Recurrent neural networks and proper orthogonal decomposition with interval data for real-time predictions of mechanised tunnelling processes

A surrogate modelling strategy for predictions of interval settlement fields in real time during machine driven construction of tunnels, accounting for uncertain geotechnical parameters in terms of intervals, is presented in the paper. Artificial Neural Network and Proper Orthogonal Decomposition ap...

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Bibliographic Details
Published in:Computers & structures 2018-09, Vol.207, p.258-273
Main Authors: Freitag, S., Cao, B.T., Ninić, J., Meschke, G.
Format: Article
Language:English
Subjects:
Artificial neural networks
Boring machines
Computer simulation
Finite element method
Geotechnical engineering
Geotechnology
Interval analysis
Interval arithmetic
Intervals
Mathematical models
Mechanised tunnelling
Neural networks
Parameter uncertainty
Process parameters
Proper Orthogonal Decomposition
Real time
Real-time prediction
Recurrent neural networks
Steering
Surrogate model
Time constant
Tunnel construction
Tunnels
Underground construction
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Summary:A surrogate modelling strategy for predictions of interval settlement fields in real time during machine driven construction of tunnels, accounting for uncertain geotechnical parameters in terms of intervals, is presented in the paper. Artificial Neural Network and Proper Orthogonal Decomposition approaches are combined to approximate and predict tunnelling induced time variant surface settlement fields computed by a process-oriented finite element simulation model. The surrogate models are generated, trained and tested in the design (offline) stage of a tunnel project based on finite element analyses to compute the surface settlements for selected scenarios of the tunnelling process steering parameters taking uncertain geotechnical parameters by means of possible ranges (intervals) into account. The resulting mappings of time constant geotechnical interval parameters and time variant deterministic steering parameters onto the time variant interval settlement field are solved offline by optimisation and online by interval analyses approaches using the midpoint-radius representation of interval data. During the tunnel construction, the surrogate model is designed to be used in real-time to predict interval fields of the surface settlements in each stage of the advancement of the tunnel boring machine for selected realisations of the steering parameters to support the steering decisions of the machine driver.
ISSN:0045-7949
1879-2243
DOI:10.1016/j.compstruc.2017.03.020