A shallow single plate cold roll formed steel tub girder member is fabricated from unheated steel plate material by a cold roll-forming process which eliminates longitudinal welds and induces camber in the tub girder member.

A longitudinal modular system with boards (3) for underpass bridges for installation of two tracks for railway circulation in which the board (3) is placed between two consecutive piers (4) and comprises a pair of longitudinal beams (1), which themselves comprise a lower wing (2c), for supporting on the piers (4), a core (1b) and an upper wing (1a); and a plurality of transversal slabs (2) that are attached to the lower wings (2c) of the longitudinal beams (1), thus forming a

U-shaped configuration, where the length of the longitudinal beams (1) is essentially similar to the span between two piers (4), and the configuration of the board (3) has a transversal, U-shaped section such that the railway circulates inside said U shape. The invention also describes the method for constructing same.

A precast concrete beam is provided in construction of a long span bridge structure. The beam is formed of a plurality of aligned modular elements each formed of prestressed UHPC mix as a unitary body. The UHPC mix includes discontinuous fibers distributed randomly throughout a concrete matrix. Each modular element is aligned modular and connected by an epoxy grout to adhering adjacent element joints. Finally, post-tensioning of the entire beam reinforces and affixes the plurality of aligned modular elements into a single long span beam.

A precast concrete beam is provided in construction of a long span bridge structure. The beam is formed of a plurality of aligned modular elements each formed of prestressed UHPC mix as a unitary body. The UHPC mix includes discontinuous fibers distributed randomly throughout a concrete matrix. Each modular element is aligned modular and connected by an epoxy grout to adhering adjacent element joints. Finally, post-tensioning of the entire beam reinforces and affixes the plurality of aligned modular elements into a single long span beam.

An elevated roadway for autonomous vehicles may include a pylon extending vertically from a ground anchor and comprising a metal tube defining a central cavity and a concrete column within the central cavity. The elevated roadway further includes a bracket coupled to the pylon and comprising a mounting plate secured to the pylon and a cantilevered road support member extending from the mounting plate. The elevated roadway may further include a cantilevered road section coupled to the pylon via the cantilevered road support member and comprising a joist structure structurally coupled to the cantilevered road support member, a road member above the joist structure and supported by the joist structure, and first and second side barriers along first and second sides of the road member, respectively. The road member may be adapted to receive a four-wheeled roadway vehicle.

A system for construction of double U and single U steel composite structure for bridges and methods thereof are disclosed. The system comprising: a base slab (1), a plurality of top and bottom U shaped beams (2, 8) made of I section, exterior top and bottom slabs (3, 9), a bottom deck slab (4), foot path (5) and kerb (6). In precast scheme U shaped bottom beams (2) are placed at about 2 m interval and exterior slab and bottom deck slab are casted. Top U beams are casted in inverted position. Base slab is provided and bottom U system is placed and top U system is provided over bottom U system forming a full frame vierendeel type composite as a self-straining unit. Earth filling compaction to be done. The approaches are made of single U section and being extended with I beam and RCC slab. Cast in situ scheme is done similar.

A system for construction of double U and single U steel composite structure for bridges and methods thereof are disclosed. The system comprising: a base slab (1), a plurality of top and bottom U shaped beams (2, 8) made of I section, exterior top and bottom slabs (3, 9), a bottom deck slab (4), foot path (5) and kerb (6). In precast scheme U shaped bottom beams (2) are placed at about 2 m interval and exterior slab and bottom deck slab are casted. Top U beams are casted in inverted position. Base slab is provided and bottom U system is placed and top U system is provided over bottom U system forming a full frame vierendeel type composite as a self-straining unit. Earth filling compaction to be done. The approaches are made of single U section and being extended with I beam and RCC slab. Cast in situ scheme is done similar.

The bridge construction system and method according to the present invention provides a lightweight, efficient, economical, long-lasting, and easily implemented composite steel structure that can be filled with concrete in place for the construction of pedestrian and smaller road bridges, specifically those found in rural areas. The bridge construction system of the present invention is unique in that it is a steel-frame reinforced composite bridge with decking and rebar caging that provides a permanent, non-removable form for poured-in-place concrete. The composite nature of the bridge allows for installation of the bridge to take place in one day, while the entire process from site preparation such as grading and excavation to cleanup takes a week or less. The quick installation of the bridge is designed to have a minimally invasive impact on the surrounding environment.

The bridge construction system and method according to the present invention provides a lightweight, efficient, economical, long-lasting, and easily implemented composite steel structure that can be filled with concrete in place for the construction of pedestrian and smaller road bridges, specifically those found in rural areas. The bridge construction system of the present invention is unique in that it is a steel-frame reinforced composite bridge with decking and rebar caging that provides a permanent, non-removable form for poured-in-place concrete. The composite nature of the bridge allows for installation of the bridge to take place in one day, while the entire process from site preparation such as grading and excavation to cleanup takes a week or less. The quick installation of the bridge is designed to have a minimally invasive impact on the surrounding environment.

A system for construction of double U and single U steel composite structure for bridges and methods thereof are disclosed. The system comprising: a base slab (1), a plurality of top and bottom U shaped beams (2, 8) made of I section, exterior top and bottom slabs (3, 9), a bottom deck slab (4), foot path (5) and kerb (6). In precast scheme U shaped bottom beams (2) are placed at about 2 m interval and exterior slab and bottom deck slab are casted. Top U beams are casted in inverted position. Base slab is provided and bottom U system is placed and top U system is provided over bottom U system forming a full frame vierendeel type composite as a self-straining unit. Earth filling compaction to be done. The approaches are made of single U section and being extended with I beam and RCC slab. Cast in situ scheme is done similar.