Case Study Information
Project Type: Slope Protection
Project Type (Other): Government
Project Start Date: November 4, 2025
Project Objective:
The primary objective of this project is to protect river slope walls from water erosion that can cause damage and slope instability. In this project, concrete canvas is combined with gabion structures as the primary slope retaining walls. The concrete canvas is installed over the gabion installation to prevent water intrusion from the upper part of the slope. This minimizes the risk of sliding or water pressure that can weaken and push the gabion structure, thereby maintaining slope stability and the safety of the surrounding area.
Project Location: Muaro Bungo, Jambi
Number of Installers: 6 people
Amount of Concrete Canvas Used: 180 m²
Roll Format: Bulk Roll
Type/Thickness: CCX-M
Installation Method (Layup): Vertical
Installation Process
Equipment used
- Cutter/utility knife
- J-Pin 40 cm
- 30 mm stainless steel screws
Alternatives and Reasons for Choosing Concrete Canvas
In the previous planning stage, the use of shotcrete for slope protection was considered. However, this method was deemed unsuitable due to the slope's location behind residential areas, which limited access to equipment and work space. Furthermore, a more flexible material was needed to adapt to land subsidence or slope shifts, thereby reducing the risk of structural failure. Therefore, concrete canvas was chosen as a more appropriate solution because it can be pre-cut to suit field requirements and has semi-ductile properties that are more tolerant of ground movement.
Environmental Conditions
The project's environmental conditions are behind residential areas and located on the riverbank. The concrete canvas installation area is on a slope approximately 15 meters above the normal river level. However, during floods, the river water level can rise to the top of the slope. This makes the slope highly vulnerable to erosion and water pressure, necessitating an effective slope protection system to maintain the stability and safety of the surrounding environment.
Land Preparation
- Installation of Gabion Structures
- Slope Formation
- Vegetation Clearing
Installation, Bonding, and Sealing Methods
The concrete canvas installation method is carried out vertically, starting from the floor or slope trap, then connecting it to the slope body up to the top. The installation is divided into seven segments. Each overlap joint is tightened using 3 cm screws. To increase stability, 40 cm J-Pin anchors are installed at the slope corners, at the overlap joints at the top of the slope, and on the slope body at a distance of every 3 meters. This method aims to ensure the concrete canvas is firmly attached and does not shift due to water flow or pressure from ground movement.
Hydration Method
The concrete canvas hydration process is carried out manually without the use of a water pump. Workers collect water from the river using buckets and then evenly spray it directly onto the surface of the concrete canvas, starting from the top of the slope down to the floor or slope trap. This method ensures that all the material is thoroughly hydrated, allowing it to harden properly and form a stable protective layer on the slope.
Installation Duration
Installation productivity is approximately 380 m² of Concrete Canvas per day.
Project Success
The concrete canvas slope protection project was deemed successful, as the material was installed properly and served its intended purpose of maintaining slope stability. This success was also demonstrated by the owner's appreciation, demonstrating satisfaction with the quality of the work and the effectiveness of the implemented solution.
