CHAPTER 4 - EARTH RETAINING STRUCTURE

The main function of retaining walls is

• stabilize hillsides

• Control erosion

• to reduce the grades of roads

• all are correct

The coefficient of active earth pressure is_______ than the coefficient of passive pressure.

• less than

• greater than

• equal to

• insufficient data

If the angle of internal friction decreases, then Ka ___________

• decreases

• increases

• equal to zero

• does not change

The ratio of horizontal stress σh to vertical stress σv is _______

• coefficient of earth pressure

• coefficient of volume change

• coefficient of compressibility

• coefficient of consolidation

Below are design consideration of retaining wall except?

• Types of wall

• Ground water behind the wall

• Material used in the construction of wall

• cost involve

• Types of soil

This wall resist the earth pressure exerted by backfill by its own self weight.

• gravity wall

• anchored wall

• cantilever wall

• pile wall

All of there are components of retaining wall except?

• toe

• stem

• weep holes

• heel

• surcharge

Gravity type retaining wall type is suitable for retaining backfill up to

• 3-5 m

• 5-8 m

• 4 - 7 m

• Any hight

Sheet piles are generally made of

• Concrete

• Steel

• Timber

• All of the above

Point of contra flexure observed in which type of sheet pile

• Free cantilever sheet pile

• Cantilever Sheet Pile Wall with Backfill

• Free earth support anchored piles

• Fixed earth support anchored piles.