基于经验数据、动态测试和数值模拟的桩承载力研究

Q4 Engineering
Tsaana Khoirunisaa, Bambang Setiawan, Yusep M. Purwana
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引用次数: 0

摘要

轴向承载力是地基设计中的一个重要因素。由于轴向承载力在桩基设计中的重要作用,它必须能够承受上部结构的荷载而不发生明显变形。从经验方法和数值方法中可以看出,桩的轴向承载力可以通过打桩分析仪试验进行预测,该试验在试验过程中使用了波方程分析。通过将波浪方程分析与动态桩监测相结合,可以预测轴向承载力及其分布。本文将 PDA 记录获得的桩轴向承载力与使用经验法、数值法和静载试验解释法获得的预测轴向承载力进行了比较。经验方法使用了在现场进行的 NSPT 钻孔测试数据,本研究中使用的有限元方法是 Plaxis 8.6。这两种方法都与轴向承载力的 PDA 试验结果进行了比较。桩轴向承载力和地基沉降的计算结果存在差异值。与 PDA 相比,经验法的轴向承载力偏差最小,为 -268.45 kN,百分比为 -6.05%,沉降量最小,为 0.0044 m。因此,在所有方法中,Qult 和 PDA 结果偏差最小的是有限元方法。这是由于在 Plaxis 程序中输入并分析了许多数据参数,因此计算分析的结果更加详细,也更接近研究现场的情况。轴向承载力的差异可能是由于试验的进行方式造成的,而试验的进行方式则取决于操作人员的准确性和计算中使用的参数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
ИССЛЕДОВАНИЕ НЕСУЩЕЙ СПОСОБНОСТИ СВАЙ НА ОСНОВЕ ЭМПИРИЧЕСКИХ ДАННЫХ, ДИНАМИЧЕСКИХ ИСПЫТАНИЙ И ЧИСЛЕННОГО МОДЕЛИРОВАНИЯ
Axial bearing capacity is an important factor in designing of foundation. It must be able to carry the load of upper structure without any significant deformation due to important role in pile design. A part from empirical and numerical methods, axial pile bearing capacity can be predicted by pile driving analyzer test that use wave equation analysis during the test. Prediction of the axial bearing capacity and its distribution can be achieved by combining wave equation analysis with dynamic pile monitoring. This paper compares the axial capacity of pile obtained from PDA records with predicted axial capacities obtained using empirical, numerical, and interpretation of static load test method. The empirical method used NSPT data from bore testing that conduct in site, finite element method that uses in this study is Plaxis 8.6. Both of them was compared with PDA test result of axial bearing capacity. There is a difference value of the calculation results of axial pile bearing capacity and foundation settlement. Comparing with PDA, from empirical method has smallest deviation for axial bearing capacity which equal to -268.45 kN with percentage -6.05%, smallest settlement equal to 0,0044 m. Plaxis result shows that distinction between Qult result equal to -11.00 kN with percentage -0.24% and settlement of foundation equal to 0,005 m. From interpretation of static loading test method smallest deviation for Qult which equal to -40,00 kN, with percentage -0,90%, and smallest settlement equal to 0,0055 m. So, from all method the smallest deviation for Qult and PDA result is used finite element method. This is due to many data parameters has been inputted and analyzed in the Plaxis program, so the results of calculation analysis are more detailed and closer to the situation in the research site. Differences in axial bearing capacity can be caused by the test was carried out which depends on the accuracy of operator and parameters that used in the calculations.
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来源期刊
CiteScore
0.80
自引率
0.00%
发文量
43
审稿时长
4 weeks
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