There are manyconstruction like underground tanks, Approaches of Bridge structures and other high embankments , in which specific walls are used to support Soil Embankments , these specific walls are known as RETAINING WALLS. According to features these are classified as –
· Gravity retaining walls
· Sheet pilling
· Anchored etc.
Retaining walls face two problems :-
These problems occur in CANTILEVER and COUNTERFORT retaining walls.
Normally up to 5m height , cantilever retaining walls are proposed for construction . Above this counterfort retaining walls are economical . But after 10 m height counterfort retaining walls also become uneconomical . So it becomes problematic to retain these high embankments , in such cases instead of constructing two separate counterfort retaining walls , it would be economical to construct RCC BOX type retaining walls. In this two counterfort retaining walls will be connected together to form a RCC BOX by connecting vertical walls and transverse walls , these transverse walls will restrain the vertical walls from deflecting outside . Such RCC BOX retaining walls will be very economical to the high embankments like approaches of bridges . The bottom raft will be one piece so it will provide relief to the bearing capacity of the soil also.
By providing RCC BOX type retaining walls these problems are automatically solved . Since the RCC BOX is one piece so overturning does not occur . The RCC BOX resting on raft , so the area is increased as such the slipping problems is also solved.
Prepared By : Prof. J S Kushwah (HOD - CIVIL)