路桥过渡段路基工后沉降监测试验研究

发布时间：2018-06-19 06:17

本文选题：路桥过渡段 + 试验研究　；参考：《铁道工程学报》2017年09期

【摘要】：研究目的:台背路基沉降是路桥过渡段差异沉降和桥头跳车的主要原因。为探讨路桥过渡段路基在自重应力和汽车荷载作用下的工后沉降,在兰永一级公路某一路桥过渡段布置单点沉降计对过渡段路基工后沉降进行长期监测,即分别在桥梁台背行车道和路肩位置布置两列沉降计,对路基的沉降及稳定性做长期观测,分析路基沉降随时间和空间的变化规律,从而为公路建设中路桥过渡段沉降研究提供基础数据。研究结论:(1)路肩位置沉降大于行车道位置沉降;(2)路基沉降随时间增加而增大,过渡段路基填筑结束1年后沉降趋于稳定;(3)汽车荷载作用下路基沉降不会出现较大的增长趋势;(4)对数模型能较真实地反映路基工后沉降规律;(5)本研究结论可为路桥过渡段的设计和施工提供指导。
[Abstract]:Research purpose: the settlement of abutment subgrade is the main reason of differential settlement and bridgehead jump. In order to study the post-construction settlement of roadbed in the transition section of the road and bridge under the action of deadweight stress and vehicle load, a single point settlement meter was arranged in the transition section of one way bridge of Lanyong first class highway to carry out long-term monitoring of the post-construction settlement of the subgrade in the transition section. In other words, two series of settlement meters are arranged in the carriageway and shoulder position of the bridge abutment respectively. The settlement and stability of the roadbed are observed for a long time, and the variation law of the subgrade settlement with time and space is analyzed. Thus provides the basic data for the road bridge transition section settlement research in the highway construction. Conclusion: 1) the roadbed settlement is larger than that of the carriageway. (2) the roadbed settlement increases with time. A year after the end of the subgrade filling in the transition section, the settlement tends to stabilize under the action of automobile load. The logarithmic model can reflect the settlement law of the roadbed after construction more truthfully. 5) the conclusion of this study can be used as the road. Guide the design and construction of the bridge transition section.
【作者单位】：兰州理工大学;新加坡国立大学;
【基金】：国家自然科学基金项目(51568044) 兰州理工大学中青年骨干教师出国交流基金项目
【分类号】：U416.1

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