Q_3与Q_4~1黄土地基承载力确定的新方法及应用评价

A New Method to Determine the Bearing Capacity of Loess Foundation of the Q_3and Q_4~1and it's Evaluation

为了评价基础尺寸效应对黄土地基承载力确定的影响,基于黄土地基载荷试验和地基承载力确定新方法,并对比分析了以往规范中地基承载力表存在的偏离问题,提出了适当的修正建议。研究表明:在大部分情况下,计算值与规范承载力表中的黄土地基承载力值是相符的,但在液限同孔隙比的比值较小时,规范承载力值趋于偏大,应将其适当调小;而当液限同孔隙比的比值较大时,规范承载力值趋于偏小,应将其适当调大。

In order to evaluate the effect of basic size effect on the determination of bearing capacity of loess foundation,based on the load test of loess foundation and the new method of determining the loess foundation bearing capacity,the deviation problems of the foundation bearing capacity table in the previous standard is analyzed,and appropriate amendments are proposed. Research shows that in most cases,the calculated value and the bearing capacity value of the loess foundation in the bearing capacity table of specification is consistent,but when the liquid limit with the ratio of void ratio is small,the bearing capacity value of specification tend to be high which should be lowered,and when the ratio of liquid limit with void ratio is high,the specification value tend to be small which should be improved.