Strain-based design for buried pipelines subjected to landslides

被引：24
|
作者：
Han Bing [1 ,3 ]
Wang Zhiyin [1 ]
Zhao Honglin [2 ]
Jing Hongyuan [3 ]
Wu Zhangzhong [3 ]
机构：
[1] China Univ Petr, Beijing Key Lab Urban Oil & Gas Distribut Technol, Beijing 102249, Peoples R China
[2] China Univ Petr, Coll Mech & Transportat Engn, Beijing 102249, Peoples R China
[3] PetroChina Pipeline R&D Ctr, Langfang 065000, Hebei, Peoples R China
来源：
PETROLEUM SCIENCE | 2012年 / 9卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Landslide; pipeline; strain-based design; numerical simulation; failure mode;
D O I：
10.1007/s12182-012-0204-y
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Landslides are one of the key problems for stability analysis of pipelines in the western region of China where the geological conditions are extremely complicated. In order to offer a theoretical basis for the pipe-soil interaction, the general finite element program ABAQUS is used to analyze the distribution of pipe strain caused by landslide through which the pipeline passes. In this paper the Ramberg-Osgood constitutive equation is used to study the strain-based mechanical characteristics of pipelines. Different calculation schemas are designed by considering the change of spatial relationship between pipeline and landslide, and the change of D/t, diameter-thickness ratio of pipeline. The results indicate that the pipeline is primarily subjected to tension stress when the landslide crosses the pipeline perpendicularly, the pipe strain is a maximum along the central axis of the landslide, and reverse bending occurs on pipeline at both edges of the landslide. The pipeline is primarily subjected to friction force caused by the downward movement of the landslide, and the friction force is relatively small when the landslide is parallel to the pipeline. The pipe strain is in proportional to D/t, and this means decreasing D/t can help to improve security of pipelines subjected to the landslide.
引用
收藏
页码：236 / 241
页数：6
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