Analysis on the Settlement of High-Grade Highway Subgrade in the Yellow River Silted Area and Its Impact on the Safety of the Embankment
In order to evaluate the impact of new road settlement on the safety of the Yellow River embankment,based on the results of road-use silt test in the silted area at the back-side of the Yellow River embankments,this paper put forward the cumulative strain prediction mod-el and the calculation method of the settlement of roadbed in the silted area at the back-side of the Yellow River embankment.By combining the results of internal stress calculation of the roadbed,the calculation and analysis of the settlement of the roadbed in the silted area at the back-side of the Yellow River embankment under cyclic traffic load and settlement during the construction period triggered by the embank-ment filling in the roadbed construction were carried out by using layered sum method.The calculation results show that the settlement devel-ops rapidly in the early stage and has a significant impact on the embankment,which is mainly concentrated in the upper 50 cm of the em-bankment.The settlement and embankment safety are significantly affected by axle load and overloading,followed by vehicle flow,and less affected by embankment height and groundwater level.When the embankment height increases by 1 m,the settlement during the construction period increases by about 50 mm.The total settlement of subgrade increases with the increase of truck weight,embankment height,vehicle flow,overloading multiple and groundwater level,and the post-construction settlement ratio increases with the increase of axle weight,over-loading multiple and vehicle flow,but decreases with the increase of embankment height,and the relationship is approximately in reverse proportion.In order to ensure the safety of the embankment,the axle load,overload and vehicle flow should be controlled in the silted road section.
silted area in the back-side of the Yellow River embankmentcumulative settlementcyclic loadingsilt subgradeembankment safety
万方数据
维普
