论文部分内容阅读
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。
In order to provide reference for the design and construction of the reinforced backfill in the abutment (back), the mechanical analysis of the reinforced earth element under the destructed condition was carried out to study the intensity parameters conversion and simplified simulation method of the reinforced backfill. At the same time, Some backfill sedimentation research results, research backfill reinforced backfill design indicators and standards and design algorithms and processes. The method is applied to the actual project, the settlement regularity of reinforced backfill during construction and after completion is analyzed, and the checking process of design indexes under different filling conditions is expounded. The feasibility of the proposed algorithm is verified. The results show that most of the total settlement during the construction period comes from the compressive settlement of the backfill subgrade. When the foundation conditions are good, the total post-construction subsidence mostly comes from the cumulative settlement of the backfill subgrade, and the allowable settlement of the abutment increases, Or longitudinal slope of the relative decline in demand.