Question

In a bridge, which are the components of an abutment?

(i) Breast Wall

(ii) Wing Wall

(iii) Back Wall 

1. Only (i) 
2. (i) and (ii) 
3. (ii) and (iii) 
4. (i), (ii) and (iii) 

Answer 1

Correct Answer - Option 4 : (i), (ii) and (iii) 

Explanation:

Bridge Abutment:

(i) Bridge abutments connect the deck, or surface of the bridge, to the ground and help support its weight both horizontally and vertically. On short bridges, one abutment is placed at either end of the bridge and connected to the embankment, sometimes including a retaining wall.

(ii) Longer bridges include additional abutments placed along the length, or span, of the bridge to provide necessary support at regular intervals. While these will not include a retaining wall, they still provide vertical support. The choice of abutment depends on the available space, geologic features of the bridge site, and available funding for the project.

Components of bridge abutment:

(i) Abutments placed at either end of a bridge typically include the following five components, while those placed along the bridge span will lack both the wing walls and the backwall.

• Bridge set (Breast wall)
• Wing wall
• Back wall
• Pile 
• Footing