Analysis of Disaster Factors of Slope Erosion for Oil and Gas Pipelines Crossing Alluvial Fans

doi:10.11885/j.issn.1674-5086.2017.12.08.01

Abstract

Abstract: Slope erosion is one of the major geological disasters that causes pipeline damage. The damage induced by slope erosion involves a complex process and is affected by multiple indicator factors. In this study, the weights of each indicator factor are determined based on the entropy weight method. The distance to the water outlet is found to possess the highest weight of 24%. Furthermore, a 50 m buffer zone is constructed along the two sides of pipeline using GIS. The erosion strength of the buffer zone is obtained by performing a spatial weight stacking analysis. Taking the erosion strength of the disaster site as a statistical indicator, we performed statistical analyses of six parameters, including the impact resistance of slope erosion, permeability, vegetation, slope, distance to water outlet, and water volume. The results show that the slope erosion strength is positively related to the permeability, the slope, and the water volume. The impact resistance and vegetation are found to be negatively related to the erosion strength. In summary, the erosion strength becomes stronger with decreasing distance to the water outlet.

Key words: slope erosion, geographic information system, alluvial fan, entropy weight method, erosion strength

CLC Number:

TE89

WANG Qingdong, WANG Pengfei, WANG Zishuai, PAN Songjie, LI Cece. Analysis of Disaster Factors of Slope Erosion for Oil and Gas Pipelines Crossing Alluvial Fans[J]. 西南石油大学学报(自然科学版), 2018, 40(6): 157-164.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2017.12.08.01

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2018/V40/I6/157

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