Abstract
The fault tree analysis method is used herein to carry on the process pipeline settlement analysis of gas transmission station in the Pearl River Delta soft soil area. Firstly, establish the pipeline settlement fault tree with the help of CAFTA fault tree analysis software. Next, carry on the qualitative analysis to the fault tree with the method of minimum cut set, further do the quantitative evaluation by expert estimation and fuzzy mathematics analysis method. In this way, main factors to the pipeline settlement and weak points of the foundation treatment are disdinguished. Finally, we point out the basic events which should be pay attention to during the gas pipeline project of the soft soil area.
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