Soletanche Freyssinet

Serge Borel

Daniel Perpezat

Philippe Chagnot

Fabrice Mathieu

Michel Coudry

Jean-François Mosser

Pascal Rodriguez

Jean-Pierre Hamelin

Hedi Sellami

Juan Fernando Uribe

Felipe Gruber

Annette Esnault

Jean Pierre Hamelin

Joël Cano

Ivan Cubillos

Marie Lebreton

Bruno Renoud-Lias

Julien Landrot

The invention relates to the field of excavation systems, and more particularly to excavation systems including tools for excavation by electric pulses. An excavation system of the invention comprises a support frame (), a hydraulic circuit with a pump, and first and second excavation tools. One of said first and second excavation tools is a mechanical excavation tool (') having a hydraulic actuator and a mounting interface with at least one mechanical fastener member and at least one hydraulic coupling in fluid flow communication with said hydraulic actuator, while the other one of said first and second excavation tools is a tool () for excavation by electric pulses, comprising an electricity generator () with a rotary shaft for generating electricity from rotation of the rotary shaft, a hydraulic motor coupled to said rotary shaft to drive rotation of the rotary shaft, and an electronic power module () electrically connected to the electricity generator () in order to be powered by the electricity generator () so as to generate electric pulses of instantaneous power that is higher than an instantaneous power of the electricity generator (), a plurality of electrodes () including at least one electrode () connected to said electronic power module (), the electrodes being arranged on said front face, and a mounting interface () with at least one mechanical fastener member (), and at least one hydraulic coupling () in fluid flow communication with said hydraulic motor (). Each of the mounting interfaces of the first and second excavation tools is suitable for releasably mounting the corresponding excavation tool in alternation under the support frame () of the excavation system, with the corresponding hydraulic coupling in fluid flow communication with said hydraulic circuit of the excavation assembly.

Excavation system with interchangeable tools

The invention relates to a method for consolidating soil by means of calcifying bacteria, said method comprising washing the consolidated soil and recycling the wash water.

Method for consolidating soil

A method for making a wall in soil. The method may include forming a trench in the soil; filling the trench with a self-hardening material; supplying at least one prefabricated element that has two plates connected together by a connection member; and positioning the prefabricated element in the trench filled with the self-hardening material.

Wall formed in soil, the wall including a hollow prefabricated element, and a method of making such a wall

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Rueil Malmaison, France

Serge Borel