What are the bumps on a bridge?
Bridge bumps are a result of differential settlement of bridge/approach slab and/or approach slab/pavement. The most common bumps are at the end of the bridges 4 Page 5 caused when the soil beneath the approach slab looses contact with it. It can also be caused due to strength deficient approach slabs.
What is a bridge approach slab?
The approach slab acts as an intermediate bridge to span the portion of embankment directly behind the abutment/backwall which was excavated to construct the abutment/backwall. The approach slab bridges the gap between the rigid abutment and the undisturbed embankment beyond the area excavated.
Why do bridges have approach slabs?
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. All bridge preliminary plans shall show approach slabs at the ends of the bridges.
What is a bearing on a bridge?
A bridge bearing carries the loads or movement in both vertical and horizontal directions from the bridge superstructure and transfers those loads to the bridge piers and abutments. The loads can be live load and dead load in vertical directions, or wind load, earthquake load, etc., in horizontal directions.
What are the ends of a bridge called?
Abutment: Abutments are the elements at the ends of a bridge, which provide support for it. They absorb many of the forces placed on the bridge and act as retaining walls that prevent the earth under the approach to the bridge from moving.
Why do bridges need bearings?
How many types of bearing are there in bridge?
Bearing used in the construction of bridge structure is divided into two major categories namely expansion bearings and fixed bearings.
What are the two ends of a bridge that support its weight?
They do it by carefully balancing two main kinds of forces called compression (a pushing or squeezing force, acting inward) and tension (a pulling or stretching force, acting outward), channeling the load (the total weight of the bridge and the things it carries) onto abutments (the supports at either side) and piers ( …
What is Ante’s law?
Ante’s law states that “the total periodontal membrane area of the abutment teeth must equal or exceed that of the teeth to be replaced.”1 For more than 80 years, this law has been taught in standard textbooks of prosthodontics as an important condition influencing FDP design.