Vibrations engendrées par le compactage dynamique

La méthode d'amélioration des sols par compactage dynamique repose sur la transmission de chocs de forte energie au terrain, chocs qui vont aussi engendrer des vibrations aux ouvrages éventuellement avoisinants. Par analyse de mesures effectuées sur un certain nombre de chantiers, cet article met en évidence des lois d'atténuation de ces vibrations, permettant ainsi d'estimer à l'avance le niveau de sollicitation des ouvrages situés à proximité de la zone à compacter

RECOMMENDATIONS FOR THE DESIGN, CALCULATION, CONSTRUCTION AND QUALITY CONTROL OF STONE COLUMNS UNDER BUILDINGS AND SENSITIVE STRUCTURES

Foreword: This report is a new and revised version of the recommendations published in the RFG No. 111 in 2005. It takes into account both the experimental results and observations of the French "Union Syndicale Géotechnique" (USG) in the interest of better understanding soil-structure interactions. This version also includes chapters on design based on laboratory and cone penetration tests (CPT). It presents the guidelines to be followed by all building contractors in France (according to Article R111-40 of the French Building and Residential Construction Rules) and oversight entities dealing with the design, calculation, installation and quality control of stone columns and their interaction with buildings and settlementsensitive structures. The following participated in drafting this document: P. Aguado (Apave) P. Berthelot (Bureau Veritas) L. Carpinteiro (Socotec) F. Durand (Fugro Geotechnique) M. Glandy (Soletanche Bachy Pieux) P. Liausu (Menard) B. Pezot (Menard) C. Poilpre (consultant) S. Lambert (Keller Fondations Speciales) J. P. Volcke (Franki Fondation) G. Billoet (Keller Fondations Spéciales) and J. R. Gauthey (Spie Fondations) also participated in discussions. This document has been approved by the Union Syndicale Géotechnique (USG, the French geotechnical union association) and the Comité Français de Mécanique des Sols (CFMS, the French society for soil mechanics, ISSMGE member society)