Flat Plate Dilatometer and Finite Element Analysis in Evaluation of Settlement Induced Effects on Utilities

ABSTRACTFlat-plate dilatometer (DMT) and ASTM D 2435 consolidation test derived constrained moduli are compared and a utility analysis is performed. For the Northwest Corridor Express Lanes project along I-75 in Georgia, utilities (sewers, water lines, etc.) were expected to be affected by new embankment construction. Because of extensive sample disturbance incurred during sampling and testing of the Piedmont residuum soil, consolidation tests measured low constrained moduli and preliminary settlement estimates predicted large and unrealistic settlements. Additional DMT in situ tests were used to measure the constrained modulus with less disturbance. At critical utility crossings, the proposed embankments were modeled using PLAXIS 2D with soil defined by the DMT constrained modulus profiles. Settlement profiles from these modeled cross-sections were applied to the utilities using an elastic beam approach. The use of the DMT and elastic beam approach confirmed many of the critical utilities would not be damaged, thereby saving construction time and tens of millions of dollars in utility remediation and relocation costs.

• Record URL:
  https://doi.org/10.1061/9780784482124.016
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784482124
• Supplemental Notes:
  • © 2019 American Society of Civil Engineers 2019
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Brancato, Dylan
  • McNulty, E. Gregory
  • Little, Bill
  • Williams, Timothy
• Conference:
  • Eighth International Conference on Case Histories in Geotechnical Engineering (Geo-Congress 2019)
  • Location: Philadelphia Pennsylvania, United States
  • Date: 2019-3-24 to 2019-3-27
• Publication Date: 2019-3

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 145-154
• Monograph Title: Geo-Congress 2019: Geotechnical Materials, Modeling, and Testing

Subject/Index Terms

• TRT Terms: Dilatometers; Embankments; Express lanes; Finite element method; Ground settlement; Public utilities; Road construction; Sewers; Soil consolidation test
• Identifier Terms: Interstate 75
• Geographic Terms: Georgia
• Subject Areas: Construction; Geotechnology; Highways;

Filing Info

• Accession Number: 01702451
• Record Type: Publication
• ISBN: 9780784482124
• Files: TRIS, ASCE
• Created Date: Apr 23 2019 3:19PM