Abstract: An excavator machine that includes components such as: a suspended casing having a top end and a bottom end; at least one cable that extends above the casing, where the cable is under tension and has a bottom end that is fastened to the top end of the casing; and a cutter device that is arranged at the bottom end of the casing. The excavator machine further includes: a carriage that is mounted to slide along the cable; a device for moving the carriage along the cable; and a locator device for determining the three-dimensional position of the carriage.

Abstract: 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.

Abstract: The invention relates to an excavator machine (10) comprising: a suspended casing (12) having a top end (14) and a bottom end (16); at least one cable (30, 32, 34, 36) extending above the casing, said cable being under tension and having a bottom end (30a, 32a, 34a, 36a) fastened to the top end of the casing; and a cutter device (18) arranged at the bottom end of the casing. The invention is characterized in that the machine further comprises: a carriage (50) that is mounted to slide along the cable; a device (60, 62) for moving the carriage along the cable; and a locator device for determining the three-dimensional position of the carriage.

Abstract: The present invention relates to a method of making a wall in soil, the method comprising at least the steps consisting in forming a trench in the soil; filling the trench with a self-hardening material; supplying at least one prefabricated element comprising two plates connected together by connection means; and positioning the prefabricated element in the trench filled with the self-hardening material. The invention also provides a wall that can be obtained by this method.

Abstract: The present invention relates to a machine for digging a trench and making a wall in said trench, the machine being suitable for advancing along a path and having rear and front portions relative to the direction of advance of the machine, together with excavator means disposed in the front portion of the machine and defining a substantially vertical cutting front; wall-forming means situated in the rear portion of the machine; and propulsion means suitable for causing the machine to advance along said path. The machine also has a central portion, controllable brake means for slowing advance or blocking at least one portion of the machine, and controllable connection and disconnection means for connecting and disconnecting the central portion respectively with the front and rear portions of the machine, thereby enabling the type of excavator means and the type of wall-forming means to be changed.

Abstract: The invention relates to a soil consolidation process using a combination of calcifying bacteria and denitrifying bacteria. The invention further relates to a composition for carrying out said process.

Abstract: The present invention relates to a machine for digging a trench and making a wall in said trench, the machine being suitable for advancing along a path and having rear and front portions relative to the direction of advance of the machine, together with excavator means disposed in the front portion of the machine and defining a substantially vertical cutting front; wall-forming means situated in the rear portion of the machine; and propulsion means suitable for causing the machine to advance along said path. The machine also has a central portion, controllable brake means for slowing advance or blocking at least one portion of the machine, and controllable connection and disconnection means for connecting and disconnecting the central portion respectively with the front and rear portions of the machine, thereby enabling the type of excavator means and the type of wall-forming means to be changed.

Abstract: A device for determining the position of a moving part, particularly to a device containing a sensor carried by the moving part and designed to supply two out-of-phase signals, each assuming alternately the value 0 or 1 as the sensor is carried in one or the other direction.