随着国民经济的快速发展,道路交通运量迅猛增长。对旧路进行加宽改造,方案设计是决定成败的关键因素。由于旧路基已基本沉降趋于稳定,而新加宽的路基会产生较大的沉降和塑性累计变形。 With the rapid development of the national economy, the volume of road traffic has increased rapidly. To widen the transformation of the old road, the program design is the key factor in determining success or failure. As the old subgrade has been basically subsidence stabilized, while the newly widened subgrade will have a greater settlement and plastic cumulative deformation.