Abstract: A bridge of the cable-stay type, in particular of a very large span, the deck of which is supported by stays deflected by passing over towers (21). Some of the stays (22) are anchored on the deck at two points of the deck situated on either side of a same tower (21), and the central part of a span between two towers is supported exclusively by other stays (25) which, after having been deflected at the top of a tower, are each anchored in an anchor block (26). The tensile stress to which the central part of the deck is subjected under the effect of these stays (25) directed towards the tops of the two towers situated on either side of the span is compensated for by an axial compressive prestress.

Abstract: Station on a railway or similar line, situated on a viaduct consisting of a carrying structure which comprises a running deck (3) stiffened by longitudinal (4), vertical or oblique ribs placed beneath the deck, the carrying structure resting on supports such as piers (1), the station comprising at least one platform element (6) placed along the carrying structure at a level above that of the running deck. The platform element (6) is supported by at least one sustaining piece (10) which on the one hand is connected to the deck by rods or cables (14) which are transverse, horizontal or slightly inclined to the horizontal, and which resist traction, and on the other hand bears on an abutment (13) carried by the closest longitudinal rib.

Abstract: A bridge, the deck of which comprises two superimposed frames (4,5) each serving as a roadway. These frames are connected by diagonal connecting girders (6) slanting both relative to the vertical and relative to the length of the bridge and joining the edges of the upper and lower frames, and auxiliary connecting girders (7) situated in vertical planes passing through the edges of the lower frame. The prestressing cables (17) of a diagonal girder (6) are anchored to the edge of the upper frame, pass transversely through the lower frame, and then through the diagonal girder which is symmetrical therewith relative to the longitudinal vertical plane of symmetry of the bridge, and are anchored on the opposite edge of the upper frame.

Abstract: A method of constructing the approach and main spans of a cable stayed segmental bridge as the main span is constructed as a smooth continuation of the approach spans without the need for special equipment or different box girder deck sections. The approach spans are constructed each in succession from opposite sides of the main span after which the main span continues from opposite sides toward a midpoint, while the cable stays are installed. For a two-wide box girder bridge, delta frames interconnect side-by-side box girders at the anchor locations of the cable stays for thereby transferring the static and dynamic loads of the main span toward the center plane of support of the cable stays.

Abstract: Precast concrete hollow box girders of a two-wide cable stayed segmental bridge are provided as having inner side slabs of connected girder pairs acting to transfer loads of the box girder pairs to a central location thereof at which they are supported by cable stays.

Abstract: A cable stayed bridge construction having box edge beams to which the deck structure is joined between the top and bottom thereof, and to which the cable stays are anchored.

Abstract: A cable stayed bridge is constructed as having approach deck spans and at least one cable stayed deck bridge section assembled as a unit by employing the deck surfaces of the approach spans as in situ work surfaces for erecting equal deck lengths of the unit. A bridge pylon is supported on a floatable support and extends through an open gap provided in an approach span deck, and cable stays are extended from the pylon for supporting the deck lengths. The completed unit is moved away from the work surfaces and into alignment with a last of the approach spans, and is permanently anchored in place.

Abstract: A concrete deck truss bridge and method of constructing same employing precast compression and tension diagonals with the latter having oppositely extending feet at opposite ends so as to define therein surfaces for support of the intervening compression diagonals, and opposite sides of the feet defining anchor blocks for post-tension tendons. Construction proceeds from main span piers toward the mid-span and end span piers under balanced loading, in sequence.

Abstract: A concreting rig for use in construction by the cantilever method of an elevated, elongated civil engineering work, such as a bridge, elevated road, roof or the like, by in situ concreting longitudinally consecutive sections of the work with the rig overhanging beyond the already completed portion of the work, comprises a rigid structural frame which is longitudinally pressed against the already completed portion of the work, by means of tensioned prestressing members. The rig bears on the already completed work portion by way of at least three abutment devices each of which engages with a complementarily-shaped locating print in the completed work portion, means being provided for predetermining the position of each locating print in dependence upon the geometric characteristics of the work and the position therein, of the section to be concreted.