路基对高速公路早期损坏的影响

Effect of subgrade on the early damage of expressway

针对路基变形引起路面早期破坏的不同形式与成因,以及通过对路基工后沉降、差异沉降率、压缩变形对路基强度、变形影响的分析研究,判定路基变形和强度降低是引起高速公路早期破坏的一个主要方面,从而导致路基抵抗变形能力和综合承载能力下降而出现早期损坏。为此,应在加强路基强度、抗变形能力方面给予高度重视以消除或减轻第一类早期破坏。

In view of different forms of early pavement damage caused by the deformation of subgrade,this article analyzes the effect of the deflection of subgrade after completed,the rate of differential deflection,the compression deformation on the strength of subgrade and its deformation. It is considered that the deformation,the reduction of strength are a major aspect of early damage of expressway,thus resulting in the reduction of the resistance to deformation and the comprehensive capacity.For this reason,attention to upgrading the strength of subgrade,the resistance should be paid to eliminate or release the first type of damage.