Top Down Bridge Construction
Top Down Bridge Construction
(OP)
Hi,
I'm about to construct a road bridge using a Top Down method of constuction, i.e. casting the deck on the ground, then excavating out underneath at a later date.
I was wondering if anyone had any experience of this method before and if so had any ideas on an alternative to a sacrifical plywood soffit shutter to cast the deck on.
The client is not too concerned it seems with quality of finish on the underside of the bridge deck when finished, though i am wary he will be when he sees the finished product!!
Cheers
I'm about to construct a road bridge using a Top Down method of constuction, i.e. casting the deck on the ground, then excavating out underneath at a later date.
I was wondering if anyone had any experience of this method before and if so had any ideas on an alternative to a sacrifical plywood soffit shutter to cast the deck on.
The client is not too concerned it seems with quality of finish on the underside of the bridge deck when finished, though i am wary he will be when he sees the finished product!!
Cheers





RE: Top Down Bridge Construction
RE: Top Down Bridge Construction
RE: Top Down Bridge Construction
Benefits to this method are: no falsework, no shoring for bent construction (if CIDH can be used). easy access to superstructure construction(less crane time$$),no work over traffic.
Downside or risk: digging underneath bridge is not as productive as, owners are leary as this is a new method to most.
Good luck.
Daaro
RE: Top Down Bridge Construction
RE: Top Down Bridge Construction