Method for sinking ultra-long large-diameter permanent steel protective cylinder

Abstract

The invention relates to the technical field of ultra-deep water area pile foundation construction, and aims to provide a method for sinking an ultra-long large-diameter permanent steel protective cylinder. According to the technical scheme, the method is characterized in that hoisting, splicing and sinking of the steel protective cylinders are completed through the matching of a crawler crane with a gantry crane; after being spliced, the heavier steel protective cylinders are placed by the gantry crane, so that the characteristic of high lifting capacity of the gantry crane is utilized; a vibratory hammer is lifted by the crawler crane during vibration sinking, so that the advantage of flexible control of the crawler crane is effectively taken; lifting lugs at the top of the steel protective cylinder are adopted to hang the steel protective cylinder on a steel frame of an upper-layer guide frame to be vertically spliced with the subsequent steel protective cylinder, so that the problem that a traditional first-section steel protective cylinder is able to stand for being vertically spliced only after reaching a riverbed is solved; and roller limiters with rubber pads are arranged on the upper-layer guide frame and a lower-layer guide frame for limiting, so that the plane position and the vertical degree of the permanent steel protective cylinder are corrected, and damage of theroller limiters to an anti-corrosion coating of the permanent steel protective cylinder is effectively reduced by the rubber pads of the roller limiters. The method has the advantages of being convenient to construct, reliable in quality and remarkable in economical benefit.

Description

technical field [0001] The invention relates to the technical field of pile foundation construction in ultra-deep waters, in particular to a method for sinking a super-long-diameter permanent steel casing. Background technique [0002] The steel casing is a steel casing used to protect hole piles in the construction of pile foundations with unstable soil and prevent hole collapse from affecting construction progress and safety. Super long diameter permanent steel casings are more and more widely used in pile foundations in ultra-deep seas and inland waters. Generally, some large special equipment is required to complete the construction, such as large piling ships, floating cranes, and large lifting equipment. Wait. However, there are still some areas where large-scale equipment cannot enter in the construction of super long-diameter steel casings; or the total amount of the project is small, and it is uneconomical to use large-scale equipment. Therefore, it is of great en...

AI Technical Summary

Problems solved by technology

However, there are still some areas where large-scale equipment cannot enter in the construction of super long-diameter steel casings; or the total amount of the project is small, and it is uneconomical to use large-scale equipment.

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