基于疲劳寿命递增的LSPM下面层半刚性路面结构优选

Optimization of Semi-rigid Pavement Structures of LSPM Lower Layer Based on Fatigue Life Increasing

疲劳寿命是影响路面结构耐久性的关键因素,寿命递增的路面结构需在满足路面结构良好的承载力要求下,仅对其表面层进行功能化,从而实现耐久性长寿命沥青路面结构的设计目标。通过理论计算及统计分析,探讨沥青路面结构层的疲劳寿命与结构层参数之间的关系,分析不同因素对大粒径透水沥青混合料路面结构疲劳寿命的影响,提出路面结构疲劳寿命的预估模型;并基于陕西地区的气候交通条件差异,提出陕西不同地区寿命递增的LSPM沥青路面结构组合类型和材料参数。

Fatigue life is a key factor affecting the durability of pavement structure.The pavement structure with increasing life needs to meet the requirements of good bearing capacity of pavement structure and only functionalize its surface layer,so as to achieve the design goal of long-life durability asphalt pavement structure.Through theoretical calculation and statistical analysis,the relationship between fatigue life and structural layer parameters of asphalt pavement structure layer were discussed,and the influence of different factors on the fatigue life of large stone porous asphalt mixes(LSPM)pavement structure was analyzed.The prediction model of pavement structure fatigue life was proposed.Based on the differences of climate and traffic conditions in Shaanxi province,the combination types and material parameters of LSPM asphalt pavement with increasing life in different regions of Shaanxi province were put forward.