Abstract
The repair of offshore platform jackets is an important research direction in marine engineering, among which the grouting clamp reinforcement is the most widely used. In order to solve the hydrodynamic force of the grouting hoop under the joint action of wave and current in the complex sea condition, the Morison formula is used to analyze the linear wave load on the grouting hoop; then, based on the Morison formula, load force under the combined action of the wave and the ocean current on the clamps in different installation states was determined; finally, the screw jack and car jack were used to carry out the experiment of preventing the clamp from falling off. The mechanical grouting clamp experiment and the wedge tooth experiment were carried out at the same time. The innovative design of the mechanical grouting clamp, analyzed analogously through relevant experimental results and numerical analysis results confirmed that the reinforcement and repair method of the designed grouting clamp is of great help to the safety and reliability of the offshore platform jacket.
Highlights
The jacket offshore platform is the most widely used of steel pile foundation platforms and is used in major bays around the world
In the past 30 years abroad, the United States, the Netherlands, Norway, the United Kingdom and other countries have carried out a lot of research on the repair and reinforcement technology of damaged structures on offshore platforms
The grouting clamp repair and reinforcement technology have been maturely used in marine engineering
Summary
The jacket offshore platform is the most widely used of steel pile foundation platforms and is used in major bays around the world. The offshore platform of the jacket will be affected by the severe and harsh marine environment such as sea breeze and current. Once it is damaged, the loss is huge, so it puts higher engineering requirements and safety challenges on the jacket offshore platform. As a device for reinforcing and repairing offshore platforms, grouting clamps are subject to loads from the ocean, mainly wave loads and current loads [1]
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