Retaining Walls
This is aimed at helping students understand the design and implementation constraints of retaining walls
What and why?
Retaining walls are a type of wall that hold back usually soil one side. They walls are a staple on undulating properties in the city. But, why? There are several reasons for putting in a retaining wall, and sometimes some other methods that could be used instead.
Creating a Flat Space - When spaces is limited in the city, flat spaces for function are important. A retaining wall is a way of turning a slope into a flat space.
Reducing Erosion - Reducing erosion on slopes where there is not appropriate vegetation to limit it
Stopping Landslides
Controlling water
RELEVANT REGULATIONS
NCC Part 3.1.2 Earth Retaining Structures
Australian Standard 4678: Earth Retaining Structures
NCC Part 3.1.3 Drainage
NCC 3.3 Drainage
Creating a Flat Space
When spaces is limited in the city flat spaces for function are important. A retaining wall is a way of turning a slope into a flat space.
Water
Controlling the movement of water can be a reason for a making a retaining wall but also the most common reason for failure. The pressure of water built up pushes against a wall.
Design Consideration
Check with the council and an engineer
Is it going to be located near a boundary?
How far away are trees going to be planted?
Should the height change take place in one wall or multiple walls?
Will its creation effect structures on my site and the surrounding sites?
Construction Principles
Retaining Walls - Engineering Models
Soil and Water Pressure - Engineering Models
Methods
Posts (Pile and Beam)
Usually used for timber and concrete
Foundation - Strip Footing
Usually used for concrete, bricks, block and gabion
Materials
Stone
Timber
Masonary
Gabion
Session Outline
What and why?
Design Considerations
Types of Retaining Walls
Materials