高速公路拼接加宽路基损坏及处治技术研究.pdf

学兔兔 第37卷，第4期 公 路 工 程 Vo1．37，No．4 2 0 1 2年 8月 Highway Engineering Aug．，20 1 2 高速公路拼接加宽路基损坏及处治技术研究 黄国华，吕贵宾 (中国水电建设集团路桥工程有限公司，北京 100048) [摘 要】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。 [关键词】高速公路改扩建；路基拼接加宽；新旧路基；沉降 [中图分类号】u 418．8 [文献标识码]A [文章编号】1674一o61o(2012)04—0231—04 Study on Subgrade Distress and Treatment Techniques of Expressway Splicing Widening HUANG Guohua．LV Guibin (Sinohydro road bridge engineering CO．，LTD，Beijing 1 00048，China) [Abstract]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 recon- struction，the mechanism of distresses of subgrade，retaining structure and pavement in subgade splicing widening engineering is studied in this paper．And the treatment techniques of these distresses are ana- lyzed in detail at the stages of design，construction and maintenance．The study may be used for refer— ence for the subgrade design and the selection of treatments in expressway widening engineering in the fu- ture． [Key words]expressway reconstruction；subgrade splicing widening；the new and old subgrades； settlement 我国高速公路经历了起步建设一探索前进一曲 1 路基加宽方式的选择 折发展一改革提高一快速增长一飞速发展六个阶 段…。尽管其建设发展时间