当前位置: X-MOL 学术Int. J. Numer. Anal. Methods Geomech. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Approach for defective floating pile embedded in layered saturated soils and application in pile integrity test
International Journal for Numerical and Analytical Methods in Geomechanics ( IF 4 ) Pub Date : 2022-07-28 , DOI: 10.1002/nag.3432
Kun Meng 1, 2 , Chunyi Cui 2 , Chenshun Xu 3 , Benlong Wang 2 , Yu Xin 2 , Zhimeng Liang 2
Affiliation  

In this study, a novel analytical method combining a 3D continuum model, Biot propagation theory, a fictitious saturated soil pile (FSSP) model, and a heterogeneous pile model is proposed to analyze the dynamic response of a defective floating pile embedded in saturated soils. The vertical velocity of the defective pile in the frequency domain is obtained by introducing the complete coupling conditions of the pile and soil. With the most widely used half-sine pulse as the excitation force in the low-strain integrity testing of the pile, the solution is extended to the time domain using the inverse Fourier transform (IFT). The rationality and accuracy of the proposed approach are verified via comparison with previous methods and measured data from an engineering example. Parametric analyses are also conducted to investigate the quantitative relationship between the pile defect parameters and the dynamic response characteristics of a defective pile. It is indicated that the depth and length of a pile defect can be roughly evaluated using the proposed methodology when clear signals are reflected from pile defect interfaces in practical engineering.

中文翻译:

层状饱和土埋设缺陷浮桩方法及在桩体完整性试验中的应用

在这项研究中,提出了一种结合 3D 连续体模型、Biot 传播理论、虚拟饱和土桩 (FSSP) 模型和异质桩模型的新分析方法,用于分析嵌入饱和土中的缺陷浮桩的动力响应。通过引入桩与土的完全耦合条件,得到缺陷桩在频域的垂直速度。以应用最广泛的半正弦脉冲作为桩基低应变完整性测试中的激振力,利用傅里叶逆变换(IFT)将解扩展到时域。通过与以往方法的比较和工程实例的实测数据,验证了所提方法的合理性和准确性。还进行了参数分析以研究桩缺陷参数与缺陷桩的动态响应特性之间的定量关系。结果表明,在实际工程中,当从桩缺陷界面反射出清晰的信号时,使用该方法可以粗略地评估桩缺陷的深度和长度。
更新日期:2022-07-28
down
wechat
bug