Application of the orthogonal design method in geotechnical parameter back analysis for underground structures

The back analysis method has been widely used as an indirect method of determining geotechnical parameters based on field measurements. The number of parameters and their initial values greatly influence the reliability and efficiency of back analysis. Therefore, sensitivity analysis is often employ...

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Veröffentlicht in:Bulletin of engineering geology and the environment Jg. 75; H. 1; S. 239 - 249
Hauptverfasser: Tian, Hongming, Chen, Weizhong, Yang, Diansen, Dai, Yonghao, Yang, Jianping
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2016
Springer Nature B.V
Schlagworte:
Algorithms
Case studies
Design
Design analysis
Design engineering
Design techniques
Dimensional analysis
Earth and Environmental Science
Earth Sciences
Foundations
Geoecology/Natural Processes
Geoengineering
Geological engineering
Geotechnical Engineering & Applied Earth Sciences
Geotechnics
Hydraulics
Nature Conservation
Objective function
Optimization
Original Paper
Penalty function
Rock
Searching
Sensitivity analysis
Underground structures
Orthogonal design method
Nelder–Mead method
Sensitivity analysis
Back analysis
ISSN:1435-9529, 1435-9537
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Zusammenfassung:The back analysis method has been widely used as an indirect method of determining geotechnical parameters based on field measurements. The number of parameters and their initial values greatly influence the reliability and efficiency of back analysis. Therefore, sensitivity analysis is often employed to select high sensitivity parameters that have more greater impact on measured back analysis values. The orthogonal design method was first utilized to select geotechnical parameters for back analysis. The optimized parameter values obtained from an orthogonal design table can be used as the initial back analysis values, so as to avoid optimisation algorithm searching in local parameter spaces. By introducing a penalty function to the objective function, back analysis of the geotechnical parameters is changed into an unconstrained optimisation problem, whereby the Nelder–Mead method can then be employed. To verify the feasibility of the proposed back analysis method, a case study was conducted to determine the rock mass parameters for the Houziyan underground powerhouse complex.
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ISSN:1435-9529
1435-9537
DOI:10.1007/s10064-015-0730-0