calldocumentfacebookmessagemypartnerwindowsapplegoogleplayworkerroutecoinspinterestplaysearchsmartphonetwittercaraccordeonvideoarrowarrowdownloaddownloaduploadsection_scrollerglobemapIcon-Shop-Websitecontactenergyhomebridgeshighrisetunnelmininghousearrow-uparrow-downarrow-leftarrow-leftarrow-circle-rightchevron-right-circleuserexternlinkcartissuuclosekeystarweb

Incremental Launching Method

Producing a cycle in the stationary production facility and launching the entire superstructure

The individual section of the superstructure 15 to 30 m long, are cast in a stationary production facility (casting yard) behind the abutment. When the concrete hardens, the new section and the existing superstructure are post-tensioned together with tendons. Then the entire superstructure is advanced across the piers by one cycle length, pushed forward by hydraulic shifting devices and moving on temporary slide bearings (Teflon-coated plates). To reduce the cantilever moments while the superstructure is being launched, a launching nose made of steel is attached to the lead section so that it is already supported by the next pier.

Highlights

  • reinforcing, forming, casting and advancing in the stationary production facility: process-oriented completion of the sections for high efficiency and quality
  • the piers are constructed in advance
  • Work steps are separated: the trough is cast first, followed by casting of the deck slab
  • economical for repeat cycles and repositioning processes
  • bridging valleys, rivers, sea straits, nature conservation areas
  • nothing to obstruct traffic (road, rail, shipping) underneath the structure

Principle

  • Reinforcing, forming and casting in the stationary production facility
  • Post-tenstioning of the new cycle and the existing superstructure with tendons
  • Lowering of the casting yard; the superstructure is advanced by the hydraulic lifting/launching unit
  • Next cycle is produced
Incremental launching method
 
 
 

Get in touch

The international experience of Doka gives you pooled, concentrated knowledge for a successful project. Your contact person will help you find the best individual solution, to make your project's 'bottom line' a success, too.
In short: expert specialised formwork planning with lasting benefits for your bridge construction project.