天然地基承载力公式分析研究

《北京地区建筑地基基础勘察设计规范》(DBJ01-501-92)和国标《建筑地基基础设计规范》(GB50007-2002)的承载力公式是分别建立在刚塑体模型和弹塑体模型基础上的,北京规范中又规定了几个不同的承载力计算方法,但并未说明这几个公式间的异同。本文试图探索一下地基承载力公式计算结果的异同,并且通过计算结果的分析建议了比较适合北京地区的承载力计算公式。本文还通过对承载力深宽修正系数的分析,提出了对深宽修正系数修订的相关建议。

Bearing capacity formula of building foundation soils is formed separately on the basis of rigid-plastic model and plastic-elastic model in Local Code of Building Foundation Design and Site Investigation in Beijing Area, NO. DBJ01-501-92, and National Code for Design of Building Foundation, NO. GB50007-2002. There are a couple of formulae given in Local Code to calculate bearing capacity of foundation soils, but similarities and differences are not shown clearly. This paper focused on discussing all these formulae with their computed results, and thus recommended the most applicable one to Beijing Area. Then proposal on coefficients for modifying affection of foundation width and depth was given after correlative analysis.