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高速公路加宽工程加筋路堤离心模型试验及数值模拟

Keywords: 道路工程,加宽,离心模型试验,数值模拟,加筋路堤

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Abstract:

利用离心模型研究了软土地基上高速公路加宽中筋材拉应变和新老路堤变形特性。离心模型试验结果表明,土工格网铺设在软基和路堤之间比铺设在加宽路堤中部加筋效果显著,同时加筋可以降低加宽路堤的差异沉降。为较为全面分析加宽工程加筋路堤性状,采用大型有限元软件ABAQUS对离心模型试验进行了数值模拟。数值模拟和离心模型试验结果具有良好的一致性。同时,采用有限元方法对加筋效果进行了进一步的分析,结果表明,加筋可以限制加宽路堤横向变形;建议新路堤加两层筋,一层在底部,一层在中部,以限制路堤的位移,提高整体稳定性,并应嵌入老路一定长度。

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