关于成层土地基极限承载力的计算方法

目前，成层地基尚缺乏成熟的计算方法，本文在迈耶霍夫和汉纳的成层土地基极限承载力理论的基础之上对他们的极限承载力公式初步进行了探讨和改进，同时讨论了汉森的加权平均法、扩散角法等不同的地基极限承载力计算方法，并根据在天津港进行的大规模载荷实验结果对这些计算方法进行了检验。其结果表明对于成层土地基极限承载力的计算，由迈耶霍夫和汉纳的理论所得的计算结果与实测值比较接近，今后应进一步研究该方法的应用。

Methods for Calculation of Ultimate Bearing Capacity of Stratified Soils

There still lack mature methods for calculation of stratified soils.On the basis of Meyerhof and Hanna's theory of ultimate bearing capacity of stratified soils,the authors made herein discussions and improvement on the expressions for ultimate bearing capacity proposed by Meyerhof and Hanna.At the same time,they have also made discussions on the methods for calculation of the ultimate bearing capacity of soils,such as Hanson's weighted average method and the projected area method.The methods were also checked and verified with the results of the large-scale loading tests carried out at the Port of Tianjin and the verification indicates that,for calculation of the ultimate bearing capacity of stratified soils,the calculated results derived from Meyerhof and Hanna's theory are more closer to the measured results.Therefore,it is necessary to further study the use of the methods in future.