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 waterproof expansion joint for use on a deck joint defined by at least two girders, the waterproof expansion joint comprising:
a ballast protection plate dimensioned such that when installed over a deck joint the ballast protection plate inhibits ballast from falling into a deck joint;
at least one locating device positioned with respect to the ballast protection plate such that the locating device limits lateral movement of the ballast protection plate with respect to the deck joint;
a flexible sealing member dimensioned to be installed below the ballast protection plate and span the deck joint;
wherein the flexible sealing member comprises at least one flange portion, each flange portion dimensioned to be attached to girders;
wherein the at least one locating device comprises at least one centering tab and wherein each centering tab protrudes into a recess in the flexible sealing member formed by the at least one expansion feature.
2. The waterproof expansion joint of claim 1 , further comprising a plurality of expansion features.
3. The waterproof expansion joint of claim 2 , wherein said plurality of expansion features comprises expansion features of different sizes.
4. The waterproof expansion joint of claim 3 , wherein the plurality of expansion features comprises a “V” shape, wherein the angle formed by the “V” shape can change depending on the width of the deck joint.
5. The waterproof expansion joint of claim 1 , wherein each flange portion is located on a top surface of each girder, wherein the waterproof expansion joint further comprises a bridge deck waterproof membrane applied to the top of the girders and located below each flange portion, and wherein each flange portion is attached to the bridge deck waterproof membrane with an adhesive layer.
6. The waterproof expansion joint of claim 5 , further comprising an outer waterproof membrane substantially covering the rest of the waterproof expansion joint.
7. The waterproof expansion joint of claim 6 , further comprising a bond breaker layer between the ballast protection plate and the outer waterproof membrane, such that the bond breaker allows the ballast protection plate to move relative to the outer waterproof membrane.
8. The waterproof expansion joint of claim 5 , further comprising a primer wherein the primer is applied to the girders and promotes adhesion of either the bridge deck waterproof membrane or the flexible seal member to the girders.
9. The waterproof expansion joint of claim 2 , further comprising a joint support plate configured to span the deck joint and be installed below the ballast protection plate, wherein a portion of the flexible sealing member located between the girders is attached to a bottom side of the joint support plate.
10. The waterproof expansion joint of claim 1 , wherein the at least one locating device comprises at least one plate end guide, wherein the at least one plate end guide comprises at least one elongate member located on top of the girder and spaced a distance from the edge of the ballast protection plate large enough to allow for variation in the width of the deck joint but not large enough to allow the ballast protection plate to fall through the deck joint.
11. The waterproof expansion joint of claim 2 , wherein a portion of the flexible sealing member located between the girders is attached to a bottom side of the ballast protection plate.
12. The waterproof expansion joint of claim 5 , wherein the flexible sealing member, adhesive layers, and waterproof membranes are chemically compatible with one another.
13. The waterproof expansion joint of claim 12 , wherein the flexible sealing member, adhesive layer, and waterproof membranes comprise polyurea.
14. The waterproof expansion joint of claim 12 , wherein portions of the waterproof expansion joint form a monolithic structure once bonded together inhibiting the entry of water into the waterproof expansion joint.
15. A waterproof expansion joint for use on a deck joint defined by at least two girders, the waterproof expansion joint comprising:
a ballast protection plate dimensioned such that when installed over a deck joint the ballast protection plate inhibits ballast from falling into a deck joint;
at least one locating device positioned with respect to the ballast protection plate such that the locating device limits lateral movement of the ballast protection plate with respect to the deck joint;
a flexible sealing member dimensioned to be installed below the ballast protection plate and span the deck joint;
wherein the flexible sealing member comprises at least one flange portion, each flange portion dimensioned to be attached to girders; and
wherein the at least one locating device comprises at least one plate end guide, wherein the at least one plate end guide comprises at least one elongate member located on top of the girder and spaced a distance from the edge of the ballast protection plate large enough to allow for variation in the width of the deck joint but not large enough to allow the ballast protection plate to fall through the deck joint.
16. A waterproof expansion joint for use on a deck joint defined by at least two girders, the waterproof expansion joint comprising:
a ballast protection plate dimensioned such that when installed over a deck joint the ballast protection plate inhibits ballast from falling into a deck joint;
at least one locating device positioned with respect to the ballast protection plate such that the locating device limits lateral movement of the ballast protection plate with respect to the deck joint;
a flexible sealing member dimensioned to be installed below the ballast protection plate and span the deck joint;
wherein the flexible sealing member comprises at least one flange portion, each flange portion dimensioned to be attached to girders wherein the at least one flange portion is located on a top surface of each girder;
a bridge deck waterproof membrane applied to the top of the girders and located below each flange portion, and wherein each flange portion is attached to the bridge deck waterproof membrane with an adhesive layer;
an outer waterproof membrane substantially covering the rest of the waterproof expansion joint; and
a bond breaker layer between the ballast protection plate and the outer waterproof membrane, such that the bond breaker allows the ballast protection plate to move relative to the outer waterproof membrane.