Stress analysis and suggestions for pipelines in underwater drilling and blasting tunnels

Guiwu Han; Liang Feng; Chenwu Wang; Jinwen Li

doi:10.1117/12.2679504

18 July 2023 Stress analysis and suggestions for pipelines in underwater drilling and blasting tunnels

Guiwu Han, Liang Feng, Chenwu Wang, Jinwen Li

Proceedings Volume 12722, Third International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2023); 1272203 (2023) https://doi.org/10.1117/12.2679504
Event: International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2023), 2023, Hangzhou, China

Abstract

After tunnel construction completion, it’s difficult to ensure the drying tunnel due to the distribution of rock joint fractures and confined water. Usually, the pipeline operation in underwater tunnels is filled with water. In this article, it collected some serious pipeline displacements, pipe deformations, and bolts falling off during the later operation of an oil and gas pipeline tunnel. It uses the finite element calculation method according to the actual working conditions of the pipeline installation to simulation of the pipeline state taking consideration of the combined factors such as internal pressure, temperature difference, water buoyancy load, and collar constraints. Three operation conditions of water filling operation, pumping inspection and refilling are considered, and simulation calculations are performed. The calculation results show that although the pipeline is in a safe stress state, but the bearing bolts near the pipe elbow have excessive stress. The results of numerical calculations explain the cause of the problem, and put forward suggestions for pipeline repair as a basis.

Citation Download Citation

Guiwu Han, Liang Feng, Chenwu Wang, and Jinwen Li "Stress analysis and suggestions for pipelines in underwater drilling and blasting tunnels", Proc. SPIE 12722, Third International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2023), 1272203 (18 July 2023); https://doi.org/10.1117/12.2679504

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