Slope | Rock stabilization
The purpose of slope/rock stabilization grouting is to prevent further damage or failure of an existing structure by installing a system of grout pipes, which are then filled with cement or chemical to form a solid barrier against any pressure from the ground below.
Advantages
- Strength and durability: The strength of the chemical used to fill the pipes is high enough that it can withstand all but the most extreme amounts of pressure from underneath. In addition, because this method uses pipes that are anchored into place with concrete (or other) anchors, there is no risk of them moving or shifting under stress like other types of grout might do.
- Low impact: Because this type of grouting involves drilling holes at specific points along a slope before filling them in with chemical, there is virtually no impact on surrounding trees or grassy areas. This means that you will not have to worry about destroying anything when carrying out this project.
- Cost-Effective: This method is cost-effective when compared to other methods such as hydro-sealing into cracks in rock faces, etc., as it saves considerable costs on both labor and materials used. The process is relatively simple and does not require much labor.
- Minimal Disruption: It is also easy to implement with minimal disruption to the surrounding area since it does not involve any blasting or construction work.
- Considerable stability: Slope stability problems are often caused by poor ground conditions, such as weak rock foundations that cannot support the weight of the overlying materials.
In these situations, slope stabilization grouting can be used to create a new foundation for the slope, thereby improving its stability and preventing further damage.
Methodology
The methodology of slope stabilization grouting involves the following:
- Evaluation of the stability of the slope
- Excavation of the area to be grouted, to a depth of at least 100mm below the rock surface
- Placing a temporary support around the edges of the excavation to prevent further erosion
- Providing access for workers via a temporary track way or scaffolding if necessary
- Removing any vegetation and topsoil from within the affected area
- Inserting steel rods into the ground behind each row of trenching to ensure that it remains stable during grouting
- Filling in excavated soil over the rock face with finer slurry material to create a uniform slope profile across the site
The slurry is injected into the ground through specially-designed wells. Once the slurry has been injected, it sets up with time and becomes solidified. The solidified slurry can then be used as a barrier against erosion or to support structures on top of it like roads or buildings.
We provide a comprehensive range of slope / rock stabilization grouting services. From on-site supervision and project management through to final report preparation, our highly skilled and experienced team has the expertise to get your job done right the first time – delivering value for money and the best outcome for your project.
