Push Force Analysis of Anchor Block of the Oil and Gas Pipeline in a Single-Slope Tunnel Based on the Energy Balance Method

In this paper, a single-slope tunnel pipeline was analysed considering the effects of vertical earth pressure, horizontal soil pressure, inner pressure, thermal expansion force and pipeline-soil friction. The concept of stagnation point for the pipeline was proposed. Considering the deformation comp...

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Bibliographic Details
Published in:PloS one 2016-03, Vol.11 (3), p.e0150964-e0150964
Main Authors: Yan, Yifei, Zhang, Lisong, Yan, Xiangzhen
Format: Article
Language:English
Subjects:
Analysis
Analytical methods
China
Civil engineering
Computer and Information Sciences
Construction costs
Deformation
Design and construction
Earth pressure
Earthquakes
Energy balance
Energy industry
Engineering and Technology
Finite element method
Gas pipeline construction
Gas pipelines
Gas transmission
Mathematical analysis
Medicine and Health Sciences
Methods
Models, Theoretical
Natural Gas
People and Places
Petroleum
Physical Sciences
Pressure
Pressure effects
Seismic engineering
Slopes
Stagnation
Stagnation point
Thermal expansion
Transportation
Tunnels
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Summary:In this paper, a single-slope tunnel pipeline was analysed considering the effects of vertical earth pressure, horizontal soil pressure, inner pressure, thermal expansion force and pipeline-soil friction. The concept of stagnation point for the pipeline was proposed. Considering the deformation compatibility condition of the pipeline elbow, the push force of anchor blocks of a single-slope tunnel pipeline was derived based on an energy method. Then, the theoretical formula for this force is thus generated. Using the analytical equation, the push force of the anchor block of an X80 large-diameter pipeline from the West-East Gas Transmission Project was determined. Meanwhile, to verify the results of the analytical method, and the finite element method, four categories of finite element codes were introduced to calculate the push force, including CAESARII, ANSYS, AutoPIPE and ALGOR. The results show that the analytical results agree well with the numerical results, and the maximum relative error is only 4.1%. Therefore, the results obtained with the analytical method can satisfy engineering requirements.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0150964