软土地基路基不均匀沉降引起路面结构附加应力

以解析解表达式为基础详细分析了不同沉降量和路面结构参数对路面结构附加应力的影响。沥青面层的厚度增大 ,面层底面的附加压应力近线性减小 ,而基层底面和底基层底面附加拉应力却近线性增大 ;随着基层厚度和底基层厚度的增加 ,路面各结构层附加应力都呈线性增大。沥青面层模量和底基层模量对面层底面的附加应力影响明显 ,而基层模量影响不太明显 ;基层底面及底基层底面附加拉应力随着各层模量的增加呈线性增大 ,沥青面层模量及底基层模量对层间剪应力影响尤其明显。

Additional stress in pavement structure due to asymmetrical settlement of soft subgrade

Based on analytical express,the influence of varying settlement and varying pavement's parameter to additional stress of pavement were analyzed.The results indicate that the influence of asymmetrical settlement to additional stress of pavement is obvious.With the thickness of asphalt layer increased,the additional stress at the bottom of surface layer is approximately linear decreased,but the additional stresses at the bottom of base and subbase are approximately linear increased.With the thickness of base and subbase increased,the additional stresses of every layer of pavement structure are linear increased.The additional stresses are obviously affected by the modulus of asphalt layer and subbase except the modulus of base,the additional stresses of base and subbase are linear increased with the modulus of pavement structure increased.The shear stress is obviously affected by the modulus of asphalt concrete and subbase.