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The purpose of the bridge approach slab is to significantly reduce local settlement and to accommodate global settlement by providing a gradual transition between the roadway and the bridge deck.
T o avoid a hard point on a bridge, you construct an approach slab. This is a concrete slab below the pavement that extends ten or fifteen feet beyond the edge of the bridge.
The approach slab rests on the end of a bridge to act as a transition between the road and the concrete bridge slab.
Perform a literature search to identify state-of-the-art prac-tices for design, construction, and maintenance of bridge approaches to reduce the bridge approach settlement prob-lem. Investigate bridge approach problems at existing.
There are three common locations for expansion joints in bridge approach systems: (1) in front of the backwall between the deck and the abutment; (2) behind the backwall between the abutment and the approach; and (3) at the roadway end of the approach slab.
Information about the following topics was collected: â ¢ Design criteria and standards for approach slabs, approach pavement, and supporting elements such as sleeper slabs and backfill materials; â ¢ Performance criteria for bridge approach systems such as surface smoothness and joint performance; â ¢ Practices related to the connection ...
Approach slab is a structural concrete slab that spans from the back wall of the abutment (i.e. end of the bridge floor) to the beginning of the paving section. The purpose of the approach slab is to carry the dead and live loads over the backfill behind the...
Elimination of expansion joints between the bridge deck and approach slabs in an integral abutment bridge (IAB) decreases the potential for water and salt damage to a bridge’s superstructure and bearings.
Approach slab is a structural concrete slab that spans from the back wall of the abutment (i.e. end of the bridge floor) to the beginning of the paving section. The purpose of the approach slab is to carry the dead and live loads over the backfill behind the abutments to avoid differential settlement that causes bumps at the bridge ends.
Assessing the behavior of bridge approach systems requires a holistic understand- ing of the different components that form the approach, which include approach slabs and their wearing surfaces; abutments and their foundations; connections between the deck, abutment, and approach slab; expansion joints; approach slab supports (such as sleeper ...