摘要
为实现桥梁桩基长期沉降特征的高精度预测,该文以指数模型、Logistic模型和Gompertz模型为基础,利用熵权法获得各基础模型的权重值,构建组合预测模型。以刘介章特大桥7号墩、瓦屋特大桥18号墩以及建国大桥2号墩三个工程案例实际监测数据为基础,采用各单一预测模型和组合预测模型对其长期沉降特征进行预测。结果表明:组合预测模型结合了各单一模型的优势,具有较好的预测精度以及较强的非线性表征能力,可有效实现桥梁桩基沉降全过程的高精度预测,与实际工程情况更为贴合。
In order to achieve the high-precision prediction of long-term settlement characteristics of bridge pile foundations,based on the exponential models,Logistic models and Gompertz models this paper uses the entropy weight method to obtain the weight values of each basic model and to construct a combined prediction model.Based on the actual monitoring data of three project cases named Pier 7 of Liu Jiezhang Grand Bridge,Pier 18 of Wawu Super Bridge,and Pier 2 of Jianguo Bridge,each single prediction model and combination prediction model are further used to predict their long-term settlement characteristics.The results show that the combined prediction model combines the advantages of each single model,has better prediction accuracy and strong nonlinear characterization ability,can effectively achieve high-precision prediction of the entire process of bridge pile foundation settlement,and it is more consistent with actual engineering conditions.
作者
余江
Yu Jiang(Zhongda Intelligent Technology Co.,Ltd.)
出处
《勘察科学技术》
2023年第5期17-21,64,共6页
Site Investigation Science and Technology
关键词
桥梁桩基
沉降预测
组合模型
熵权法
bridge pile foundation
settlement prediction
combined model
entropy weight method
作者简介
余江(1986-),高级工程师,主要从事桥梁工程检测方面的工作。
