Bottom supporting steel beam threading equipment and method for salvaging sunken ship

Abstract

The invention provides bottom supporting steel beam threading equipment and method for salvaging a sunken ship. The equipment comprises a working ship and a tunneling machine, a crane is arranged on the working ship, the tunneling machine is lowered to the bottom of water through the crane and comprises a mainframe for excavating muck, a bottom supporting beam steel connected at the rear end of the mainframe, a base for providing advancing thrust, a deslagging circulation system connected at the rear end of the bottom supporting steel beam and a control system arranged on the working ship, a clamping device and a propelling system for clamping and propelling the bottom supporting steel beam are arranged on the base, the mainframe and the bottom supporting steel beam are connected by meansof hinging, the control system can control the mainframe remotely to enable the same to excavate and tunnel and drive the bottom supporting steel beam to advance under action of the clamping device and the propelling system so as to thread the bottom supporting steel beam. The invention further provides a method for salvaging the sunken ship.

Description

technical field [0001] The invention relates to the technical field of salvage of sunken ships, in particular to a bottom-supporting steel girder threading device for salvaging sunken ships. The invention also relates to a piercing method for a bottom supporting steel beam used for salvaging a sunken ship. Background technique [0002] The seabed threading jack is a key part of the overall salvage process of a sunken ship, usually accounting for more than 50% of the underwater operation time of the entire salvage project. As the depth increases, the risk of underwater operations is greater and the underwater operation time is longer, which greatly increases the difficulty of salvage and construction costs. [0003] The main link in the salvage of sunken ships is the threading of steel cables or supporting steel beams at the bottom of the sunken ship. Among them, the steel cable threading is less difficult to construct than the steel beam threading because it only needs to ...

AI Technical Summary

Problems solved by technology

However, a large tonnage sunken ship has a large deadweight, which often compacts the seabed in the sunken area, resulting in a relatively dense soil condition in the support area at the bottom of the sunken ship

Existing methods of directly pushing steel beams or using high-pressure water to assist scouring are difficult to complete the excavation of holes efficiently, especially when encountering local hard geological conditions (such as rock formations), the penetration cannot be completed, and the steel beams cannot be accurately corrected

These are still only applicable to the situation where the seabed is soft and covered with soil, the penetration distance is not long, and it is difficult to penetrate under tight and hard geology

In addition, in the overall salvage process of large-tonnage sunken ships (such as large cargo ships, oil tankers, etc.), the size of the matching supporting steel beams is often larger, and the weight of the steel beams underwater is greater, making its movement and attitude adjustment more difficult.

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