改扩建公路新旧路基路面结合处施工技术

Construction Technology for the Joint of New and Old Roadbeds and Pavements in the Reconstruction and Expansion of Highways

随着交通量的持续增加,我国现有的高速公路目前已给予饱和状态,随着地方经济的持续发展,交通量增加,地方国省干线道路严重影响着地方经济持续高效发展,现迫切需要进行必要的改造和扩建来满足当下和未来的需求。但如果改造和扩建的路基拼接效果不佳,会导致沉降差异,严重时会出现路面开裂现象,给行车安全带来了风险。本文以贵州铜仁市普通国省干线建养一体化G211沿河黑獭至印江县城段公路改扩建项目为实例,提出了新旧路基拼接方案,并就新老路基增压补强处理措施展开了研究,通过新旧路基沉降实时监测数据反映,新旧路基拼接施工性能表现优异,衔接效果理想。

With the continuous increase in traffic volume,the existing highways in China have reached saturation.With the continuous development of local economy and the increase in traffic volume,local national and provincial trunk roads seriously affect the sustainable and efficient development of local economy.It is urgent to carry out necessary renovation and expansion to meet current and future needs.But if the joint effect of the renovated and expanded roadbed is not good,it will lead to settlement differences,and in severe cases,road cracking may occur,posing a risk to driving safety.This article takes the example of the G211 highway renovation and expansion project along the Heihe River in Tongren City,Guizhou Province,which integrates the construction and maintenance of ordinary national and provincial trunk lines.A new and old roadbed splicing scheme is proposed,and the measures for boosting and strengthening the new and old roadbeds are studied.Through real-time monitoring data of new and old roadbed settlement,it is reflected that the construction performance of the new and old roadbed splicing is excellent,and the connection effect is ideal.