- What is it, what is it for?
- When to use?
- Types of retaining walls
- Materials used in the retaining wall
- How much is the m²? #price
Have you heard of retaining wall? Maybe this expression is new to you, but there are also other denominations like wall or containment.
If none of the expressions helped you, no panics. In the post we will explain everything, so you will find out what it is, when to use it and so many other tips for those who want to know more about retaining wall.
So, let's stop talking and let's go to the wall of contention, that is, to the post!
- 1 What is it, what is it for?
- 2 When to use?
- 3 Types of retaining walls
- 3.1 Gravity retaining wall
- 3.2 Flexural retaining wall
- 4 Materials used in the retaining wall
- 4.1 Stones
- 4.2 Blocks
- 4.3 Tire
- 4.4 Concrete
- 5 Drainage
- 6 How much is the m²? #price
What is it, what is it for?
For those who use the term retaining wall or support, the words already give a good hint of what this element of civil engineering is.
The retaining wall is a structure built to give security and stability to the terrain.
This type of wall is usually built on uneven terrain, because there is a cut in the ground to leave it flat, and so the area of accommodation of the earth arises. So that this land does not return to the terrain, especially on rainy days, the wall is built as a barrier to hold the land well.
In this way, the retaining wall must be very well planned and executed to withstand the pressure of the earth and thus serve as support to avoid landslides and landslides.
When to use?
- Sloping Grounds: if the terrain to be used has a certain slope, the retaining wall is ideal for supporting the inclined part and avoiding that inclined part to become heavy with rain and to collapse. In addition, the wall still helps to leave the ground flatter and ideal for construction.
Plants decorate the garden
- Cut on the ground: for those who want to flatten the ground, cutting ends up being one of the options to open a flat space, however, this cut directs the excess of land to another part of the terrain and thus it is necessary that the terrain gains a retaining wall to hold the earth that has been moved.
The construction was made with structural blocks
Types of retaining walls
Gravity retaining wall
This type of wall is very indicated for uneven terrain, provided that the difference is between 1.5 and 5 meters in height. Containment can be made from different materials such as stones, concrete, tires, among others.
Flexural retaining wall
The bending containment wall is used in case of force. This is because the wall must be resilient over the forces that fall on it, and so the construction must be done with reinforced concrete or other techniques, provided there is a balance between the earth contained by the wall and the force it makes on the ground, avoiding slips.
Materials used in the retaining wall
- Dry stone: this type of wall is also known as a supporting wall like this because the stones are joined in a wire, forming a kind of cage. Then this junction of stones forms a wall and serves as a support. This type of material and technique is often used on roads; because they leave the wall permeable and with a natural drainage system, and it has a low cost.
The cages are made from wire fences
- Stone with grout: in this type of construction the stones are joined by grouting, and this hinders the process of draining the water, so as to require a technique to create a water drain system. The construction tends to be very cost-effective when one has stones with ease, otherwise the cost may be higher. The technique has low deformation capacity, and is only suitable for walls with a maximum height of 3 meters.
The glass wall is modern
The wall of support of masonry is one of the lowest cost options. The technique can utilize structural blocks or bricks, which are joined through mortar.
This type of construction usually has less power of sustentation, therefore it is indicated in cases of little slope and earth pressure.
In addition to considering the construction of the wall, this system still requires a drainage technique for rainwater, preventing the soil from accumulating water and exerting more force on the barrier.
O reuse of old tires is a possibility when it comes to building the retaining wall.
The tires are tied together and form the wall that stands on the slope. The cost is usually very low, since the material is reused, and because it has good drainage, it does not require the use of other techniques.
The earth itself supports the tires
Although reinforced concrete is a great option for the retaining wall, because of its stability, the disadvantage of this material is at high cost.
To make a concrete wall you have to structure all the woodwork and only then fill the wall. The process is more time consuming and implies the highest price, so it is usually very little used.
Some materials and techniques used in the barrier require a drainage system. And this happens because with the rain the earth tends to become heavier and to force the containment.
With the wet earth force the wall may not be able to sustain all the pressure. Therefore, if you have not opted for a material with a good level of drainage, it is ideal to consider a system that drains the water and prevents the soil from becoming soaked.
In general, the drainage of the wall is usually done through the waterproofing of the wall and a system that captures the water directing it to another point of drainage.
To avoid such problems, it is essential to hire a professional to analyze the need or not, and the best type of drainage to be used in the retaining wall.
How much is the m²? #price
The cost is something that varies a lot and it depends on the material used, the need for a drainage system and the labor used, so we are only considering an average value.
The most expensive price is usually the reinforced concrete support wall with a drainage system that leaves around R $ 800 m².
The other options are usually cheaper, since the block wall is around R $ 500 m², and the cheaper the stone cages are cost an average of R $ 300 m².
Understand what is and how it works retaining wall? Now you will understand what the civilian professional is explaining and will not get lost during the conversation and guidelines for your project.