| 风化砂岩层中扩底抗拔桩荷载-位移曲线拟合分析 |
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| 引用本文： | 唐黔,王良玉,杨柏,黄翔.风化砂岩层中扩底抗拔桩荷载-位移曲线拟合分析[J].路基工程,2021,0(2):94-98. |
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| 作者姓名： | 唐黔 王良玉 杨柏 黄翔 |
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| 作者单位： | 1.湖南省地质矿产勘查开发局四〇九地质队，湖南永州 425000 |
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| 基金项目： | 国家自然科学基金（51708146）；广西高校中青年教师科研基础能力提升项目（2020KY05035） |
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| 摘 要： | 基于抗拔桩极限载荷现场试验，用数学模型对风化砂岩层中扩底抗拔桩的上拔荷载-位移曲线进行拟合分析。结果表明:对于风化砂岩层中的抗拔桩，采用双曲线模型拟合的精度最高，指数函数模型次之，幂函数模型相对较差；双曲线函数计算得到的极限承载力取1.27折减系数后，与实测值更为接近；采用归一化荷载-位移曲线双曲线模型下限曲线函数计算风化砂岩层中抗拔桩的承载力，95 %的情况是偏于安全的。
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| 关 键 词： | 嵌岩扩底抗拔桩 数学模型 荷载-位移曲线 双曲线模型 极限承载力 风化砂岩 |
| 收稿时间： | 2020-06-08 |
Fitting Analysis of Load-displacement Curve of Belled Uplift Piles in Weathered Sandstone Layer |
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| Abstract: | Based on the field test of ultimate load of the uplift pile, the mathematical model is used to conduct fitting analysis on the uplift load-displacement curve of the belled uplift pile in the weathered sandstone layer. The results show that the hyperbolic model has the highest fitting accuracy, the exponential function model is the second, and the power function model is relatively poor; the ultimate bearing capacity calculated by the hyperbolic function takes 1.27 reduction coefficient, which is closer to the measured value; the lower limit curve function of the normalized load displacement curve hyperbolic model is used to calculate the bearing capacity of the uplift pile in the weathered sandstone layer and 95 % is partial to safety. |
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