摘要
我国地质条件多种多样,简单地将地基承载力理论计算公式应用到某一地区时,必然会带来公式的适应性问题,因此有必要对常用的理论计算公式加以校核和适当的修正。本文选取应用较为广泛的Terzaghi极限承载力公式、Hansen极限承载力公式以及临界承载力公式,在与合肥地区进行的一系列平板载荷试验结果进行对比分析,以确定哪个公式最能反映合肥地区地基土的承载特性。对比结果表明,p1/4承载力公式比较适合于合肥地区的地基承载力计算,其中持力层为粉质粘土的情况,建议选用直剪固快峰值强度指标;而持力层为粘土的情况,则建议选用70%的直剪固快峰值强度指标。
Due to the variety of geological condition,the applicable problem may occur if a bearing capacity formula is applied directly in an area,so it′s necessary to verify the applicability of theoretical calculation formulas commonly adopted.To determine which formula can better reflect the bearing capacity characteristics of foundation soil in Hefei area,the calculated results of Terzaghi′s ultimate bearing capacity formula,Hansen′s ultimate bearing capacity formula and critical bearing capacity formula,which are applied widely,are compared with the results of a series of plate load tests carried out in Hefei.The comparison results show that,the p1/4 formula is more applicable to bearing capacity computation in Hefei area,in which peak strength of consolidated quick direct shear test is fit for silty clay bearing stratum,and 70% of peak strength of consolidated quick direct shear test is fit for clay bearing stratum.
出处
《勘察科学技术》
2009年第6期9-12,17,共5页
Site Investigation Science and Technology
基金
合肥建委重点资助项目
