As an important means of foundation reinforcement treatment for hydraulic engineering,cement mixing pile can maximize the mechanical properties of undisturbed soil,with the characteristics of simple construction,low cost and less pollution.In order to ensure the quality of cement mixing pile and reduce the influence of uneven settlement of sand liquefaction foundation,taking the sand liquefaction foundation treatment project of Yanglin drainage gate in Guanxian county as an example,cement mixing pile was selected to strengthen foundation according to site construction and geological exploration.The optimum cement content and water-cement ratio of cement mixing pile are 22％and 0.5,respectively.The field load test and numerical simulation technology verify that the cement mixing pile has a good effect on the treatment of sandy soil liquefaction foundation,reducing the settlement value of the foundation by 35.5％,and improving the bearing capacity and settlement of the composite foundation.It provides reference for the subsequent treatment of sand liquefaction foundation in sluice.
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