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郑其华¹ ,  薛    齐²

( 1 .  云南交通职业技术学院 ，昆明 650000 ;  2.  浙江交投交通建设有限公司 ，杭州 310000)

摘   要 ：为了提高预测结果精度，提出基于灰色理论模型和非线性映射的大跨度公路桥梁桩基极限承载力预测方法。根据大跨度公路桥梁桩基的受力区域计算荷载传递参数，建立灰色理论模型对参数序列进行还原处理，对还原后的参数进行非线性映射，降低参数维度，计算桩基承载力并基于计算结果进行预测。结果表明：所 提方法预测的均方误差较低，均值仅为 0. 042,  预测结果较为准确，满足了大跨度公路桥梁桩基的施工设计需求。

关键词：极限承载力预测 ；大跨度公路桥梁 ；桩基 ；灰色理论模型 ；非线性映射 ；桥梁桩基承载力 

中图分类号：TU473 . 1 + 6           

文献标志码：A            

文章编号： 1005- 8249  (2025)  02- 0160- 04 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .02.027

 

ZHENG Qihua¹  ,  XUE Qi²

( 1 . Yunnan Communications Vocational and Technical College ,   Kunming 650000 ,   China;

2. Zhejiang Jiaotou Transportation Construction Co . ,   Ltd. ,   Hangzhou 310000 ,   China)

Abstract: Conventional prediction of the ultimate bearing capacity of long-span highway bridge pile foundation mainly uses the method of extracting characteristic parameters for iterative optimization to obtain the prediction results, ignoring the influence of characteristic parameter dimensions on the prediction results, resulting in a large Mean squared error of the prediction results. Therefore, a prediction method of the ultimate bearing capacity of long-span highway bridge pile foundation based on the grey theory model and nonlinear mapping is proposed. The load transfer parameters are calculated according to the stress area of the pile foundation of the long-span highway bridge, and the grey theoretical model is established to restore the parameter sequence. The restored parameters are nonlinear mapped to reduce the parameter dimensions, calculate the bearing capacity of the pile foundation, and predict based on the calculation results. The experimental results show that the Mean squared error of the prediction results obtained after the proposed application is low, the average value is only 0.042, and the prediction results are relatively accurate, meeting the construction design requirements of long-span highway bridge pile foundations.

Keywords: prediction of ultimate bearing capacity; large span highways; highway bridge pile foundation; grey theory model; nonlinear mapping; bearing capacity of bridge pile foundation

基金项目： 云南交通职业技术学院科学研究重点基金项目 (2023KJ002) 。

作者简介：郑其华  (1973—) ,  男，硕士，副教授／高级工程师，研究方向：道路与桥梁工程勘察 、设计 、施工、检测等专业 技术理论研究及实践应用。

收稿日期：2023- 08- 18