METHOD TO DISASSEMBLE BRIDGE SPAN AND DEVICE FOR REALISATION OF THIS METHOD Russian patent published in 2013 - IPC E01D22/00 

FIELD: construction.

SUBSTANCE: method to disassemble a bridge span formed from blocks of T-shaped frames with closing elements assembled as suspended, consists in preliminary dismantling of a deck, alternate fixation of blocks to a weight-lifting device and cutting of blocks on cantilevers of the T-shaped frame and their lowering and removal from the construction site. Previously pier blocks of T-shaped frames are rigidly fixed to templates, a launching rail is installed on the upper slab of the span, and a device for disassembly of the span is mounted along the bridge axis, which comprises a bearing beam with a launching nose, flexible suspensions and jacks with a flexible stem. Then the device for disassembly of the span is moved along launching rails, covering spans of at least two adjacent T-shaped frames, afterwards blocks of one of T-shaped frames and a closing element are fixed with the help of flexible suspensions to the bearing beam, and the closing element is fixed to flexible stems of jacks, cut and lowered with the help of jacks. Extreme blocks of cantilevers of the T-shaped frame are fixed to flexible stems of the jack, and these blocks are cut and lowered with the help of jacks, and then jacks are moved to a new position, and their flexible stems are fixed to extreme blocks of cantilevers of the T-shaped frame. Afterwards the process of disassembly of the T-shaped frame is continued in a similar manner, at the same time after disassembly of blocks of the first T-shaped frame in process of disassembly the bearing frame of the device is moved to the following span, and similarly the next T-shaped frame is disassembled.

EFFECT: increased operational reliability.

4 cl, 10 dwg