Abstract: A method for producing a reinforced concrete part, having a tensioned portion subjected to pull stresses and tending to stretch under the load, and which includes a reinforcing frame with at least one tensioned longitudinal bar rigidly connected to the concrete by an adhesive connection that determines a tangential adhesive stress along the bar that varies on the basis of applied pull stresses.

Abstract: A reinforcing bar with improved adherence for reinforced concrete component, consists of a metal profile section (1) in the form of a flattened strip of rectangular cross section with two opposite wide faces (10, 10?) on which longitudinally separated projecting anchoring portions are formed.

Abstract: A construction element of reinforced-concrete panel (1) in which is embedded a reinforcement framework includes at least one main framework layer extending along a tensioned outer face (11) of the element (1) and to which an inner framework (3) is attached for securing to the concrete, extending to the thickness of the element (1), the latter being produced, after the placement of the reinforcement framework, by pouring concrete onto a thin continuous wall (2) forming a sacrificial formwork. The thin wall (2) forming the sacrificial formwork extends along the tensioned face (11) of the element (1) and at the same time forms the main framework layer of the element (1), the nature and thickness of the thin wall (2) being determined so as to withstand the tensile stresses generated by the forces applied to the element (1) without the risk of separation from the concrete.

Abstract: A method for producing a reinforced concrete part, having a tensioned portion subjected to pull stresses and tending to stretch under the load, and which includes a reinforcing frame with at least one tensioned longitudinal bar rigidly connected to the concrete by an adhesive connection that determines a tangential adhesive stress along the bar that varies on the basis of applied pull stresses.

Abstract: A construction element of reinforced-concrete panel (1) in which is embedded a reinforcement framework includes at least one main framework layer extending along a tensioned outer face (11) of the element (1) and to which an inner framework (3) is attached for securing to the concrete, extending to the thickness of the element (1), the latter being produced, after the placement of the reinforcement framework, by pouring concrete onto a thin continuous wall (2) forming a sacrificial formwork. The thin wall (2) forming the sacrificial formwork extends along the tensioned face (11) of the element (1) and at the same time forms the main framework layer of the element (1), the nature and thickness of the thin wall (2) being determined so as to withstand the tensile stresses generated by the forces applied to the element (1) without the risk of separation from the concrete.

Abstract: The invention concerns a tank for a fluid product, having a bottom (4) and a resistant side wall (10) composed of juxtaposed prefabricated panels (1) each comprising a wall element (2) covered, on an internal face (22), with a continuous sealing sheet (3) extended by three sections (33, 33?, 34) which cover respectively the lateral sides (23, 23?) and the lower side (24) of the wall element (2) and overlap on the outside of the wall (10). Said panels are placed on a slab (4) covered with a sealing sheet (42) and the adjacent overlapping sections of the sealing sheets (3, 42) covering the set of the panels (1) and the bottom (4) are connected together in a sealed fashion. Such a tank which is easy to build and to maintain, can contain drinking water or a polluting product.

Abstract: The invention concerns a tank for a fluid product, having a bottom (4) and a resistant side wall (10) composed of juxtaposed prefabricated panels (1) each comprising a wall element (2) covered, on an internal face (22), with a continuous sealing sheet (3) extended by three sections (33, 33′, 34) which cover respectively the lateral sides (23, 23′) and the lower side (24) of the wall element (2) and overlap on the outside of the wall (10). Said panels are placed on a slab (4) covered with a sealing sheet (42) and the adjacent overlapping sections of the sealing sheets (3, 42) covering the set of the panels (1) and the bottom (4) are connected together in a sealed fashion.

Abstract: A molded concrete member has two facings, respectively active and passive, spaced from one another by a preselected distance, and between which is embedded a reinforcing cage. The cage has, on either side of a neutral axis, two layers, respectively active and passive, which are separated by a spacing. Each layer has at least one longitudinal solid bar of preselected cross-section, the spacing and the cross-section of the bars being determined in relation to loads to be applied, the two layers are respectively parallel to both facings of the molded element and are connected by transverse linking armoring.

Abstract: The invention relates to a conduit for circulation of fluid comprising a sealed pipe (A) fixed to a rigid supporting body (B) comprising a horizontal base having a lower face bearing on a laying surface (C) and two lateral wings going up vertically along the sites of the lower section of the pipe (A), said supporting body (B) comprising, on either side of the tubular enclosure (A), a single-piece portion (31, 31′) having, as a transversal section, a L-shaped profile comprising a substantially vertical branch (32) forming the wing extending along the corresponding side of the enclosure (A) and a substantially horizontal branch (33) extending beneath the former in order to form at least a portion of the base (3) of the supporting body (B) resting on the ground (C).

Abstract: The invention relates to a conduit for circulation of fluid comprising a sealed pipe (A) fixed to a rigid supporting body (B) comprising a horizontal base having a lower face bearing on a laying surface (C) and two lateral wings going up vertically along the sites of the lower section of the pipe (A), said supporting body (B) comprising, on either side of the tubular enclosure (A), a single-piece portion (31, 31′) having, as a transversal section, a L-shaped profile comprising a substantially vertical branch (32) forming the wing extending along the corresponding side of the enclosure (A) and a substantially horizontal branch (33) extending beneath the former in order to form at least a portion of the base (3) of the supporting body (B) resting on the ground (C).

Abstract: The invention relates to a reinforcing cage for a concrete element (1) comprising at least two layers of longitudinal armorings (C, T) maintained spaced from one another by transverse armorings (E).

Abstract: A conduit for the circulation of fluid under pressure comprising a tubular enclosure delimited by a thin wall and fixed on a rigid base slab of molded material. The upper part of the enclosure comprises, in cross-section, at least three thin wall segments, including two lateral segments each extending from a lower side to an upper side, and at least one upper segment closing the enclosure by connecting the upper sides of the lateral segments. Each lateral thin wall segment is joined to a rigid support element of molded material fixed at its base to the corresponding side of the slab and comprising an inner surface conjugate with that of the lateral segment onto which the latter is applied. The inner surface extends from the level of the upper surface of the slab as to a level sufficient to maintain the rigidity of the lateral segment over its entire height.

Abstract: An elongated enclosure designed to withstand internal pressure which may exceed 10 bars and forming a sealed, fluid-tight tubular space having a truncated transverse section, the enclosure comprising a lower part formed by a rigid concrete slab resting on the ground and an upper part constituted by a thin metal wall in the shape of a curved arch extending between two lateral ends parallel to the longitudinal axis and connected to the slab, each of which is attached by a longitudinal junction piece connected tangentially to the lateral end of the arch.

Abstract: An underground tubular structural system capable of having a very large cross section, for the construction of urban or rural conduits, underground passages and other civil engineering installations. At least two conduits (S1) (S2), namely, a high conduit (S2) and a low conduit (S1), are superposed and at least the high conduit (S2) is formed in cross section by at least two prefabricated elements, namely a lower element (4) (6) in the shape of an inverted U capping the low conduit (S1) and bearing along two lateral sides (14) of the latter and an upper covering element (2') (5) capping the lower element (4) (6) of the high conduit and closing the section (S2) towards the top. One or more supplementary conduits can easily be added to an already existing conduit.

Abstract: A process for the construction of a semi-buried structure for the protection of a subgrade formed on a mountainside, and the structure thus constructed. The structure consists entirely of precast concrete elements forming a succession of adjacent sections, each consisting of three precast elements, respectively an upper covering element bearing, via longitudinal articulations, on two side elements comprising, respectively, a solid wall on the uphill side and at least one pillar on the downhill side, and each provided with a widened footing enabling the element simply to be placed on the ground, and with an upper portion in the form of a stringer on which are formed longitudinal portions for the articulated bearing of the corresponding lateral edge of the covering element. The invention applies, in particular, to the protection of highways or railroad tracks in mountainous locations.

Abstract: A fluid-conveying conduit of large cross section for conveying fluid under high pressure, formed by assembling on a laying surface a plurality of prefabricated longitudinal elements placed in sequence and comprising, in transverse section, a lower base and a vault having two lateral edges connected to the base by sealingly joining longitudinal members. The longitudinal joining members consist of two parallel metallic profiled members rigidly connected to one another by at least one crosspiece and fixed to a slab forming the base of the conduit, and the vault consists of at least one thin wall element and is sealingly fixed by its two lateral edges along two longitudinal profiled members.

Abstract: An underground tubular structural system capable of having a very large cross section, for the construction of urban or rural conduits, underground passages and other civil engineering installations. At least two conduits (S1) (S2), namely a high conduit (S2) and a low conduit (S1), are superposed and at least the high conduit is formed in cross section by at least two prefabricated elements, namely a lower element (4) (6) in the shape of an inverted U capping the low conduit (S1) and bearing along two lateral sides (14) of the latter and an upper covering element (2') (5) capping the lower element (4) (6) of the high conduit and closing the section (S2) towards the top. One or more supplementary conduits can easily be added to an already existing conduit.

Abstract: A fluid-conveying conduit of large cross section, formed by assembling on a laying surface a plurality of prefabricated longitudinal elements placed in sequence and comprising, in transverse section, a lower base and a vault having two lateral edges connected to the base by sealingly joining longitudinal members, which consist of two parallel metallic profiled members rigidly connected to one another by at least one crosspiece and fixed to a slab forming the base of the conduit, and the vault consists of at least one thin wall element and is sealingly fixed by its two lateral edges along two longitudinal profiled members. The invention applies especially to the construction of conduits for conveying fluid under pressure, for example for water conveyance, urban heating or penstocks.

Abstract: A buried conduit consisting, in transverse cross-section, of a lower component (2) and a covering upper component (1) which bears on the upper part of the side walls (22) of the lower component (2) by means of lengthwise bearing members (3). According to the invention, the upper component (1) forms an arched vault made so as to have sufficient flexibility to distort slightly under the effect of the forces to which it is subjected, and the lower component (2) is made so as to resist, without distortion, the forces transmitted by the ground and by the upper component (1), both components being fixed to each other along the lengthwise bearing members (3) and the latter consisting of socket joints, so as to permit the bearing parts of the distortable upper component to pivot without sliding relative to the undistortable lower component.

Abstract: Enclosing structures having tubular sections which are elliptical in cross-section, each section being an assembly of prefabricated components corresponding to a portion of the cross-section of the tubular section and including side components and a vault forming upper component, and optionally a base component, the side components having stabilizing members at their lowermost ends, joints being provided to integrally interconnect the components to form a unitary structure.