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《Chinese Journal of Underground Space and Engineering》 2013-05
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Study on Safety of Pipe-Protection Cutoff Wall under Rainfall Erosion Effect Based on Fuzzy Comprehensive Judgment

Wang Huijiao;Li Yunpeng;Han Bing;College of Mechanical and Transportation Engineering,China University of Petroleum;China Petroleum Research Center of Pipeline Technology;  
Cut-off wall is an effective hydraulic structure to protect oil-gas pipeline,and would have a great impact on the safety and stability of oil-gas pipeline if it would be destroyed by rainfall erosion.Based on the structural styles and rainfall-caused damage characteristics of cut-off walls along the West-East pipe line in China,considering five possible failure modes of cutoff walls,using the theory of fuzzy mathematics,a weight-variation fuzzy comprehensive judgment model of cutoff walls' safety under rainfall erosion effect had been established.Combined with engineering examples to verify the reliability of the judgment model,the safety of the cutoff wall under different rainfall intensity had been analyzed.Studies have shown that the rainfall erosion effect of the cutoff wall increased with the elevated rainfall intensity,on the contrary,the corresponding safety is on the decline,and the safety factor of the cutoff wall is in a quadratic function with rainfall intensity within a certain range of rainfall intensity;The methods and results of the research have a certain reference value to the structural stability and safety judgment of similar oil-gas pipeline protection engineering.
【CateGory Index】: TU476.4
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