作　　者： ; ; ; ; (路畅）;

机构地区： 东南大学交通学院

出　　处： 《东南大学学报（自然科学版）》 2011年第1期181-185,共5页

摘　　要： 为了研究多年冻土地区路基融沉变形对柔性路面力学性能的影响,采用松铺土和埋设工业冰块2种冻土路基融沉变形模拟方法,修建室内大尺度柔性路面结构试槽并逐层埋设传感器.采用承载板试验方法进行柔性路面面层和基层应力应变检测,通过检测数据的分析得出了融沉变形对柔性路面应力应变的影响规律.结果表明:松铺土测点和埋设工业冰块测点面层与基层层底应变相比正常测点均显著提高,融沉测点面层比正常测点承受了更多的压应力.融沉变形对各层层底应变特别是基层层底应变的非线性特征影响较大,幂函数可以很好地描述其非线性变化规律.研究成果将为冻土地区柔性路面设计提供参考. In order to study the influence of subgrade thawing settlement deformation on the mechanical properties of flexible pavement in permafrost region,two thawing settlement deformation simulation methods of frozen soil subgrade,i.e.loose paving soil and burying industrial ice block,were adopted.Laboratory large-scale experiment tank of flexible pavement structure was built and transducers were buried layer by layer.The stress and strain detection of flexible pavement surface course and base course were carried out by bearing plate test method.Through the analysis of detection data,the influence law of thawing settlement deformation on stress and strain of flexible pavement was obtained.The results show that the bottom strain of surface course and base course of loose paving soil and burying industrial ice block measuring points are both significantly increased compared to the normal measuring points.The surface course of thawing settlement measuring point bears more stress than the surface course of normal measuring point.Thawing settlement deformation has a larger effect on nonlinear characteristics of strain in layers bottom especially bottom of base course.Power function can well describe its nonlinear variation law.The research result will provide a reference for flexible pavement design in permafrost regions.

关 键 词： 融沉变形 柔性基层 沥青路面 应力应变 室内试验

领　　域： [交通运输工程]