基于非饱和渗流理论的排水性基层路面结构排水效果影响因素分析

发布时间：2018-04-14 16:23

本文选题：非饱和渗流 + 排水性基层　；参考：《公路》2014年10期

【摘要】：基于非饱和渗流理论,建立了具有边缘排水系统和排水性基层的高速公路路面结构模型,模拟了降雨及雨后路面结构的排水过程,研究了路堤高度、地下水位及路面裂缝等因素对路面结构排水效果的影响。结果表明路堤高度的降低会加快雨水进入基层以下结构层的速度,明显提高其体积含水量,进而加速内部结构层的损坏;在保证排水层排水通畅的情况下,地下水位对排水效果的影响很小;裂缝的出现对路面结构的排水十分不利。为保证具有边缘排水系统和排水性基层的路面结构的排水效果,建议在保证路面结构的强度及稳定性的条件下,提高路堤高度,设置良好的排水系统并减少路面结构裂缝的出现。
[Abstract]:Based on the theory of unsaturated seepage, the highway pavement structure model with edge drainage system and drainage base is established. The drainage process of the pavement structure after rainfall and rain is simulated, and the height of embankment is studied.The influence of groundwater level and pavement crack on drainage effect of pavement structure.The results show that the reduction of embankment height will accelerate Rain Water's speed of entering the structure layer below the base course, increase its volume water content, and then accelerate the damage of the inner structure layer.The influence of groundwater level on drainage effect is very small, and the occurrence of cracks is very unfavorable to the drainage of pavement structure.In order to ensure the drainage effect of pavement structure with edge drainage system and drainage base, it is suggested to increase the height of embankment under the condition of ensuring the strength and stability of pavement structure.Set up a good drainage system and reduce the appearance of cracks in pavement structure.
【作者单位】：山东大学土建与水利学院;山东高速股份有限公司;
【基金】：国家自然科学基金项目,项目编号51279094、51078222、50708056 山东省自然科学基金项目,项目编号ZR2011EEM012 山东大学自主创新基金项目,项目编号2012HW003
【分类号】：U417.3

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