高速公路新旧路基拼接处沉降控制施工技术研究

Study on Settlement Control Technology of New and Old Expressway

文中开展了沉降控制施工技术研究,对高速公路旧路基进行基础处理,在新旧路基拼接处安装沉降控制设施,监测并控制拼接处沉降变化,采用机械与人工开挖结合方式,开挖拼接处土方,用分部填筑施工方法,对拼接处进行填筑。结果表明,各观测点所在新旧路基拼接处的沉降量平均值最高不超过3.6 mm,沉降控制效果显著。

This article conducts research on settlement control construction techniques.First,it carries out basic treatment on the old roadbed of the expressway,installing settlement control facilities at the junction of the new and old roadbeds,monitoring and controlling the settlement changes at the junction.The method of combining mechanical and manual excavation is used to excavate the earthwork at the junction,and the method of staged filling construction is applied to fill the junction.The application results show that the average settlement value at the junction of the new and old roadbeds at each observation point does not exceed 3.6 mm,indicating a significant advantage in settlement control effect.