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本文在考虑桩—土动力相互作用的基础上,为桩基础在现场进行动力测试提供了一种理论基础和合理可行的试验方法。采用了模态分析方法和CAT(计算机辅助试验)方法对桩基进行了模态参数识别。在桩基础模型动力试验中,得出了桩—土体系的前几阶弯曲模态和固有频率,并且把模型试验结果和理论计算结果进行了比较和分析,最后,归纳出桩的动力特性随着周围填土厚度的变化而改变的规律。本人还编制了计算桩基础动力特性的计算机程序BG,其计算结果和试验结果基本一致。
On the basis of considering the pile-soil dynamic interaction, this paper provides a theoretical basis and a reasonable and feasible test method for the pile foundation dynamic test in the field. The modal parameters identification of the pile foundation is carried out by using modal analysis method and CAT (computer aided test) method. In the dynamic test of pile foundation model, the first several bending modes and natural frequencies of pile-soil system are obtained, and the results of model test and theoretical calculation are compared and analyzed. Finally, the dynamic characteristics of pile Around the fill thickness changes and changes in the law. I also prepared a computer program to calculate the dynamic characteristics of pile foundation BG, the calculation results and the test results are basically the same.