Session: OAC-06-02 Continued Safe Operation of Existing Assets - 2

Paper Number: 106969

106969 - Stress Analysis and Backfilling Measures of Gas Pipeline Buried in Embankment of Tunnel 

Long distance pipelines are usually laid in tunnels to overcome the complexity of geological environment and reduce the construction and maintenance costs. However, pipelines in tunnels may fail for many reasons. Therefore, in order to reduce potential safety hazards and improve the reliability of pipelines, it is necessary to conduct stress analysis on pipelines crossing tunnels. In a project, the gas transmission pipeline in a tunnel is buried in embankment. Considering the surrounding actual conditions, pipeline operation status and other factors, it is necessary to formulate the pipeline backfilling plan and evaluate its stress level. To solve this problem, this paper establishes a model of the pipeline using finite element software, simplifies the constraints of the actual project, analyzes the stress and displacement under different conditions, and studies the influence of the buried depth and the overburden compaction multiplier on the stress. Through the above simulation, the distribution law of stress and displacement is obtained, and the reasonable buried depth and overburden compaction multiplier are found. Then, according to the simulation results, backfilling measures are taken and field tests are carried out to verify the correctness and effectiveness of the simulation method, which ultimately ensures the construction of the project and the safe operation of the pipeline.

Presenting Author: Jia Wu Zhejiang Academy of Special Equipment Science

Presenting Author Biography: Dr. Jia Wu, research interest is pipeline safety evaluation and fault diagnosis.

Authors:

Jia Wu Zhejiang Academy of Special Equipment Science
Li Xia Zhejiang Academy of Special Equipment Science
Ping Tang Zhejiang Academy of Special Equipment Science