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Mechanical Analysis and Control Strategy of Pipeline beneath Landslide Area under Different Crossing Angles
Long-distance natural gas transmission pipelines are designed to cross large-scale mountain areas with the start of the West-East Gas Pipeline Project in China. A great portion of the pipelines are now threatened by severe landslide hazards. The pipelines could fail, resulting in a great loss because of the landslide failure deformation. Therefore, the spatial arrangement plan of an underground pipeline crossing landslide areas is one of the key problems. This paper presents a new mechanical model of pipeline and landslide under trapezoidal landslide force to conduct the mechanical analysis on deformation of pipeline. A series of shear force, bending moment and defection of pipeline under landslide with different crossing angles can be deduced according to the simplified model presented. Based on a case study of a typical landslide with pipeline underground crossing, the geological mechanical model of landslide and pipeline system can be established. The mechanical characteristics of a pipeline can be conducted under the driving force of a landslide by utilizing mechanics theory so as to determine the position of maximum stress point along the pipeline. Consequently, the optimal crossing depth and orientation of a pipeline can be obtained. The result shows that the proper setting of crossing angle and buried depth can effectively improve the safety of pipelines. Corresponding control strategy suggestions for similar pipeline projects are proposed, as well.
Mechanical Analysis and Control Strategy of Pipeline beneath Landslide Area under Different Crossing Angles
Long-distance natural gas transmission pipelines are designed to cross large-scale mountain areas with the start of the West-East Gas Pipeline Project in China. A great portion of the pipelines are now threatened by severe landslide hazards. The pipelines could fail, resulting in a great loss because of the landslide failure deformation. Therefore, the spatial arrangement plan of an underground pipeline crossing landslide areas is one of the key problems. This paper presents a new mechanical model of pipeline and landslide under trapezoidal landslide force to conduct the mechanical analysis on deformation of pipeline. A series of shear force, bending moment and defection of pipeline under landslide with different crossing angles can be deduced according to the simplified model presented. Based on a case study of a typical landslide with pipeline underground crossing, the geological mechanical model of landslide and pipeline system can be established. The mechanical characteristics of a pipeline can be conducted under the driving force of a landslide by utilizing mechanics theory so as to determine the position of maximum stress point along the pipeline. Consequently, the optimal crossing depth and orientation of a pipeline can be obtained. The result shows that the proper setting of crossing angle and buried depth can effectively improve the safety of pipelines. Corresponding control strategy suggestions for similar pipeline projects are proposed, as well.
Mechanical Analysis and Control Strategy of Pipeline beneath Landslide Area under Different Crossing Angles
Wang, Jiao (author) / Li, Changdong (author) / Liang, Deming (author) / Liu, Qingtao (author)
International Conference on Pipelines and Trenchless Technology ; 2013 ; Xi'an, China
ICPTT 2013 ; 296-310
2013-10-01
Conference paper
Electronic Resource
English
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