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STUDY ON CALCULATION METHODS OF BEARING CAPACITY RELIABILITY OF REINFORCED CLAY FOUNDATION
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摘要: 在给出加筋条形地基概率可靠度分析极限状态功能函数的同时,指出对计算模式汉森(Hassan)公式不确定性进行修正的必要性,并以汉森公式计算的均值与现场承载力试验的均值相等进行修正。同时考虑土性参数c与值的自相关性和负的互相关性,使条形地基承载力可靠度增加。对加筋条形地基可靠度计算中考虑了3种不确定性:1)材料参数的不确定性。2)荷载和作用因素的不确定性。3)计算模型的不确定性。最后指出,加筋地基可靠度计算方法是一个值得进一步研究的课题。Abstract: In this paper,the limit state function of a reinforced clay foundation,which was used in reliability analysis was obtained. At same time,the modification of the uncertainty of Hassan formula was done: the average value from Hassan formula was equal to the average value of limit bearing capacity obtained in site test. The selfcorrelation of soil character parameter and commutative correlation between soil character parameters were considered in the calculation of capacity reliability of reinforced clay foundation,with which the reliability of the foundation was increased. It was considered that the uncertainties of material parameters,load factors and calculation models. Finally,it is pointed out that a further study on the calculation methed of this sort of foundation is needed.
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