L-wall retaining wall

L wall retaining wall

L-ka retaining wall is a prefabricated reinforced concrete element with an angular cross-section used to protect slopes, embankments and land level differences. They are produced from concrete class C30/37 in heights from 50 to 300 cm, modular length of 100-200 cm and wall thickness of 12-20 cm. They are used in road construction, railroad construction and land development as an economical solution for soil stabilization.

For each project L-ka retaining wall price is calculated individually, taking into account the height of the elements, the length of the wall and ground conditions. We guarantee competitive rates while maintaining the highest quality of precast reinforced concrete. We invite you to get a free quote tailored to your investment.

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L-ka prefabricated retaining wall – reinforced concrete elements of retaining structures

L-ka retaining wall is a modern construction solution for protecting slopes and creating level differences. They are manufactured from high-strength concrete by vibropressing in steel molds. Prefabrication technology ensures perfect geometry and repeatability of parameters of each element. L-ka retaining walls are characterized by a monolithic structure combining a vertical wall with a horizontal base.

The design of the L-ka retaining wall is based on the principle of balance of moments of force. The base of the element with a width of 40-60% of the height provides stability for rotation. The main reinforcement made of RB500W steel ϕ12-20 mm distributed in the wall and base. Then the L-ka retaining wall has anti-shrinkage reinforcement in the form of welded mesh.

The geometric parameters of the L-ka retaining wall are adapted to the ground loads. The heights of the elements are from 50 to 300 cm with a step of 25-50 cm. The thickness of the vertical wall 12-20 cm increases with the height of the element. In addition, L-ka retaining walls have bevels and chamfers to facilitate installation.

The L-ka element connection system makes it possible to create continuous retaining lines. Tongue-and-groove connection or with steel connectors ensures tightness. It is possible to make corner and arch elements for changes of direction. In addition, L-ka retaining wall can be equipped with drainage holes.

The strength properties of the L-ka retaining wall guarantee the safety of the structure. Concrete of class C30/37 with a strength of 30 MPa ensures load-bearing capacity. Stability coefficient per displacement minimum 1.5 for all heights. However, L-ka retaining walls are also designed for additional loads from traffic.

L-ka retaining wall surface finish available in different variations. Standard smooth surface with imprinted mold structure. The possibility of a texture imitating natural stone or brick. Above all, L-ka retaining wall can be colored in the mass in gray, graphite or sand.

Key advantages of L-ka prefabricated retaining walls

L-ka retaining wall – instant installation without formwork

L-ka retaining wall is assembled at a rate of 20-30 mb per day eliminating time-consuming formwork. Finished prefabricated elements are placed by crane directly on the foundation. No need to tie reinforcement and concrete on site reduces time by 80%. Possibility of immediate backfilling with soil behind the wall after embedding. The modular system allows the realization of 100 mb of wall in 3-4 working days.

Guaranteed stability of the structure

The L-shape of the elements ensures optimal distribution of forces and moments from ground pressure. L-shaped retaining walls are designed with a safety factor of 1.5-2.0. The wide base prevents overturning even under high pressures. In addition, the element’s own weight of 0.5-3 tons stabilizes the structure. Proven stability confirmed by calculations for any height.

Weather resistance

L-ka retaining wall made of C30/37 concrete is characterized by F150 frost resistance. W8 water resistance prevents water penetration and internal erosion. L-ka retaining walls resistant to freeze-thaw cycles with road salt. Then surface resistant to abrasion and mechanical damage. Durability of a minimum of 100 years without the need for repairs.

L-ka retaining wall – versatility of height

L-ka retaining wall available in heights from 0.5 to 3.0 meters covers all needs. Gradable heights for slopes with variable slopes. L-ka retaining walls can create terraces and platforms at different levels. In addition, the modular system allows combinations of different heights. Design flexibility for any terrain.

Aesthetics and variety of finishes

The face surface of L-ka retaining walls can have different decorative textures. Imitations of split stone, sandstone or clinker brick are available. L-ka colored retaining wall retains its color for decades. In addition, the possibility of installing pots and planting climbing plants. A functional element becomes an ornament of landscaping.

Integral construction drainage

L-ka retaining walls are factory-fitted with drainage holes every 2-3 meters. The drainage system eliminates hydrostatic pressure behind the wall. L-ka retaining wall cooperates with French drainage laid at the base. However, the drainage protects against waterlogging and landslides. Comprehensive slope protection against water.

L-wall retaining wall – long-term economics

The L-ka retaining wall offers the lowest cost per years of operation. The initial investment pays for itself through no maintenance costs. L-ka retaining walls require no maintenance, painting or repairs. Subsequently, the value of the property increases due to the permanent protection. Savings of 40-50% over monolithic walls.

Safety and certification

Each element of L-ka retaining wall has static calculations and certificates. Production in accordance with PN-EN 15258 standards for prefabricated retaining walls. L-ka retaining wall CE marked with a declaration of performance. In addition, laboratory tests confirm the strength parameters. Guarantee of safety for users of the area.

Retaining wall cross section

The use of L-ka retaining walls in the construction industry

L-ka retaining wall finds its primary use in securing building plots. It is used to stabilize slopes at a difference in ground level of 0.5-3.0 m. L-ka retaining walls create terraces that allow the use of sloping plots. In addition, they are used for exits to underground garages and entrances to properties. The system dominates in single-family housing as a permanent solution.

Road construction massively uses L-ka retaining walls for embankments and excavations. L-ka retaining wall stabilizes slopes along local and provincial roads. It is used at bridge abutments and overpasses as protection. Then used at traffic junctions and traffic circles. Economical solution for road infrastructure of any category.

Multilevel parking lots and shopping centers use L-ka retaining walls as structural elements. L-ka retaining walls form ramps and driveways between parking levels. Used to form platforms for containers and aggregates. In addition, used as retaining walls for dumpsters and trafo stations. A versatile solution for commercial buildings.

Railroads use L-ka retaining walls to stabilize railroad embankments. L-ka retaining wall protects tracks in trenches and on embankments. It is used at railroad platforms as a load-bearing structure. However, also used at crossings and footbridges. The system complies with PKP PLK requirements for railroad infrastructure.

Water management uses L-ka retaining wall at reservoirs and canals. L-ka retaining walls form flood control embankments and dykes. Used at locks, weirs and water pumping stations. Primarily used as bank reinforcements of rivers and streams. Water erosion resistant hydraulic engineering solution.

l ka retaining wall

Technical parameters of L-ka retaining walls

Standard heights of L-ka retaining walls:
– L-50: height 50 cm, base 30 cm, weight 250 kg/mb
– L-80: height 80 cm, base 40 cm, weight 450 kg/mb
– L-100: height 100 cm, base 50 cm, weight 650 kg/mb
– L-120: height 120 cm, base 60 cm, weight 900 kg/mb
– L-150: height 150 cm, base 75 cm, weight 1200 kg/mb
– L-200: height 200 cm, base 100 cm, weight 1800 kg/mb
– L-250: height 250 cm, base 125 cm, weight 2500 kg/mb
– L-300: height 300 cm, base 150 cm, weight 3500 kg/mb

Structural dimensions of L-ka retaining wall:
– Modular length of the element: 100, 150, 200 cm
– Thickness of vertical wall: 12-20 cm (depending on the height)
– Thickness of the base: 15-25 cm
– Base width: 50-60% of the height
– Foundation offset: 5-10 cm

Concrete parameters for L-ka retaining walls:
– Concrete class: C30/37 (B37)
– Compressive strength: fck ≥ 30 MPa
– Water resistance: W8
– Frost resistance: F150
– Water absorption: ≤ 5%
– Exposure class: XC4, XF3

Reinforcement of L-wall retaining wall:
– Reinforcing steel: RB500W, BSt500S
– Vertical main reinforcement: ϕ12-20 mm every 10-15 cm
– Horizontal main reinforcement: ϕ12-16 mm every 15-20 cm
– Base reinforcement: ϕ12-16 mm mesh top and bottom
– Stirrups: ϕ8 mm every 20-25 cm
– Reinforcement cover: minimum 30 mm

Static parameters of L-ka retaining walls:
– Permissible ground pressure: 10-50 kN/m² (depending on height)
– Stability coefficient for rotation: ≥ 1.5
– Stability factor for displacement: ≥ 1.5
– Soil bearing capacity under the base: minimum 150 kPa
– Maximum ground slope: 1:3

Installation of the L-ka retaining wall – step-by-step execution instructions

Preparation of the ground for the L-ka retaining wall begins with the creation of a linear excavation. The width of the excavation is equal to the width of the base plus 50 cm of working space. The depth reaches a minimum of 50 cm below the ground freezing level. Then the bottom of the excavation profiled with a 1-2% slope for water drainage. Subsoil compacted to an index of Is≥0.98 controlled by a dynamic plate.

Construction of the foundation for L-ka retaining walls implemented with a layer of lean concrete. Concrete foundation C8/10 10 cm thick levels and strengthens the foundation. At greater heights, a C20/25 reinforced footing is used. In addition, laid geotextile separation fabric between the ground and the foundation. Foundation level checked with a leveler every 5 meters.

Transporting and setting up L-ka retaining wall elements requires a crane with adequate capacity. L-50 to L-120 elements can be assembled with a backhoe loader. L-ka retaining wall hooked up by the mounting loops at the top. The element is then set on the foundation while maintaining the vertical and line. Precision of setting controlled with a level and mason’s twine.

Joining successive elements of L-ka retaining walls made tongue-and-groove or flat. Vertical joints 1-2 cm filled with M10 cement mortar or sealed. L-ka retaining wall in the corners connected by special corner elements. In addition, it is possible to make arches by gradually shifting the elements. Continuity of the retaining line controlled by a 4-meter patch.

Implementation of drainage behind the L-ka retaining wall is crucial for stability. A laid layer of 16-32 mm gravel 30-50 cm thick at the base. Drainage pipe ϕ100 mm in filter backfill drains water. However, the entire space behind the wall filled with permeable soil. Geotextile filter fabric separates the drainage from the native soil.

Backfilling of the space behind the L-ka retaining wall performed in layers every 30 cm. Used non-cohesive soil with an angle of internal friction of at least 30°. Each layer compacted with light equipment to Is≥0.95. Above all, avoid concentrated loads during backfilling. The last layer is the substructure for the ground surface.

L-ka retaining wall price – current price list 2024/2025

L-ka retaining wall price is determined by the height of the element, the length of the wall and installation conditions. Retaining wall L-ka price takes into account the weight of the elements determining the cost of transportation and installation. Retaining wall L-ka price increases progressively with height – a 2m element costs 4x more than 1m. L-ka retaining wall price per mb is the basis of costing calculations. In addition, retaining wall L-ka price includes the cost of design and static calculations.

L-beam retaining wall price – calculation by height

Retaining walls L-ka price for the height of 50-80 cm is an economic option for small slopes. Retaining wall L -ka element price L-100 (1m) – the most popular – is the price base. Retaining wall L-ka price L-120 higher by 30-40% at a slightly higher height. Retaining wall L-ka price L-150 increases by 60-70% due to the weight of 1.2 tons/mb. Then the retaining wall L-ka price L-200 can be 2.5 times higher than the basic one.

L-ka retaining wall price list 2024 – current market rates

Retaining wall L-ka price list in 2024 reflects stabilization after a period of high inflation. Retaining wall L-ka price 2024 increased by 4-6% compared to the end of 2023 mainly by steel costs. Retaining wall L-ka price is effective from January 2024 for all standard heights. Retaining wall L-ka price quoted per mb or 2-meter element. However, the retaining wall L-ka price may include discounts for orders over 50 mb.

Comprehensive implementation – L-wall retaining wall price with installation

L-ka retaining wall price with installation includes delivery, crane and installation team. Retaining wall L-ka price of comprehensive service is 40-50% higher than the elements themselves. Retaining wall L-ka price may include the construction of the foundation and drainage. Retaining wall L-ka turnkey price with backfill and compaction plus 60-70%. In addition, retaining wall L-ka price comprehensive simplifies the settlement of the investment.

Specialized transport – retaining wall L-ka delivery price

Retaining walls L-ka price of transport significantly affects the cost at 0,5-3,5 tons/element. Retaining wall L-ka price of delivery by semi-trailer with HDS is 200-300 zł per course. Retaining wall L-ka unloading price with spacing along the line additionally 150-200 PLN. Retaining wall L-ka price may include free transportation when ordering more than 100 mb. In addition, retaining wall L-ka price franco construction for large projects.

Retaining wall L-ka price 2025 – forecast of changes

Retaining wall L-ka price in 2025 projected with an increase of 3-5% year-on-year. Retaining wall L-ka price list 2025 will take into account the increasing environmental requirements of production. Retaining wall L-ka price can be stabilized by prefabrication automation. Retaining wall L-ka price in 2025 will depend on the scale of infrastructure investment. Above all, retaining wall L-ka price will remain competitive with monolithic masonry.

Finishing variants – retaining wall L-ka option price

Retaining wall L-ka basic price applies to elements with smooth gray surface. Retaining wall L-ka price with decorative texture (stone, brick) higher by 15-20%. Retaining wall L-ka price of colored elements increases by 10-12%. Retaining wall L-ka price with anti-graffiti coating plus 8-10%. However, retaining wall L-ka price of each option increases aesthetic value.

L-ka retaining wall final price calculated after analysis of the project and ground conditions. Retaining wall L-ka price includes static calculations and selection of height of elements. Retaining wall L-ka price includes technical documentation and installation instructions. Retaining walls L-ka price guarantees optimal slope protection. Ultimately, retaining wall L-ka price is an investment in permanent stabilization of the site for 100 years.

Here are just some of our implementations of L-type retaining walls and other precast concrete products. This list only includes major investments on which our precast products have appeared.

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