Patent ID: 7634832

Claim:
A bridge sleeper supporting pad in combination with a bridge beam having a projection of a rivet on a top end of the bridge beam and a bridge sleeper extending perpendicularly to a longitudinal direction of the bridge beam, said pad comprising: a main bag comprising a synthetic resin sheet and containing a first reaction solution as a base material; an inner bag disposed in the main bag and comprising a synthetic resin sheet, the inner bag containing a second reaction solution as a curing agent for mixing with the first reaction solution, and at least a part of the inner bag being operable under application of external pressure from outside the main bag; and a sub bag operatively communicating with the main bag and including a plurality of neighboring compartments such that a first said compartment is adjacent the main bag, each neighboring compartment is operatively communicable with an adjacent compartment, and adjacent neighboring compartments are partitioned by a sealed portion at least partly having an easily peeled sealed portion there along said sealed portion; the bridge sleeper supporting pad supported by the bridge beam and the bridge sleeper disposed on the bridge sleeper supporting pad so that the sub bag of the bridge sleeper supporting pad projects from the bridge sleeper; the weight of the bridge sleeper and rail on the bridge sleeper supporting pad pushes unnecessary compounds of the first reaction solution and the second reaction solution to sequentially flow into the plurality of compartments in the sub bag while a pressure of the unnecessary compounds opens the easily peeled sealed portion.