Prediction method of surface deformation due to construction based on least square support vector machine

Abstract

The invention relates to a prediction method of surface deformation due to construction based on a least square support vector machine. The prediction method includes the following processing steps: (1), collecting surface deformation sample data needed for prediction due to shield construction; (2), building a training sample set and a testing sample set; (3), building a surface deformation prediction model based on the least square support vector; and (4), inputting the stratum parameter and the shield tunneling working parameter and conducting surface deformation prediction. The prediction method of surface deformation realizes surface deformation intelligent prediction which can consider the shield tunneling parameters through little sample data, and is low in calculation cost, high in efficiency and applicable to rapid prediction of the surface deformation due to new-building shield tunnel construction with little sample data.

Description

【Technical field】 [0001] The invention relates to a prediction method for shield tunneling construction, in particular to a prediction method for surface deformation caused by construction based on a least square support vector machine, and belongs to the technical field of underground construction engineering. 【Background technique】 [0002] Surface deformation (maximum deformation and settlement trough width) caused by subway tunnel construction is the core content of urban environmental impact control, and has always been a hot issue in the field of tunnel and underground engineering research. In recent years, with the rapid development of subway projects in urban central areas and the wide application of shield tunneling technology, the prediction of surface deformation caused by shield tunneling has attracted widespread attention at home and abroad. [0003] Numerical methods (finite element method, finite difference method, discrete element method, particle flow method...

AI Technical Summary

Problems solved by technology

However, the current research has made many simplifications and assumptions on the technical characteristics of shield tunneling. The surface deformation prediction method either involves too many theoretical parameters, and the engineering application effect is poor, or it is too simplified and cannot directly reflect the shield tunneling parameters. Influence, theory and practice require surface deformation prediction and analysis methods that can directly reflect the influence of shield tunneling parameters

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