砂桩处理淤泥质黏土地基承载力性能研究

采用规范经验公式,计算不同桩土应力比时砂桩处理复合地基承载力,并应用有限元分析软件计算淤泥质黏土原始地基、砂桩所用中粗砂对应地层以及复合地基承载力值。对比分析淤泥质黏土原始地基承载力计算值与地勘值,以及对比有限元计算与按照规范经验公式计算得到的复合地基承载力。结果表明:采用有限元计算得到原始地基承载力与地勘值较为吻合;按照规范经验公式进行计算,不同桩土应力比对应的复合地基承载力大小有较大差别;数值计算得到的复合地基承载力特征值,与按照规范经验公式桩土应力比取为3.5计算得到的地基承载力能够很好吻合。相应研究成果可对砂桩处理软弱地基承载力的计算提供一点借鉴。

Research on bearing capacity of mucky clay foundation by using sand piles

Standard empirical formulae were used to calculate the capacity of sand piles reinforcement foundation with different pile-soil stress ratio, and the capacity of mucky clay foundation, sand pile and composite foundation were calculated by using finite element analytical method. The calculated value and geological reconnaissance value of mucky clay foundation capacity were compare analyzed. The calculating result of composite foundation capacity by using finite element analytical method and standard empirical formulae were compare analyzed too. The results show that the value of mucky clay foundation capacity which calculated by using finite element analytical method agree with geological reconnaissance value. The value of composite foundation capacity has a great difference by using standard empirical formulae with different pile-soil ratio. The value of composite foundation capacity calculated by standard empirical formulae agree with numerical result, when the pile-soil ratio was 3.5. Research result can provide reference for calculating of bearing capacity of mucky clay foundation by using sand piles.