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本文介绍一种根据应力波理论预测桩的动承载力的新方法。有关测量桩侧及极端阻力的应用方法及理论根据也分别予以讨论。虽然CASE法和CAFWAP分析法已广泛应用于预测桩的承载力,但并未考虑桩的频率特牲。由于锤击力的频率和桩的反射波频率彼此存在很大的差异,在打桩过程中用CASE法难以预测土的阻力。将桩的响应频率低的同样测量频率用于入射波和反射波,以预测打桩时上的阻力。结果发现,本文所述方法与CAPWAP分析法预测的承载力几乎相等。
This paper presents a new method for predicting the dynamic bearing capacity of piles based on stress wave theory. The application methods and theoretical basis for measurement of pile side and extreme resistance are discussed separately. Although the CASE method and CAFWAP analysis method have been widely used to predict the bearing capacity of piles, the frequency of piles has not been considered. Because the frequency of the hammering force and the reflected wave frequency of the pile are very different from each other, it is difficult to predict the resistance of the soil by the CASE method during the driving of the pile. The same measuring frequency with a low response frequency of the pile is used for the incident wave and the reflected wave to predict the resistance at the time of driving. As a result, it was found that the bearing capacity of the method described in this article and CAPWAP analysis is almost equal.