Research on the Design of Oil&Gas Pipe Trench Based on Seismic Resistance

Author of the article:Quan Jia1,Li Shuyi2,Dong Jiangjie3,Bian Wenjuan1

Author's Workplace：China Petroleum Engineering&Construction Crop.Southwest Company 2.Sinopec Gas Company 3.PetroChina Xinjiang Oil Field Company No.1 Gas Production Plant

Key Words：Seismic wave;Finite element;Pipe trench

Abstract：With the continous development of society,buried pipelines have been widely used in oil and gas transportation,and their safety in geological disasters such as earthquakes has attracted great attention.Based on strain theory,this paper studies how to improve the seismic resistance of buried pipelines from the trench design.A three-dimensional finite element model of pipe-soil interaction is established by using ANSYS software.Under the effect of seismic wave,through strain analysis,the parameters of pipe trench(bottom width,slope,soil elastic modulus) are designed by finite element method to improve the seismic resistance of pipeline.Based on the sinusoidal displacement load of pipe-soil interacion model under different soil stiffness,the dynamic response of pipeline is analyzed,and the optimal scheme of pipe trench design is obtained to achieve safe and economical design.