Square alignment is termed when the angle between the bridge and

Square alignment is termed when the angle between the bridge and
| Square alignment is termed when the angle between the bridge and the river is

A. Greater than 30°

B. Exactly 45°

C. Less than 60°

D. Nearing 90°

Please scroll down to see the correct answer and solution guide.

Right Answer is: D

SOLUTION

Concept:

Bridge Alignment:

Depending upon the angle which the bridge makes with the axis of the river, the alignment can be of two types:

 a) Square Alignments: - In this the bridge is at right angle to the axis of the river.

 b) Skew Alignments: - In this the bridge is at some angle to the axis of the river which is not a right angle.

As far as possible, it is always desirable to provide the square alignment.

The skew alignment suffers from the following disadvantages:-

  1. A great skill is required for the construction of skew Bridges. Maintenance of such type of Bridges is also difficult.
  2. The water-pressure on piers in case of skew alignment is also excessive because of non-uniform flow of water underneath the bridge superstructure.
  3. The foundation of skew bridge is more susceptible to scour action

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