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Construction basics
Once the basic requirements are met, the construction of the modular Easyblock retaining wall system can begin.
Excavation
Before excavation, it should be clarified whether there are any existing installations around the new structure. The slope angle, in the case of free slopes (without structural safety measures), depends on the existing soil conditions, the slope height, the load, and the flow through of the slope, and should be assessed by a geotechnical expert.
Formation Level
The formation level required for the laying of the precast units must be stable, frost-resistant, durable, and independent of climatic influences. The elevation of the formation level depends on the frost depth of the local conditions. In Austria, this is at least 1.00 m below the natural ground level.
Laying
The laying begins with the placement of the base block row. When positioning the first stone, special attention must be paid to the correct horizontal alignment to ensure that the construction of the retaining wall starts as planned. Any subsequent adjustments to the position will require significant time and effort. The first row, as well as the following rows, must be installed jointless and flush, ensuring that it fully rests on the foundation or frost protection layer. The base block has no groove on the bottom side to create higher friction resistance (preventing the structure from sliding). The blocks must be arranged side by side as closely as possible, with minimal gaps (lateral contact surface).
Gaps created by the conicity of the blocks should be filled, along with the back of the wall, using crushed stone (16/32). After backfilling (front and back), the first compaction should be done at the front side of the retaining wall system to prevent the block row from sliding forward. The embedding depth of the compacted soil at the front must not fall below the specified values over the structure's service life. Compaction is done in layers of 20 cm, and the Proctor density must be at least 95%.
Drainage is installed at the back of the wall, with a drainage pipe at the base that has a gradient of at least 2% for water drainage. A filter fleece prevents the penetration of the entire drainage system with fine soil components from the surrounding layers, ensuring the functionality of the drainage remains intact.
The subsequent rows are laid in a stretcher bond pattern (analogous to brickwork). It must be made sure that the blocks are laid with full contact over the entire area and correctly positioned at the right height. Before setting the stones, ensure the surface is clean (free of gravel). The blocks must be pushed horizontally toward the back as far as they can go (tongue and groove principle).
Heavy compaction equipment must be selected in coordination with the supplier or static engineer. Pay attention to any additional stresses on the retaining wall!