Retaining walls are usually used to bring water and debris under the foundation. Depending on the type of land and structure, these walls can be single wall, wall-to-wall or double-walled. They usually run from the grade plane to the house to form a border that protects the structural frame of the house from groundwater, snowmelt and rain. In residential areas, these walls are significant because they help protect the foundation from extreme weather conditions, and the foundation prevents the formation of water, which will eventually damage the foundation.
Retaining Walls in Perth are made up of a mixture of stones, cement, and concrete that is reinforced with bricks or simple square hole in the ground. In most cases, the wall requires a drain pipe system, so that excess water does not flow into the house. During winter, when the pressure of the water is low, they help reduce freezing and thawing of the soil.
There are three main types of concrete: groutless, semi-groutless and built-up. Groutless concrete is less porous than grout and more resistant to moisture and erosion. On the other hand, built-up concrete has cement inserted between the grout and a cement veneer. It offers better structural integrity and resists deformation.
In most cities, retaining walls are built in the aftermath of a natural flood. A gravel fill filled with sand and rocks allows the retaining wall to be built on and can be filled with aggregate. Natural water does not permeate through the gravel and serves as a reservoir to absorb excess water.
Soil material is most commonly used for a retaining wall. Usually, gravel and clay materials are mixed and then compacted to form a mud wall. If the soil is loose, additional fillers may be added, such as sand, silt and perlite. During dry seasons, the concrete wall can be topped with mulch or grass.
Many masonry walls have reinforcement. For example, there are irregular studs or mortise and tenon joints that serve as bracing. The posts can be made of either cast iron or stone.
Concrete retaining walls can be formed in many ways. For example, precast concrete walls are usually constructed using metal sheathing and pre-engineered framework, which help eliminate costs. With the benefit of computerized technology, the concrete wall is then built in stages using different approaches, until the final wall is constructed and waterproofed.
With innovative technologies, brick and stone slabs can be attached to the retaining wall for added strength. Also, lime mortar can be laid between the slabs for extra strength and colour.
New technologies enable more flexibility in structural changes. For example, the use of concrete walls can be repaired after construction has been completed. It is particularly true for emergency repairs that might be necessary during the construction project.
Moreover, structural steel beams can be installed in Retaining Walls in Perth. Steel is most often used for foundation walls and the lateral walls because it is more robust than wood; however, it also can withstand high winds and natural weather conditions. Roofing materials can also be used as reinforcement for the structure of the wall.
In this modern and dynamic construction industry, the use of retaining walls has become a necessity. Regardless of the design of the wall, it is essential to build it to last. Therefore, proper maintenance must be applied to all retaining walls.