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鄭其華¹ ,  薛    齊²

( 1 .  云南交通職業技術學院 ，昆明 650000 ;  2.  浙江交投交通建設有限公司 ，杭州 310000)

摘   要 ：為了提高預測結果精度，提出基于灰色理論模型和非線性映射的大跨度公路橋梁樁基極限承載力預測方法。根據大跨度公路橋梁樁基的受力區域計算荷載傳遞參數，建立灰色理論模型對參數序列進行還原處理，對還原后的參數進行非線性映射，降低參數維度，計算樁基承載力并基于計算結果進行預測。結果表明：所 提方法預測的均方誤差較低，均值僅為 0. 042,  預測結果較為準確，滿足了大跨度公路橋梁樁基的施工設計需求。

關鍵詞：極限承載力預測 ；大跨度公路橋梁 ；樁基 ；灰色理論模型 ；非線性映射 ；橋梁樁基承載力 

中圖分類號：TU473 . 1 + 6           

文獻標志碼：A            

文章編號： 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

基金項目： 云南交通職業技術學院科學研究重點基金項目 (2023KJ002) 。

作者簡介：鄭其華  (1973—) ,  男，碩士，副教授／高級工程師，研究方向：道路與橋梁工程勘察 、設計 、施工、檢測等專業 技術理論研究及實踐應用。

收稿日期：2023- 08- 18