摘要
在役高速公路进行拼接拓宽改造后,由于新老路基之间的刚度不同,将不可避免产生差异沉降,如采取的处治措施不当,拓宽后在新旧交接处极易在路面表面产生纵向的反射开裂。论文以京港澳高速公路(石安段)改扩建工程项目为例,结合施工过程中的典型工况,选取典型断面位置,进行了新旧路基沉降观测,并对观测结果采用双曲线法进行分析研究,得到拼宽部分路基沉降变化规律,可为今后的高速公路拼宽施工提供指导经验。
After the splicing and widening of the in-service expressway, the stiffness between the new and old subgrades will be different,and differential settlement will inevitably occur. If the disposal measures are not taken properly, it will be easy to produce vertical reflection cracks on the road surface at the new and old junctions after widening. This paper takes the Beijing-Hong Kong-Macao Expressway Expressway(Shi An Section) reconstruction and expansion project as the background, combined with the typical working conditions in the construction process, selects the typical section location, and carries out the observation of the new and old roadbed settlement. The observation results are analyzed by the hyperbolic method, and the variation law of the subgrade settlement is obtained, which provides a good guiding experience for the future highway widening construction.
作者
韩飞飞
HAN Fei-fei(Hebei Provincial Communication Planning and Design Institute, Shijiazhuang 050091, China;Hebei Ruizhi Transportation Technology Consulting Co. Ltd., Shijiazhuang 050091, China)
出处
《工程建设与设计》
2019年第9期33-35,共3页
Construction & Design for Engineering
关键词
拼宽路基
沉降观测
工后沉降
双曲线
widening the subgrade
settlement observation
post work settlement
hyperbola
