Method for the manufacture of a bridge made of longitudinal beams and deck slab elements

A method for the manufacture of a bridge made of reinforced concrete or pretensioned concrete, the bridge comprising:

• a deck slab comprising one cantilever;
• longitudinal beams arranged underneath the deck slab, wherein in a cross-section through the completed bridge, there are arranged two longitudinal beams spaced apart from each other and approximately in parallel to the longitudinal axis of the bridge and there is formed a joint gap between respectively two adjacent longitudinal beams;
• and
• a static system of a continuous beam with two spans or a frame with two spans;
• wherein a method for manufacturing a construction section comprises operations including:
• a. providing two prefabricated, thin-walled longitudinal beams made of reinforced concrete or pretensioned concrete, which along their longitudinal extension have a single-cell, hollow box-shaped cross-section with at least two wall plates, a base plate, and a cover plate, wherein the length of a longitudinal beam is at least twice the width of the longitudinal beam;
• b. providing deck slab elements,
• wherein a deck slab element has three plates and at least one transverse girder;
• wherein the plates are made of reinforced concrete or pretensioned concrete;
• wherein the at least one transverse girder is made of reinforced concrete, pretensioned concrete, or structural steel;
• wherein the plates are formed in plan view with four corners;
• wherein the three plates are connected by the at least one transverse girder;
• wherein the at least one transverse girder is arranged in plan view at an angle of 80° to 90° to the longitudinal axis of the bridge;
• wherein the at least one transverse girder is arranged above the plates;
• wherein two opposite edges of one plate are arranged at an angle of 80° to 90° to the longitudinal axis of the bridge;
• wherein the two remaining opposite edges of each plate are arranged at an angle of 0° to 10° to the longitudinal axis of the bridge;
• and
• wherein one edge of a first plate and one edge of a second plate, as well as one edge of a second plate and a third plate, have a spacing from each other that approximately corresponds to the width at the top of a longitudinal beam, wherein the edges are arranged at an angle of 0° to 10° to the longitudinal axis of the bridge;
• c. installing the at least two longitudinal beams at the installation site;
• d. placing at least two deck slab elements on the at least two longitudinal beams;
• e. laying reinforcement on the at least two deck slab elements and over the cover plates of the at least two longitudinal beams;
• f. applying the topping concrete on the at least two deck slab elements and the cover plates of the at least two longitudinal beams to form the deck slab;
• g. laying further deck slab elements, laying reinforcement, and applying the topping concrete on the deck slab elements and the cover plates of the at least two longitudinal beams to form the deck slab;
• and
• h. repeating the operations ‘a’ to ‘g’ to manufacture a further construction section of the bridge;
• and
• wherein:
• at least one joint gap between two adjacent longitudinal beams is arranged in a plane that is approximately normal to the longitudinal axis of the bridge;
• in the at least one joint gap between the two adjacent longitudinal beams, above a portion of the base plate that is arranged adjacent to the at least one joint gap, there is implemented after the installation of the at least one longitudinal beam a longitudinal reinforcement and/or connecting reinforcement, which crosses the at least one joint gap, starting from at least one longitudinal beam and there is formed a layer of concrete over the base plate in the area of the longitudinal reinforcement and/or the connecting reinforcement;
• in the area of the at least one joint gap in or adjacent to the wall plates of the adjacent longitudinal beams, there is not installed any longitudinal reinforcement or connecting reinforcement that crosses the at least one joint gap, between the top of the layer of concrete and the bottom of the cover plate;
• and
• in the topping concrete that is applied on the deck slab elements and the cover plates of the adjacent longitudinal beams, there is arranged a continuous longitudinal reinforcement in the area of the at least one joint gap.