大断面箱涵顶进施工引起路面变形规律研究

Research on the law of road deformation caused by jacking construction of large section box culvert

为保障S439省道顶推大断面矩形箱涵下穿襄荆高速工程的安全顺利实施,运用现场实测、数据分析等方法,对大断面箱涵顶进施工引起路面的变形规律进行了分析与探讨。研究结果表明:路面发生最大隆起位置靠近矩形箱涵轴线,而路面沉降产生最大位移位置偏离轴线位置;已经顺利顶进的箱涵对后续顶进箱涵有一定保护作用,路面变形幅度相对较小,研究成果以期为后续工程建设提供一定的参考。

In order to ensure the safe and smooth implementation of the S439 provincial road pushing large-section rectangular box culvert under the Xiang-Jing Expressway project,using on-site measurement and data analysis methods,the law of road deformation caused by the jacking construction of large-section box culverts was analyzed and discussed.The research results show that the maximum uplift of the road surface is close to the axis of the box culvert,while the maximum displacement due to road subsidence is deviated from the axis position;the box culvert that has been successfully jacked has a certain protective effect on the subsequent jacking of the box culvert,and the amplitude of road deformation is relatively small.The corresponding research results are expected to provide certain guiding significance for later engineering construction.