半填半挖路基对路面结构响应的影响研究

Influence of Half-filled and Half-dug Subgrade on Pavement Structure

针对半填半挖式路基对柔性路面和半刚性路面结构的影响,文章建立了平面应变有限元响应模型,研究了不同差异沉降下路面结构的附加应力分布情况,建议使用柔性基层或设置级配碎石底基层以减小基层层底的附加应力;对于半刚性基层沥青路面,建议减小基层的厚度和模量。

This paper established plane strain finite element model according to the influence of half-fill and half-dug subgrade on asphalt pavement with semi-rigid base and flexible base. Additional stress distribution of pavement structure under differential settlement is analyzed, the flexible base and grading macadam subbase are recommended to reduce additional stress on the top of subgrade, while for semi-rigid base asphalt pavement, the thickness and modulus of base should be reduced.