岩土与地下工程 2025年 第卷 第07期

DOI: 10.7672 / sgjs2025070112

高速公路拼宽路基差异沉降特性及工程应用分析

陈磊，贺亮，魏李，韩统领，侯长军

作者简介：

陈磊，高级工程师，硕士，E⁃mail:357323853@ qq. com

作者单位：

中交三航局第九工程有限公司，重庆 400012

基金项目：

∗河南省科技计划（202102310939）

摘要：

为优化拼宽路基施工工艺，减小新旧路基差异化沉降，依托长修高速公路拼宽路基工程项目，利用 FLAC3D有限差分数值模拟软件建立拼宽路基数值仿真分析模型，揭示高速公路拼宽路基在施工和运营过程中的路基路面沉降规律，并通过改变老路基开挖台阶数量、宽度和新路基的坡面放坡坡度等参数，构建不同的拼宽路基施工工况，分析不同影响因素对高速公路拼宽路基差异化沉降的影响，数值模拟结果与现场监测结果拟合较好，验证了数值模型的可靠性。旨在优化拼宽路基设计施工参数，提高工程质量和使用寿命。
高速公路；路基；差异化沉降；数值模拟；监测

English：

To optimize the construction technology of widened subgrade and reduce the differentialsettlement of new and old subgrade, based on the widened subgrade project of Changyuan⁃XiuwuExpressway, the numerical simulation analysis model of widened subgrade is established by usingFLAC3D finite difference numerical simulation software to reveal the settlement law of subgrade andpavement during the construction and operation of widened subgrade of expressway. By changing thenumber and width of excavation steps of the old subgrade and the slope gradient of the new subgrade,different construction conditions of the widened subgrade were constructed, and the influence of differentfactors on the differential settlement of the widened subgrade of the expresswaywas analyzed. Thenumerical simulation results are in good agreement with the field monitoring results. The reliability of thenumerical model has been verified. The aim of the study is to optimize the design and constructionparameters of the widened roadbed and improve the quality and service life of the project.