In order to improve the traffic capacity of expressways, it is necessary to widen the roadbed and road surface by using unreasonable methods. This paper proposes a method to avoid uneven settlement and cracks on the pavement due to the softness of the old and new roadbeds during the process of widening. Through the reconstruction and expansion, the sustainable development of transportation is realized.%为提高高速公路的通行能力,需要通过选用不同的方式对路基、路面进行加宽.提出了避免拼宽过程中由于新旧路基连接土质松软造成不均匀沉降和路面产生裂缝的方法,通过改扩建施工,实现了交通运输的可持续发展.
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