结合参加实施的“四改二”项目思茅至江城二级公路建设,探讨由四级公路改建二级公路沿老路展线出现大量拼宽路基,如何通过施工工艺、处治措施、技术管理等方法,减小新拼宽路基的沉降量,缩小新老路基的沉降差;同时加强新老路基的拼接,保证拼宽路基填筑施工质量,减小新老路基性质差异产生的危害。 In connection with the construction of the Simao-Jiangcheng Grade-II Highway under the “Four-for-Two” project involved in the implementation, a large number of embankment embankments along the old road showline will be explored on the reconstruction of Grade-four highways and how to pass construction techniques, treatment measures and technical management This method can reduce the settlement of new embankment and narrow the settlement difference of new and old embankment. At the same time, strengthen the splicing of old and new embankment to ensure the construction quality of filled embankment and reduce the harm caused by the difference of new and old embankment.