Research on the Bearing Capacity of a Damaged Jacket Repaired by a Grouting Clamp Based on a Type of Wedge Gripping

Bo Zhang,Tao Wang,Zhuo Wang,Qing Rui Zhang

doi:10.3390/jmse8120973

Abstract

In the process of repairing a damaged jacket with a grouting clamp, it is necessary to analyze the bearing capacity of the damaged structure to determine whether it meets requirements for maintenance and reinforcement. On the basis of previous research results, this paper proposes a design scheme of a grouting clamp based on wedge gripping, which can effectively improve the local bearing capacity of the jacket by more than 35%. The elastic–plastic theory was used to analyze the bearing capacities of steel pipe piles under three different conditions (ideal steel pipe, bending steel pipe and steel pipe with a defective section) and with reinforcement by a grouting hoop. The bearing capacity of the mechanical grouting clamp was analyzed, and the resulting theoretical design was verified by a bearing performance experiment. The results support the conclusion that the wedge mechanical grouting clamp can effectively strengthen local jacket members.

Highlights

Over the 21st century, oil and gas reserves on land have been rapidly depleted, and marine environments are increasingly explored to obtain these resources
The most commonly repaired component of offshore platforms is the grouting clamp because this strategy is characterized by effectiveness, convenient construction and low cost [2]
In view of the previous achievements of different research institutions, this paper proposes a new type of wedge gripping for the grouting clamp

Summary

Introduction

Over the 21st century, oil and gas reserves on land have been rapidly depleted, and marine environments are increasingly explored to obtain these resources. In 2006, Zhao Xiaolin’s team from Monash University in Australia analyzed and studied the bearing capacity of grouting clamps under a harsh environment [7]. In 2018, Norwegians Johansen, A., Solland, G. and colleagues conducted a study on the grouting connection with shear keys of an offshore sheathed platform and determined its axial bearing capacity under cyclic load [17].

Results

Conclusion