高速公路拼接加宽路基损坏及处治技术研究

我国早期修建的高速公路已经不能满足交通运输的需求，需要拓宽改造。根据高速公路改扩建现状，对路基拼接加宽过程中出现的路基损坏、支挡结构损坏及路面损坏的成因进行了研究。从改扩建设计、施工及后期养护等阶段人手，对上述损坏类型的处治技术进行了分析。研究成果为今后高速公路改扩建路基设计和相应的处治措施的选择提供参考。

Study on Subgrade Distress and Treatment Techniques of Expressway Splicing Widening

The expressways that constructed at early stage in China must be reconstructed, as most of them could not meet the current traffic demand. Based on the present Situation of expressway reconstruction, the mechanism of distresses of subgrade, retaining structure and pavement in subgads splicing widening engineering is studied in this paper. And the treatment techniques of these distresses are analyzed in detail at the stages of design, construction and maintenance. The study may be used for reference for the subgrade design and the selection of treatments in expressway widening engineering in the future.