Combined Model In Tunnel Deformation Prediction

With the constantly rapid development of China’s highway construction, the number ofhighway tunnel project is increasing rapidly. Since our Highway enterprise is booming in recentyears, the highway tunnels are being repaired longer and wider as well. Accompanied by theadvancement of highway tunnel’s technology in varied respects, it is even more gratifying thatsome of the achievements have reached the first tier level in the world. Of course, during theprocess of such a large-scale tunnel construction, a series of problems caused by the complexityof geological structure system has also led to many accidents, which had a very severe impact onthe normal operation of the tunnel. In order to reduce accident hazards, safety monitoring is themost effective way, which ensures the safety of the tunnel construction and operations.The essay, with engineering examples, did some research on the deformation prediction andanalysis of the method and its main contents are as follows:1. The basic concepts and nature of the gray system theory are introduced and modelingrequirements, applicable conditions as well as the method to improve the accuracy of the modelare discussed. Detailed description is introduced of the gray GM (1,1) modeling predictions of themodel and timing model. Through the analysis of specific examples of projects, it compares theprediction accuracy between a single model and a combination model.2. Systematically summarizes the features and functions of the MATLAB language, andgives a rough introduction of part of MATLAB applications in surveying and mapping.Respectively, from the pre-processing of deformation monitoring data, deformation analysis anddeformation visualization specify, MATLAB facilitates the analysis of sophisticated data sets.3. On the background of a highway tunnel project, the original observation data ofsettlement is transferred into raw data of modeling. On this basis, gray models and timing modelsare separately established. It analyses and discusses some related issues on the combinationmodel. Through massive calculations, it explores the suitable combination of tunnel deformationprediction model. By giving its calculation principles and formulas and engineering case study, itexplains the advantages and disadvantages of the use of a combination of model examples.4. It elaborates the application of MATLAB during deformation analysis. By takingadvantage of the MATLAB strong engineering computing power, the gray timing combinationforecasting model has been prepared to predict deformation calculation program of engineeringexamples.Through this research, established two kinds of combination model achieved satisfactoryresults. Prospect of tunnel deformation analysis and prediction and development orientation of research approaches, and made a number of recommendations, provides the basis for futureresearch in the field.