In this paper,an example of a pipeline project in Henan Province was introduced,which caused disturbance to the severely liquefied site during the construction of steel sheet pile,resulting in ground cracking and structural damage.Through the analysis of the accident causes and the comprehensive consideration of vari-ous adverse factors of the site,and the comparison of several common methods for the treatment of liquefaction site,it was concluded that the method of pressure grouting could eliminate liquefaction and could be applied to the foundation treatment of existing pipelines in the liquefaction site.
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