Research Of Prediction Method For Settlement On The Loess Region High-speed Railway

High speed railway train speed needs the stable basis of the security, the control of high-speed railway settlement is an important foundation for the construction of high speed railway, high speed railway post construction settlement prediction is a new concept put forward with the development of high speed railway. There are no systematic, scientific research in the domestic, so the research on settlement prediction is very necessary. The paper has a study of The loess area of high speed railway subsidence prediction by using prediction method, and put forward in the loess area high speed railway in using two kinds of grey model to predict subsidence prediction, this two kinds of grey model was applied to the actual settlement prediction.Traditional settlement prediction methods mainly include hyperbolic method, Asaoka method, three points and star field method and so on, using the four methods and two kinds of grey model to simulate the high speed railway subgrade post-construction settlement prediction, then analyse the stability and accuracy of six kinds of method, and conclude that the loess area high speed railway subsidence forecast the best prediction method.This article selects the Da (da 'tong) Xi (xi 'an) passenger dedicated line 10 standard 5 sections to study the analysis of project department, in the forecast analysis of selected eight sections, the hyperbola method is the best method of four traditional forecasting methods in terms of accuracy and stability, the proposed two kinds of grey model, the improved grey model to predict the success rate was 100%, and the hyperbolic method and Asaoka method is 90.2% and 90%, and the improved grey models in every way superior to the traditional settlement prediction methods in every way, so the improved grey model is most suitable for the loess area high speed railway subsidence predictionIn this paper briefly introduces the method of high speed railway subgrade construction in Loess Area in the settlement observation and prediction method, is analyzed, the method is suitable for high speed railway in loess area of settlement prediction, hope to provide some reference for the development of high speed railway.