Construction of Retaining Wall – Foundation and Drainage

Retaining walls can be seen in hilly regions. These walls are built mainly to prevent soil erosion or landslides because people in hilly areas are very concerned about these disasters. Constructing retaining wall can be a fun project if you are living in a slightly sloppy land but constructing these walls in the hilly regions should be done with extreme caution and calculation, otherwise, the structure may deform or collapse. Today, we will discuss about the construction of retaining wall.

Many homeowners or landscapers do a few mistakes regarding the construction. As a result, those constructions get collapsed soon. Some of these common mistakes include poor drainage, insufficient Geotechnical investigation and data, wrong materials, unlevel base, and wrong design. There are two common sections to construct the retaining walls – foundation work and drainage work. Here we will explain both of them.

Construction of Retaining Wall

1. Foundation work

In the beginning, the builder needs to excavate the ground to a specific depth so that the footing can be established properly. To determine this, he must do the calculations for digging the ground to support the load. After excavating, carefully place the footing.

If you notice that the excavated ground is soil or gravel, then try to lay the rubble stones over the surface and slowly roll uniformly and fully. After that, the leveling concrete needs to be placed over those stones. Remember that the ground must be leveled to ensure a uniform ground. Even if the ground seems to be slanted, it should be excavated again, and those rubble rocks should be placed carefully. Remember that you have to do it for constructing a favorable and durable foundation for constructing a solid base.

After placing the foundation, it is time to build the retaining wall. If the ground is found soft, then the pile foundation needs to be applied there. It is a must to harden the foundation so that it can hold the massive load of the wall and its surrounding soil.

To construct the retaining wall, you need concrete blocks, construction adhesive, level measuring tools. Place the bottom layer by using the concrete blocks, use the level measuring tools to check the level. If they are leveled, use the adhesive material on the blocks and build the second layer of the wall. Repeat the entire process for the third and fourth layers of the wall.

2. Backfilling work

Once the construction of the wall is done, it is time for backfilling. To do that, the builder has to check whether the structure is strong and stable enough to resist any kind of soil pressure. For the backfilling, many people use native soil and then compact it to reduce the pore spaces. Instead of using the native soils, experts recommend everyone to use the gravel and stones because these particles can enhance the drainage condition. Once the backfilling is done, don’t allow the rainwater to soak the area. Take time and after a few days, the construction work will settle. This is the time to check the stability of that foundation.

Remember that drainage facilities must be included to make the foundation durable. These are the major two works to construct a retaining wall.




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