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赣中红砂岩填料路基动态模量现场影响因素研究

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Keywords: 道路工程,动态模量,PFWD,红砂岩,黏土矿物,含水率,压实度

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Abstract:

掌握红砂岩填料路基动态模量的现场变化规律,通过现场便携式落锤式弯沉仪(PFWD)试验、室内粉晶X射线衍射(XRD)试验和现场压实度试验,分析了不同黏土矿物含量、含水率和压实度对红砂岩填料路基动弹性弹模量的影响。结合现场检测数据,建立了动态模量随压实度和含水率变化以及动态模量随黏土矿物含量、含水率和压实度变化的试验回归模型。研究表明现场的红砂岩填料路基动态模量与压实度具有良好的正相关回归关系。成型路基的含水率普遍比施工时高。红砂岩填料路基的动态模量随含水率增大而减小,二者具有良好的回归关系。XRD试验显示动态模量随黏土矿物含量的增大而减小,二者也具有良好的回归关系。此外,不但动态模量与压实度、稠度这2个指标具有良好的回归关系,而且动态模量与压实度、稠度、黏土矿物含量3个指标也均具有良好的回归关系。

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