Evaluation method of anti-liquefaction effect of stone column composite foundation in strong earthquake areas
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    Abstract:

    The stone column method is a widely used anti-liquefaction foundation treatment technology.Currently,existing Chinese specifications mainly consider the effect of stone columns on the densification of soil between columns in the design and testing and acceptance phases of the stone column,while ignoring the drainage effect and shear stress redistribution effects on anti-liquefaction.In the strong earthquake area,the requirement for an anti-liquefaction foundation is high.If the stone column treatment only considers the effect of densification of soil between columns,it will lead to a high replacement rate of stone columns and cause engineering waste.In view of the lack of testing and evaluation methods for the comprehensive anti-liquefaction effect of stone column composite foundation in China and abroad,this paper refines the core elements of the evaluation for the anti-liquefaction effect of stone column composite foundation and proposes the evaluation methods for each of the three major anti-liquefaction effects based on the calculation formulae for the three major anti-liquefaction effects of stone column composite foundation,namely densification,drainage,and shear stress redistribution.Combining with engineering examples,the paper also puts forward the process of testing and acceptance of the anti-liquefaction effect of stone column composite foundation in strong earthquake areas and the comprehensive evaluation method,which can provide a reference for the testing and evaluation of the anti-liquefaction effect of similar foundation reinforced by stone columns.

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朱明星,刘 军,陈平山,梁小丛.强震区碎石桩复合地基抗液化效果评价方法[J].水运工程,2023,(12):190-197

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  • Received:
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  • Online: December 13,2023
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