A method for building a bridge, said bridge (4) comprising piers (6) and at least one deck (8), the method comprising: a cantilever step, wherein a girder (16) is set in a cantilevered position relative to a bank or to a constructed zone (12) of the bridge so that the girder comprises a first end (24) overhanging the bank or the constructed zone, and a second end (26) overhanging a construction zone (14) of the bridge, a construction step, wherein pier elements and deck elements (10) are installed in said construction zone (14) via a first and a second lifting devices (18, 20) mounted movable on the girder (16) between the first and second ends (24, 26).

The first and second lifting devices (18, 20) cross one another along the girder during the cantilever step and/or during the construction step.

Associated bridge-building apparatus.

A crossing device aids in crossing from a near side to a far side of an obstacle. It comprises a lead assembly that is projected to the far side of the obstacle and that includes an anchor assembly and a pulley. The anchor assembly has a base, a launch tube that is secured to the base, a spike that is housed within the launch tube, and a propellant charge. The anchor assembly is anchored on the far side of the obstacle by remotely initiating the propellant charge. The explosion force drives the spike through the launch tube and the base, into a landing surface. A bridge is connected to the pulley and is pulled to span across the obstacle. The bridge, lead assembly, and anchor may be collected on the far side for additional uses.

A crossing device aids in crossing from a near side to a far side of an obstacle. It comprises a lead assembly that is projected to the far side of the obstacle and that includes an anchor assembly and a pulley. The anchor assembly has a base, a launch tube that is secured to the base, a spike that is housed within the launch tube, and a propellant charge. The anchor assembly is anchored on the far side of the obstacle by remotely initiating the propellant charge. The explosion force drives the spike through the launch tube and the base, into a landing surface. A bridge is connected to the pulley and is pulled to span across the obstacle. The bridge, lead assembly, and anchor may be collected on the far side for additional uses.

The present application describes a bridge sliding device and construction system. The device includes a slide rail assembly, a first sliding component on the rail, and a second sliding component on the first. The second component locks at the start of the first, and the bridge deck truss's weight causes the first component's end to tilt slightly, allowing it to easily cross the junction between the temporary support platform and the bridge pier. This facilitates the smooth crossing of both the first and second components over the junction. Once the first sliding component is in place, the second component unlocks and continues sliding, increasing the travel distance of the bridge deck truss. The system ensures smoother movement of the components, enhancing construction efficiency.

A method for erecting a portion of a transportation structure including two assemblies of tube segments, capable of being placed under low air pressure and through which pods may travel substantially free of air friction, the method including: (a) erecting a substructure including a first plurality of girders forming a first transportation pathway, a second plurality of girders forming a second transportation pathway and a plurality of platforms forming a service pathway, the erecting step including conveying with vehicle(s) the girders and platforms along the first and/or second transportation pathway, positioning them and having the vehicle(s) return along the service pathway, (b) conveying, with vehicle(s), the tube segments along the first and/or second transportation pathway, positioning them and having the vehicle(s) return along the service pathway. A portion of a transportation structure is also provided.

A method for erecting a portion of a transportation structure including two assemblies of tube segments, capable of being placed under low air pressure and through which pods may travel substantially free of air friction, the method including: (a) erecting a substructure including a first plurality of girders forming a first transportation pathway and a second plurality of girders forming a second transportation pathway, the erecting step including conveying with vehicle(s) the girders along one single transportation pathway, positioning them and having the vehicle(s) return along the other transportation pathway, (b) conveying, with vehicle(s), the tube segments along one single transportation pathway, positioning them and having the vehicle(s) return along the other transportation pathway. A portion of a transportation structure is also provided.

A method for erecting a portion of a transportation structure including two assemblies of tube segments, capable of being placed under low air pressure and through which pods may travel substantially free of air friction, the method including: (a) erecting a substructure including a first plurality of girders forming a first transportation pathway and a second plurality of girders forming a second transportation pathway, the erecting step including conveying with vehicle(s) the girders along one single transportation pathway, positioning them and having the vehicle(s) return along the other transportation pathway, (b) conveying, with vehicle(s), the tube segments along one single transportation pathway, positioning them and having the vehicle(s) return along the other transportation pathway. A portion of a transportation structure is also provided.

A method for erecting a portion of a transportation structure including a plurality of piers, a plurality of platforms forming a service pathway, a first plurality of girders forming a first assembly of tube segments and a first rooftop transportation pathway, a second plurality of girders forming a second assembly of tube segments and a second rooftop transportation pathway, both assemblies being capable of being placed under low air pressure and through which pods may travel substantially free of air friction, the method including conveying with vehicle(s) the girders and platforms along the first and/or second rooftop transportation pathway, positioning them and having the vehicle(s) return along the service pathway. A portion of a transportation structure is also provided.

A method for erecting a portion of a transportation structure including a plurality of piers, a plurality of platforms forming a service pathway, a first plurality of girders forming a first assembly of tube segments and a first rooftop transportation pathway, a second plurality of girders forming a second assembly of tube segments and a second rooftop transportation pathway, both assemblies being capable of being placed under low air pressure and through which pods may travel substantially free of air friction, the method including conveying with vehicle(s) the girders and platforms along the first and/or second rooftop transportation pathway, positioning them and having the vehicle(s) return along the service pathway. A portion of a transportation structure is also provided.

A method for erecting a portion of a transportation structure including a plurality of piers, a plurality of platforms forming a service pathway, a first plurality of girders forming a first assembly of tube segments, capable of being placed under low air pressure and through which pods may travel substantially free of air friction, and forming a first rooftop transportation pathway the method including conveying with vehicle(s) the girders and platforms along the first transportation pathway, positioning them and having the vehicle(s) return along the service pathway. A portion of a transportation structure is also provided.