江北滨江大道路堤结合工程试验段沉降与控制研究

南京江北滨江大道工程路基为高填方吹填砂路基,属于"堤路"结合工程。本文主要研究新填路基对老堤的影响以及新老堤的差异沉降控制指标。论文首先根据工程的特点,选取典型工程路段作为试验路段,并选取两个断面,对路基填筑过程中的沉降变形进行了监测;其次,根据地质情况对路基的沉降变形分别采用压缩系数法、三点法和有限元法进行了计算校核,通过对计算结果与现场监测结果进行对比分析,验证并完善了高填方吹砂路基的软土地基处理设计,从而确定合理的施工工艺,指导工程施工。

Study on subsidence and control of the test section with combination of embankment and road at Binjiang Avenue

The subgrade of Binjiang Avenue in Nanjing is designed as sand roadbed, and the project is the combination of the embankment the high filling and hydraulic fill and road. The effect of the new embankment to the old dikes and the indices of the differential settlement control between the new and old embankment are studied. Based on the feature of this engineering, a typical road section is selected as the test section, and the settlement deformation in the process of the roadbed filling is monitored. According to the geological conditions, the settlement deformation of the roadbed is checked by using the method of compression coefficient, the three point method and the finite element method. The comparison analysis of the calculation results with the results from the field monitoring is carried out, and the soft subgrade design is verified and improved, so that the appropriate working procedures to guide the construction could be determined.