulic lever which is arranged vertically and downwards, the lower end of the upper hydraulic lever is provided with a connecting disc, theconnecting disc is hinged with a connecting rod, and the end part of the connecting rod is hinged with the inner support baffle.

Description

technical field [0001] The invention relates to an offshore piling ship and its mechanical equipment, in particular to a variable-diameter pile cap structure of foundation piles for offshore construction. Background technique [0002] At present, in the construction process of laying foundation piles for offshore buildings, the foundation piles are usually hammered into the expected depth by piling with a piling hammer. In order to prevent deformation of the foundation pile top during pile driving, it is necessary to add a pile driving cap on the foundation pile. [0003] The foundation piles used in offshore construction have different diameters. The existing pile driving caps can only be used for piles with specific diameters. For the piling problem of foundation piles with different diameters, only pile driving caps corresponding to specific diameter foundation piles can be manufactured. The overall The manufacturing cost is expensive, and the pile cap needs to be replac...

AI Technical Summary

Problems solved by technology

[0003] The foundation piles used in offshore construction have different diameters. The existing pile driving caps can only be used for piles with specific diameters. For the piling problem of foundation piles with different diameters, only pile driving caps corresponding to specific diameter foundation piles can be manufactured. The overall The manufacturing cost is expensive, and at the same time, the pile cap needs to be replaced during the construction process, and the work efficiency is low

[0004] The Chinese patent with the application number 201310163667.9 discloses a six-wing structure piling cap for offshore riser conduits, which cannot be changed in diameter and has not been improved at the top of the pile cap, and has a relatively low service life; the application number is 201720971213.8 The Chinese patent discloses a movable replacement pile driving cap, which also cannot achieve diameter change and has no internal support device, which may easily cause deformation of the top of the foundation pile during the piling process.

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