吹填砂的液化评估

Liquefaction evaluation of hydraulic fill sand

在江海近岸滩地上筑堰吹填粉细砂来造地 ,既开发了滩涂 ,又疏浚了航道 ,还具有成本低的优点。吹填砂虽然强度较高 ,但地震时存在液化的问题。砂土液化常用美国的Seed法和日本路桥规范法进行评估 ,评价指标又有标贯击数和静力触探阻力。介绍了砂土液化的两种评估方法 ,分析探讨了它们的实质、差异原因和液化安全系数的取值 ,并对孟加拉某电厂吹填砂地基进行了液化评估。

There are many hydraulic fill projects on the overbank flood plain near river and sea.These projects not only utilize shallows-tidal-flat area but also benefit to dredge the waterways.Besides,the investment of developed land is rather low.Although the dredged sand has a higher strength,the earthquake liquefaction of sand should be considered.The U.S. Seed method and Japanese Road and Bridge Code are usually adopted for sand liquefaction evaluation.The adopted parameters,include the SPT blow count and CPT re...