Research on Settlement Monitoring and Prediction of Soft Soil Roadbeds on Highways
In the construction process of expressway soft soil subgrade section,due to the influence of geological conditions,the road construc-tion has been seriously hindered.In this paper,combined with a soft soil subgrade settlement deformation prediction analysis,mainly using hy-perbolic method and"s"curve method to fit the settlement deformation.The results show that the preloading time is not less than 3 months in order to ensure that the soft soil subgrade has sufficient preloading time under all road loads;S curve can adjust the value of R to reduce the prediction error;The hyperbolic method is used to predict the settlement.The measured settlement time has a great influence on the prediction results.The measured settlement time must exceed the reverse bending point of the settlement process line,otherwise the reasonable prediction results can not be obtained.
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