Method for rejuvenating bridge hinges

Details Method for rejuvenating bridge hinges Method for rejuvenating bridge hinges

1997-08-05

1999-07-13

Graysay, Tamara

Bridges

Bridge construction method

14 735, E01D 2100, E01D 1904

Patent

active

059209380

ABSTRACT:
A method for rejuvenating bridge hinges and bridge abutments for replacement of worn bridge bearing pads. The method can be applied to the insertion of heavy duty pipes for seismic retrofitting of joints in elevated roadways. Throughbores are drilled in the concrete span or abutment for placement of small hydraulic jacks and bearing plates. More than one jack can be used in one throughbore. A jack can be positioned in a throughbore at an angle ranging from the vertical to 45.degree. on either side of vertical for shifting the bridge hinge. The worn bridge bearing pads can either be replaced or left in place, with new bearing pads being added. The throughbores are either left unfilled or filled with concrete or steel pipes.

REFERENCES:
patent: 3564567 (1971-02-01), Mladyenovitch
patent: 3685224 (1972-08-01), Launay
patent: 5566414 (1996-10-01), Nonaka

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