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Probabilistic evaluation of settlement monitoring with the observational method during construction of embankments on clay
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-5372-7519
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-5243-4650
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-9615-4861
2019 (English)In: Proceedings of the 7th International Symposium on Geotechnical Safety and Risk (ISGSR 2019): State-of-the-Practice in Geotechnical Safety and Risk / [ed] Jianye Ching, Dian-Qing Li and Jie Zhang, 2019, article id IS3-3Conference paper, Published paper (Refereed)
Abstract [en]

Preloading  is  commonly  used  to  accelerate  primary  consolidation  and  increase  strength  under  embankments founded on highly compressible clay. By installing prefabricated vertical drains, this process can be even further accelerated. Because of significant geotechnical uncertainties, primarily regarding the vertical and horizontal coefficients of consolidation, prediction of settlement development with time is difficult. This paper shows how Bayesian statistics can be used to update a prior prediction of  the  final  settlement  from  the design  stage, with observations of  settlement made during  the preloading. With  this  approach,  the  observations  during  construction  are  used  to  significantly  reduce  the  considerable  epistemic uncertainty present at the design stage. This allows the surcharge design to be adjusted to suit the actual ground conditions, which is done by increasing the surcharge height if the settlement develops too slowly.

Place, publisher, year, edition, pages
2019. article id IS3-3
Keywords [en]
Observational method; settlement; Bayesian updating; reliability-based design
National Category
Geotechnical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-264902DOI: 10.3850/978-981-11-2725-0_IS3-3-cdISBN: 978-981-11-2725-0 (electronic)OAI: oai:DiVA.org:kth-264902DiVA, id: diva2:1375159
Conference
7th International Symposium on Geotechnical Safety and Risk, Taipei, December 2019
Funder
Swedish Transport Administration
Note

QC 20191209

Available from: 2019-12-04 Created: 2019-12-04 Last updated: 2020-01-13Bibliographically approved

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