泡沫混凝土在软基地区高速公路拓宽工程的应用

在既有高速公路的扩建工程中,传统的新老路基的拼接施工方法易出现差异沉降,导致路面及路堤两侧附近的结构物被拉裂破坏,而大大增加公路营运后的维护费用。泡沫混凝土由于具有固化后的自立性、低弹减震性、强度可调节性、耐久性等物理力学特性,能解决新老路基的差异沉降等难题,同时可大大节约土地资源、缩短施工工期。该文结合工程实例,介绍泡沫混凝土在软土地基高速公路拓宽工程中的应用。

Application of Bubble Concrete in Expressway Widening Project in Soft Subgrade Area

In the existing expressway extension projects,the traditional construction method of splicing the old with the new roadbeds is easy to produce the different settlement,which results in the pulling to crack the structures at both sides of pavement and embankment so as to greatly increase the maintenance fund after the highways put into operation. Bubble concrete can resolve the different settlement difficulty of the old and new roadbeds because of having the physical mechanics characteristics of the solidified independence,low-spring damping,adjustable strength,wear and so on,and at the same time able to greatly save the land resource and to shorten the construction period. According to the engineering cases,the article introduces the application of bubble concrete in the soft subgrade expressway widening project.