软弱地基上旧路加宽的路基综合处治设计

Design of Comprehensive Treatment of Subgrade of Old Road Widening on Weak Subgrade

软弱地基上旧路加宽主要的技术难题是如何减小新老路基之间的差异沉降,并保证新老路基的有效衔接,避免道路通车后路面出现纵、横向裂缝等病害。该文介绍广州番禺区 S362 线沙湾至紫坭段加宽工程的路基综合处治设计,着重论述软弱地基处治、新老路基结合部位处理的方法,为珠江三角洲及其他旧路加宽工程提供借鉴。

The main difficult problem in technical of old road widening on weak subgrade is how to reduce the different settlement between new subgrade and old subgrade and how to ensure the effective connection of the new subgrade and the old subgrade so as to avoid the diseases such as longitudinal and transverse cracks etc. at the pavement after road traffic opening. The paper introduces the design of comprehensive treatment of subgrade of widening project of S362 Road from Shawan to Zhini Sector in Fanyu District in Guangzhou City and it mainly states the treatment method of weak subgrade treatment, the location where the new subgrade and the old subgrade are combined so as to provide the widening project of the Zhujiang River Delta and other old road for reference.