Protection Control Scheme and Evaluation of Effects on Pipeline Crossing beneath Landslide Area
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 4, Issue 1
Abstract
Long-distance natural gas transmission pipelines are planned to pass through the mountain area of midwest China, portions of which are threatened by severe landslide hazards. Therefore, the protection plan and control scheme for pipelines traversing and/or exiting landslide areas are of increasing interest and importance. A typical landslide in western China was used as an example to implement the strategy and evaluate the safety for a typical underground pipeline crossing the landslide area. The investigation and resulting control measures are based on the engineering geological study, and the numerical (finite-difference) interactive model of the pipeline and landslide, including the effect of soil arching. The effect of key design factors, including the spacing of antisliding piles, is determined by three-dimensional finite-difference numerical modeling. This technique also calculates the stability coefficient by use of the strength reduction method and calculation of stress and displacement fields. The results show that the recommended deployment of the antisliding piles can dramatically improve stability by reducing the effect of the landslide, thereby maintaining the displacement and stress of the pipeline within acceptable limits.
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Acknowledgments
The work was funded by the National Natural Science Foundation of China (No. 41202198), the National Basic Research Program of China (973 Program) (No.2011CB710604), the Special Fund for Basic Scientific Research of Central Colleges, China University of Geosciences (Wuhan) (CUG090104), the Excellent Young Teacher Science and Technology Program of Faculty of Engineering, China University of Geosciences (gcxy200901), and the Engineering Research Center of Rock-Soil Drilling and Excavation and Protection, Ministry of Education (200901). The writers would like to extend their most sincere gratitude to the friends who provided help during the writing of this paper.
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 4 • Issue 1 • February 2013
Pages: 41 - 48
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Feb 4, 2012
Accepted: Oct 2, 2012
Published online: Oct 4, 2012
Published in print: Feb 1, 2013
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