Abstract: Process for the electrochemical treatment of a construction comprising a porous medium, a corrodible substance disposed in the porous medium, the construction having electrically conductive properties, comprising the application of an external electrode (3) to a surface (2) of the construction, the external electrode (3) being connected to a terminal of a generator (6), the porous medium being connected to another terminal of the generator (6), and the application of the following four phases at least once: during a first phase lasting between 12 and 360 hours, passing a negative electric current which causes anions to migrate from the porous medium to the external electrode (3) and cations to migrate from the external electrode (3) towards the porous medium, then during a second phase lasting between 2 minutes and 100 hours, interrupting the circulation of the electric current, then during a third phase lasting between 2 minutes and 24 hours, passing a positive electric current, then during a fourth phase la

Abstract: Method of damping the vibrations of at least one pair of stay cables (4a, 4b) of a civil engineering structure (1), in which the stay cables of said pair are linked by a damper (6) having a first stiffness in response to tensile stress and a second stiffness in response to compressive stress, the first stiffness being greater than the second stiffness.

Abstract: Method for the analysis of the thermal behaviour of a structure including an energy-consuming appliance for providing a thermal environment by heating or cooling, the structure being modelled using a thermal model so that a relationship between a theoretical consumption by said appliance and a reference temperature inside the structure satisfies a determined criterion. According to this method, an actual consumption by said appliance, a temperature actually obtained inside the structure and at least one parameter relating to a use of the structure are measured; a variation between the aforesaid relationship and a corresponding relationship between the actual consumption by said appliance and the temperature actually obtained inside the structure are estimated; and when the estimated variation exceeds a threshold, a contribution relating to the use of the structure to said variation is estimated by taking account of said measured parameter.

Abstract: In the method of building a hybrid tower, a metal mast is erected and connected to a foundation and a concrete structure having a plurality of superimposed concrete segments is built around the metal mast by using the metal mast as a support. Afterwards, the metal mast is disconnected from the foundation and lifted by telescoping and guiding the metal mast along concrete structure. Finally, the lifted metal mast is connected to the concrete structure.

Abstract: The invention Mates to a seal unit (4) for providing a seal between two construction elements (1;2). Said seal unit includes a sealing material (5) capable of reversibly deforming and means (6-9) for exerting a controlled compression on the sealing material so as to cause the corresponding deformation of the sealing material, substantially transverse to the compression.

Abstract: The invention provides a method for pulling strands or sub-groups of strands of a multi-strand cable into a conduit (3). In accordance with this method, a strand or sub-group of strands (2) to be pulled into the conduit is conveyed from one end of the conduit to the other by the movement of a drive element (1) in tension, to which the strand or sub-group of strands is temporarily coupled. In addition, the drive element in tension is designed not to enter a bundle of previously installed strands.

Abstract: The invention proposes a system for obtaining information relating to a pipe (4) conveying a flow of fluid (28), and/or relating to the fluid. This system comprises a module (1;30) comprising means (10) of acquiring data, subsequent analysis of which makes it possible to obtain information relating to the pipe and/or the fluid, and means (11) of storing the data which said data acquisition means acquire, the self-contained module being arranged to be pushed by the fluid flow after being introduced into the pipe. It also comprises a mechanical link (2) which is connected to the self-contained module and accessible from outside the pipe.

Abstract: Process for reinforcing a construction structure where, laid on one portion of said structure, is at least one portion of a reinforcement (10) of elongated shape comprising continuous fibers in the longitudinal direction of said reinforcement, which are combined with a polymer matrix, wherein said process comprises a step of removing the polymer matrix in one portion (20) of the reinforcement so as to release the fibers of the reinforcement in order to allow their rearrangement following their release from the polymer matrix. It is thus possible to optimize the binding configuration of the reinforcement with a portion of the structure to be reinforced.

Abstract: The invention provides a method for the transport of a civil engineering structure in an aquatic medium. According to this method: at least one float is associated with the civil engineering structure in such a way as to ensure that the said civil engineering structure floats stably in an aquatic medium, the said float surrounding the civil engineering structure and a bottom portion of the civil engineering structure extending below the said float, and the civil engineering structure and the associated float are caused to move in the aquatic medium to a desired position.

Abstract: The invention proposes a method for improving the stability against vibrations of a stay cable (12) comprising at least one strand (11) housed in a substantially externally smooth sheath (1). In this method, at least one wire (2-3) is spirally wound round the sheath so as to be substantially in contact with said sheath along at least part of the stay cable.

Abstract: A contribution is made to the assembly of a wind turbine intended to comprise, in a final assembly condition, a tower (2) surmounted by a nacelle (4) cooperating with a rotor (5) receiving a plurality of blades (3a-3c). To this end, a temporary association is made between at least some blades from said plurality of blades and the tower, so that said blades extend substantially in the longitudinal direction of the tower.

Abstract: The invention relates to an excavation machine comprising: a mast having a longitudinal direction; a bar presenting a first end provided with an excavation tool; and a carriage movable along the longitudinal direction of the mast and including a first holder member for holding the bar relative to the carriage, said carriage being suitable for moving the bar along the longitudinal direction of the mast. The invention is wherein the first holder member is pivotable relative to the carriage and by the fact that the first holder member presents a locked state in which the bar is prevented from moving in translation relative to the carriage, and an unlocked state in which the bar is free to move in translation relative to the carriage.

Abstract: The invention relates to a device for vibration control of a structure having—two mass bodies (10, 20), each of which is rotatably mounted around a rotational axis (12, 22), wherein both rotational axes extend in the same direction and the center of gravity of each mass body has a spacing (r1, r2) from the associated rotational axis,—a drive that sets each mass body (10, 20) in a circulating rotational motion,—at least one sensor (40), which measures a movement or acceleration of the structure (30), and—a control that, based on the measured movement or acceleration, controls at least one of the following variables:—the rotational angle (?1, ?2) of the rotational movement of at least one mass body (10, 20),—the spacing (a) between the rotational axis (12) of one mass body (10) and the rotational axis (22) of the other mass body (20).

Abstract: The prestressed building structure comprises an assembly of precast elements separated by gaps occupied by an interface product, one or more prestressing sheaths having sections respectively incorporated into the precast elements, and a prestressing tendon tensioned inside the sheath. The sheath sections are respectively fitted with first and second end pieces opening out on the facing surfaces of the two precast elements. The first end piece has a flared opening. An elastic connecting sleeve is connected in a sealed manner to the second end piece. The sleeve presses against the first end piece, which compresses it longitudinally to ensure a seal between the inside of the sheath sections and the gap separating the adjacent surfaces of the two elements.

Abstract: A fluid-cushion supporting arrangement for horizontal conveyance comprises a supporting platform having a center and a distal portion; a flexible angular sealing element arranged under the platform in the region of the distal portion and forming a sealing piston. The sealing piston has a substantially horizontal leg which extends toward the center and forms together with the supporting platform a fluid chamber, and a substantially vertical leg which forms together with the supporting platform a control pressure chamber. The vertical leg is vertically and adjustably inserted in the control pressure chamber. An inlet valve is provided for supplying fluid into the fluid chamber. A pressure-regulating arrangement in fluid communication with the fluid chamber and the control pressure chamber regulates the fluid pressure. The vertical leg comprises a plurality of reinforcement elements including at least one metallic strip.

Abstract: A draining wall includes a plurality of panels filled with a granular filtering material and separated from each other by intermediate elements cast in the ground, a member, embedded in the lower part of each intermediate element, enabling communication to be established between the panels of each pair of adjacent panels, and auxiliary devices applied into contact with the end faces of the intermediate elements so as to cover the mouth of the communication-enabling members. Each auxiliary device is open on the side applied against the intermediate element, has a height greater than the diameter of the mouth, delimits a volume around the mouth, and has either perforations over at least a part of its surface whose size is smaller than that of the granules constituting the filtering material or an opening to which a perforated pipe acting as a receiver is connected.

Abstract: A draining wall comprises a plurality of elementary panels (P) filled with a filtering material (10), wherein the panels are separated from one another by intermediate elements (J) and in that an element (2) connecting each pair of adjacent panels is embedded in the lower part of each intermediate element. The application also discloses a method and an element for its implementation. The invention is particularly useful for landslide areas.

Abstract: A buried fluid storage tank with a single fluid-tight enclosure which comprises an external concrete enclosure buried into the ground, a rigid structure with a bottom slab and possibly a covering dome as well as a fluid-tight heat-insulating envelope which defines inside of the structure a fluid loading space, whereas the external enclosure has the shape of a thick substantially fluid-tight wall, this enclosure as well as the covering dome being made integral with each other from one single piece of material and forming together with the bottom slab the stiffening structure of the tank, the invention being applicable to a confinement tank in particular for a harbor terminal for loading a liquefied natural gas.

Abstract: Impermeabilization and/or consolidation product for soils and building materials, usable by injection, characterized by the fact that it is obtained by mixture of a compound of slag in suspension in water and of a silica liquor having a ratio of SiO.sub.2 Na.sub.2 O lower than 2 and a silica content greater than about 10% by weight.

Abstract: Apparatus for stripping a header from a cast concrete section to which it is adhered adjacent to a site for contiguous concrete section comprising a vertical track in direct association with the header; the track having an opening facing the site; and impact tool adapted to move slidingly within the track to predetermined locations therein; and the impact tool being further adapted to be displaced horizontally within the track to apply a separation force through the track to the header to disrupt adhesion of the header with the concrete.