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Should special design be catered for in bridge piers upon jacking up of superstructure for installation of bearings in Incremental Launching method?

After the completion of launching process, the superstructure has to be lifted up to allow for installation of bearings. This is usually achieved by means of jacks to raise 5-10mm successively at each pier.

In fact, it is anticipated that no special design is necessary for this operation because the effect of differential settlements at support should already be checked in bridge design. Level readings should be checked to ensure that it does not deviate from the designed figure.


This question is taken from book named – A Closer Look at Prevailing Civil Engineering Practice – What, Why and How by Vincent T. H. CHU.

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Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

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