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桥台后加筋回填设计计算方法

, PP. 17-26

Keywords: 道路工程,加筋路基,力学分析,设计计算方法,台背回填

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Abstract:

?为了给桥台后(台背)加筋回填的设计与施工提供参考,通过拔出破坏条件下加筋土单元力学分析,研究了加筋回填的强度参数换算和简化模拟方法;同时,基于已有的台背回填沉降研究成果,研究了台背加筋回填的设计指标与标准以及设计算法与流程。将该方法应用于实际工程,分析了施工期和竣工后加筋回填体沉降变化规律,并阐述了不同填料情况下设计指标验算过程,验证了推荐算法的可行性。研究结果表明:施工期总沉降绝大部分源于回填路基压缩沉降;地基条件良好情况下,工后总沉降大部分源于回填路基累积沉降;桥台容许沉降增加,则台背回填容许差异沉降或纵坡坡度要求相对降低。

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