山区高速公路改扩建路基拓宽沉降控制标准研究

Research on Standards for Settlement Control of Roadbed Widening in Mountain Highway Reconstruction and Expansion

经济的快速发展需要以更方便快捷的交通为支撑,为了满足交通需求的不断增长,最有效的方式就是对现有高速公路进行改扩建。本文依托某山区高速公路改扩建实际工程,建立路基拓宽差异沉降路面有限元计算模型,综合考虑公路通车运营后路面材料的抗拉强度和疲劳特性,以变坡率0.10%和0.35%作为差异沉降控制标准的下界和上界,将路基差异沉降控制标准分为轻微、低、中、高四个等级,为山区高速公路改扩建工程路基拓宽工程的设计和施工提供理论依据。

The rapid development of economy needs to be supported by more convenient and faster transportation,and the most effective way to meet the growing traffic demand is to modify and expand the existing highway.This paper combines the actual project of a mountainous highway reconstruction and expansion,establishes the finite element calculation model of roadbed widening differential settlement control,takes into account the tensile strength and fatigue characteristics of the pavement material after the highway is opened for operation,takes the variable slope rate of 0.10%and 0.35%as the lower and upper bound of the differential settlement control standard,and divides the roadbed differential settlement control standard into four levels:slight,low,medium and high.It provides a theoretical basis for the design and construction of the roadbed widening project of the highway reconstruction and expansion project.