Location
Arlington, Virginia
Date
14 Aug 2008, 2:15pm - 4:00pm
Abstract
Settlements remain the major concern during the construction and along the life of a roadway embankment built over soft soils. A foundation ground reinforced by a system of rigid piles is an effective solution; it reduces and homogenizes the surface settlements. Rigid piles reinforcement system has been strongly developed in France for the last fifteen years, however, confrontations of several design used methods highlighted important variations in results. This results in implementing a French National Research Project A.S.I.RI. (Grounds Improvement by Rigid Inclusions) gathering construction companies, engineering and design departments, universities and research centers. This project aims to propose guidelines for the design, and the construction of reinforced soils by rigid inclusions. After a short presentation of the technique, this article is devoted to two French case studies of ground improvement by rigid piles, the Senette’s street and the Ramp of Glain examples. In both cases a roadway embankment is intended to be supported by soft soil. The compressible soils are soft sandy clay from alluvial origin. The performance of the embankment supporting system is assessed based on monitoring data obtained from various instruments installed during construction including settlement cells, inclinometers, piezometers, total stress cells and Geodetect settlement strip. The study was made with finite differences and finite elements numerical tools. Some analytical methods are used. A confrontation between experimental, analytical and numerical results is then presented.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
6th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2008 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Nuñez, M.; Dias, D.; Kastner, R.; and Poilpré, C., "Soft Ground Improved by Rigid Vertical Piles. Experimental and Numerical Study of Two Real Cases in France" (2008). International Conference on Case Histories in Geotechnical Engineering. 40.
https://scholarsmine.mst.edu/icchge/6icchge/session07/40
Soft Ground Improved by Rigid Vertical Piles. Experimental and Numerical Study of Two Real Cases in France
Arlington, Virginia
Settlements remain the major concern during the construction and along the life of a roadway embankment built over soft soils. A foundation ground reinforced by a system of rigid piles is an effective solution; it reduces and homogenizes the surface settlements. Rigid piles reinforcement system has been strongly developed in France for the last fifteen years, however, confrontations of several design used methods highlighted important variations in results. This results in implementing a French National Research Project A.S.I.RI. (Grounds Improvement by Rigid Inclusions) gathering construction companies, engineering and design departments, universities and research centers. This project aims to propose guidelines for the design, and the construction of reinforced soils by rigid inclusions. After a short presentation of the technique, this article is devoted to two French case studies of ground improvement by rigid piles, the Senette’s street and the Ramp of Glain examples. In both cases a roadway embankment is intended to be supported by soft soil. The compressible soils are soft sandy clay from alluvial origin. The performance of the embankment supporting system is assessed based on monitoring data obtained from various instruments installed during construction including settlement cells, inclinometers, piezometers, total stress cells and Geodetect settlement strip. The study was made with finite differences and finite elements numerical tools. Some analytical methods are used. A confrontation between experimental, analytical and numerical results is then presented.
