Piecewise-linear modeling of combined vacuum and surcharge preloading at the second bangkok international airport

Keith Doyle, Tong Qiu

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

Abstract

Vacuum preloading is a common method to improve soft, fine-grained soil. While traditional surcharge preloading increases effective stress by increasing total stress, vacuum preloading increases effective stress by reducing pore pressure. This reduces the risk of shear failure, which can be a concern when using surcharge preloading on very weak soil. This paper presents a numerical model for large strain consolidation under combined vacuum and surcharge preloading. The model is based on a readily available radial consolidation model, known as RCS1, which is able to account for vertical and radial flow, soil self-weight, unload/reload effects, time-dependent loading, hydraulic conductivity anisotropy, soil smear, and partial prefabricated vertical drain (PVD) penetration. Additional capabilities of vacuum-induced consolidation are added to the original RCS1 to consider combined vacuum and surcharge loading. The developed model is utilized to simulate a well-published case history of combined vacuum and surcharge preloading at the Second Bangkok International Airport. Good agreement is observed between the simulated and recorded settlement vs. time and excess pore pressure versus time.

Original languageEnglish (US)
Title of host publicationAdvances in Transportation Geotechnics and Materials for Sustainable Infrastructure - Selected Papers from the Proceedings of the Geo-Hubei 2014 International Conference on Sustainable Infrastructure
PublisherAmerican Society of Civil Engineers (ASCE)
Pages122-130
Number of pages9
Edition250 GSP
ISBN (Print)9780784478509
DOIs
Publication statusPublished - Jan 1 2014
EventGeo-Hubei 2014 International Conference on Sustainable Infrastructure: Advances in Transportation Geotechnics and Materials for Sustainable Infrastructure - Yichang, Hubei, China
Duration: Jul 20 2014Jul 22 2014

Publication series

NameGeotechnical Special Publication
Number250 GSP
ISSN (Print)0895-0563

Other

OtherGeo-Hubei 2014 International Conference on Sustainable Infrastructure: Advances in Transportation Geotechnics and Materials for Sustainable Infrastructure
CountryChina
CityYichang, Hubei
Period7/20/147/22/14

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All Science Journal Classification (ASJC) codes

  • Architecture
  • Civil and Structural Engineering
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

Cite this

Doyle, K., & Qiu, T. (2014). Piecewise-linear modeling of combined vacuum and surcharge preloading at the second bangkok international airport. In Advances in Transportation Geotechnics and Materials for Sustainable Infrastructure - Selected Papers from the Proceedings of the Geo-Hubei 2014 International Conference on Sustainable Infrastructure (250 GSP ed., pp. 122-130). (Geotechnical Special Publication; No. 250 GSP). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784478509.0016