水泥土搅拌桩复合地基承载力公式中折减系数β取值的分析

ANALYSIS OF REDUCED COEFFICIENT β IN FORMULA FOR BEARING CAPACITY OF CEMENT-SOIL MIXED PILE COMPOSITE FOUNDATION

水泥土搅拌桩复合地基承载力设计公式中的桩间土承载力折减系数 β值需根据经验确定 ,且取值范围较大。因此 ,要准确计算出复合地基承载力有一定难度。本文根据桩土共同作用机理 ,探讨了折减系数 β的各种影响因素。在比较研究了一些典型工程静载试验的实测资料之后 ,对系数 β的取值作了具体分析并给出了合理的建议值。

The reduced coefficient β in formula for designing for bearing capacity of cement-soil mixedpile composite foundation was determined by the experiences and the range of βis wide. So, it is difficult to accurately calculate bearing capacity of composite foundation. Based on the interaction of pile and soil, this paper discusses various factors influencing the reduced coefficient β. By comparing the field static load test results of some typical engineering projects, the reduced parameter β is analyzedand suggested its reasonable value.