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公路双侧拓宽差异沉降控制标准研究

, PP. 15-20

Keywords: 道路工程,差异沉降控制标准,有限元模型,双侧拓宽路基,路面结构

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Abstract:

建立了能够考虑路面、路基和地基相互作用的弹塑性有限元整体分析模型,通过路面结构在工后差异沉降下的力学响应分析,提出了高速公路双侧拓宽工程差异沉降控制标准,分析了差异沉降曲线形态、面层和基层厚度对差异沉降控制标准的影响。研究表明差异沉降曲线呈马鞍形分布时,拓宽路基差异沉降控制标准为工后变坡率不超过0.3%;差异沉降曲线呈倒钟形分布时,拓宽路基差异沉降控制标准为工后变坡率不超过0.45%。差异沉降控制标准随面层或基层厚度的增加而减小,保持面层与基层厚度之和不变条件下增加面层或基层厚度,差异沉降控制标准数值不变。

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