Important aspects when modelling the interaction between surface structures and tunnelling in sand

G. Giardina, M. J. DeJong, R. J. Mair

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Tunnelling in urban areas continues to increase and has highlighted the need for a better understanding of the impact of tunnel excavations on existing buildings. This paper considers the influence of surface structures on ground displacements caused by tunnelling in sand through finite element modelling and centrifuge testing. First, the importance of modelling assumptions is evaluated by comparing centrifuge modelling results to finite element modelling results for various soil constitutive models: both a Young's modulus that linearly increases with depth and a power law relation between the soil stiffness and stresses are considered. Second, the most effective soil constitutive model was used to perform a sensitivity study on the effect of different factors governing the structural response. In particular, the effect of the building stiffness and weight on the modification of soil displacements is investigated by introducing a simple surface structure. The use of a no-tension interface between the building and the soil was found to be essential to investigate the effect of weight on gap formation between the soil and the structure, as observed during the experimental tests. Results show the importance of considering the relation between the building weight and the relative stiffness between the building and the soil when assessing the structural response.

Original languageEnglish
Title of host publicationGeotechnical Aspects of Underground Construction in Soft Ground
Subtitle of host publication Proceedings of the 8th Int. Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, TC204 ISSMGE - IS-SEOUL 2014
EditorsC. Yoo, S-W. Park, B. Kim, H. Ban
Place of PublicationLeiden, The Netherlands
PublisherCRC Press
Pages263-268
Number of pages6
ISBN (Print)9781138027008
Publication statusPublished - 2014
Event8th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, TC204 ISSMGE - IS-SEOUL 2014 - Seoul, Korea, Republic of
Duration: 25 Aug 201427 Aug 2014

Conference

Conference8th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, TC204 ISSMGE - IS-SEOUL 2014
CountryKorea, Republic of
CitySeoul
Period25/08/1427/08/14

Fingerprint Dive into the research topics of 'Important aspects when modelling the interaction between surface structures and tunnelling in sand'. Together they form a unique fingerprint.

Cite this