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本文依据动刚度和承载力的机理分别建立了计算模型并对各种影响因素进行了分析,发现动刚度和承载力的变化规律有明显不同;影响换算系数α的因素包括桩长,桩径、桩端支承条件,桩身缺陷部位及严重程度等。因此在确定桩基承载力时,如只考虑动刚度往往会高估承载力指标,而应综合分析各种检测信息才能作出符合实际的评价。
Based on the dynamic stiffness and bearing capacity mechanism, this paper establishes a calculation model and analyzes various influencing factors. It is found that the dynamic stiffness and bearing capacity change laws are significantly different; factors affecting the conversion factor α include pile length, pile diameter, Pile end support conditions, pile defect location and severity. Therefore, when determining the bearing capacity of the pile foundation, if only the dynamic stiffness is considered, the bearing capacity index will be overestimated. However, a comprehensive analysis of various testing information is required to make a realistic assessment.