Waterproof expansion joint
A waterproof expansion joint comprises a ballast protection plate and at least one locating device configured to retain the ballast protection plate over a deck joint. A flexible sealing member located below the ballast protection plate can include at least one flange portion and at least one expansion feature. Each expansion feature can include a shape preformed into the flexible sealing member extending downward into the deck joint and configured to deflect, enabling variation in the width of the flexible sealing member to match the width of the deck joint.
1. A method of waterproofing a deck joint of a bridge, the method comprising:
applying a bridge deck waterproof membrane over a portion of the top surface of at least two girders which define a deck joint;
applying an adhesive layer over a portion of the waterproof membrane;
installing a flexible sealing member, wherein the flexible sealing member comprises two flange portions, wherein installing a flexible sealing member comprises placing each flange portion on the adhesive layer on each girder, such that each flange portion bonds to each girder;
installing a ballast protection plate spanning the deck joint; and
installing a pair of locating devices to retain the ballast protection plate from falling into the deck joint, wherein each locating device is installed on the top surface of each girder.
2. The method waterproofing a deck joint of a bridge of claim 1 , further comprising adjusting the width of the flexible sealing member to match the width of the deck joint by deflecting at least one expansion feature of the flexible sealing member, wherein an expansion feature comprises a shape preformed into the flexible sealing member.
3. The method waterproofing a deck joint of a bridge of claim 2 , further comprising adhering a portion of the flexible sealing member to a joint support plate and installing the joint support plate over the deck joint.
4. The method waterproofing a deck joint of a bridge of claim 2 , further comprising applying a bond breaker to a top portion of the ballast protection plate and applying an outer waterproof membrane over the top of and substantially encompassing the ballast protection plate, flexible sealing member, and at least a portion of the bridge deck waterproof membrane.
5. The method waterproofing a deck joint of a bridge of claim 4 , wherein applying the bridge deck waterproof membrane and the outer waterproof membrane comprises spraying each waterproof membrane onto a surface while each waterproof membrane is in a substantially fluid state.
6. The method waterproofing a deck joint of a bridge of claim 5 , further comprising applying a primer to a portion of the top surface of at least two girders which define a deck joint and applying the bridge deck waterproof membrane over at least a portion of the primer.