Title

Physical and numerical experimental study of stress-strain state of the structure lining of a shallow tunnel

DOI

https://doi.org/10.1201/b17240-36

Document Type

Conference Proceeding

Publication Date

1-1-2014

Publication Title

Geotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 8th Int. Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, TC204 ISSMGE - IS-SEOUL 2014

Abstract

This article refers to research carried out to determine the stress-strain state of the structure lining of a shallow tunnel subjected to an increase of the forces acting on the ground surface, using two different methods and independent, allowing it to compare the results obtained from the magnitude of the maximum stress in the structure and the safety factor for that effort. The Two methods used during the investigation that developed compromise: first, building a physical model in a test tunnel type 1g, which was properly instrumented to record the variables of interest during the test, increased load. The second was developed with a numerical model using the finite element method, which simulated the increase of the forces acting on the ground surface. In particular, the results presented in detail for two points in the section of the lining tunnel: the top or vault and lateral or hastial. The comparison of the results obtained by the two methods conclude that for the present study the result of the maximum value of internal stress in the structure calculated from numerical modeling showed a difference of 1.64 times in excess compared with the record in the physical test. Regarding the analysis of the safety factor FS for maximum overload condition applied it was found that the numerical modeling method exceeds 1.6 times the value obtained in the physical test. © 2014 Korean Geotechnical Society.

First Page

191

Last Page

195

ISBN

9781138027008

Identifier

SCOPUS_ID:84907363566

Documento original

Compartir

COinS