碎石桩处理液化地基效果评价

Evaluation method for liquefaction discrimination of gravel columns composite ground

本文在考虑碎石桩排水和应力集中作用的基础上分析了碎石桩处理液化地基后复合地基的抗液化能力,并与自由场液化地基的抗液化能力进行了对比,提出了一种适用于碎石桩复合地基修正“Seed简化法”,可应用标准贯入试验对液化地基的处理效果进行评价。

In this article the potential for the liquefaction ofgravel column composite foundation is evaluated by treating the soil as if it were sand field. Theory research indicates that the drainage and the stress concentration of gravel column have a substantial influence on the liquefaction resistance of sands. Modifications of the typical free-field liquefaction analysis procedure to account for existence in the drainage and the stress concentration of gravel column are suggested, At last, an example is calculated by the modification procedure, which indicates the potential for liquefaction damage is lesser in the gravel column foundation.