| With further advance of socialist construction in China and implement of the proactive finance policy to expand domestic demand, China has been rapid development of highway construction especially the highway which foundation is soft soil. As the soft soil has characteristics such as high compression, high water content, low strength and water permeability, it is important and necessary to research how to control the stability of Embankment during highway construction period and control its post-construction settlement.This paper researches the settlement of soft ground from the following parts(1) Analysis of mechanism of settlement, component of deformation, deformation features and rules of soft soil in the highway, and make a more in-depth analysis on features, causes, divides and basic process of the settlement of consolidation and secondary consolidation settlement during the process of the settlement. (2) Based on previous research, various methods of settlement prediction has been summarized, the advantages and disadvantages has been evaluated, the applicability has been analyzed, and various kinds of prediction methods based on observed data has been introduced in details.(3) This paper studies the relationship between settlement and time changes, combined with Taylor expansion, and proposes a power polynomial model, and analyzes the feasibility and parameters of the power to determine polynomial method.(4) With an example, this paper select three sections of the soft ground data, using power polynomial model to fit the settlement, and the future settlement was predicted, and analysis results and measured data, exponential curve model and hyperbolic model The results were compared.The research results show that the power-polynomial model of the operation of the soft ground settlement prediction is feasible, it can be a good simulation of sedimentation and predict the settlement rules; According to contrast index curve model and hyperbolic model results, the power of multi- Item type prediction accuracy is higher than the latter two. Research result has effect on the operation of soft soil settlement development law and how to judge whether the stability of embankment deformation, road maintenance and road maintenance and paving. |
