Retaining wall type

Reinforced block retaining walls

About reinforced block walls

Reinforced block walls are the most economical solution for interlocking concrete block walls over 3m in height.

The wall construction is very fast when compared with traditional construction. The wall is reinforced using bars that thread through the blocks into the foundation. The foundation and the wall act together as a cantilever giving the structure strength and the ability to restrain the retaining material.

For more guidance check out our design guide below or click here to ask a question..

Reinforced block retaining wall sizes

Depending on the height of the wall, the walls are built using either a RWS – R 600 or RWS – R 800 blocks.

600-R-Blocks

RWS – R 600 blocks are used for wall heights from 1.8m to 4.8m as you can see in the table above.

The dimensions of this block are 600mm wide x 800mm high x 1800mm, 1500mm, 1200mm, 900mm and 800mm long.

The walls are built to a modular of 600mm.

Each standard block builds 1.08 m2 of the wall.

The blocks are made from high-strength (50N/mm2) concrete, using natural stone and aggregates. This allows the blocks to have high levels of durability.

As each block has its own lifting pin cast into it – you can easily change the way in which they are configured without the need for specialist lifting equipment or grabs.

Patent pending – The reinforced block are patent protected and are manufactured under licence.

800-R-Block

RWS – R 800 blocks are used for wall heights from 5.6m to 6.4m as you can see in the table above.

The dimensions of this block are 800mm wide x 800mm high x 1600mm, and 800mm long.

Each standard block builds 1.28 m2 of the wall.

The smaller lengths allow for bonding. The walls are built to a modular of 800mm.

The blocks are made from high-strength (50N/mm2) concrete, using natural stone and aggregates. This allows the blocks to have high levels of durability.

As each block has its own lifting pin cast into it – you can easily change the way in which they are configured without the need for specialist lifting equipment or grabs.

Patent pending – The reinforced block are patent protected and are manufactured under licence.

Reinforced block retaining wall design guide

The design table below shows an example of the wall heights. We can design walls for many civil engineering problems using reinforced block retaining walls.

Height 1800 2400 3000 3600 4200 4800 5600 6400
Block Type 600 600 600 600 600 600 800 800
Base Width 1400 1800 2200 2400 2800 3200 4800 5600
Base Depth 200 300 300 400 500 500 600 700
Rebar Toe A393 A393 A393 B785 B785 B785 B785 H16@200
Rebar Heel A393 A393 B785 H16@200 H16@200 H20@200 H20@200 H25@200
Pocket Rebar 1 H25 1 H25 1 H25 1 H25 2 H25 2 H25 1 H40 2 H40
Surcharge 10kn/m² 10kn/m² 10kn/m² 10kn/m² 10kn/m² 10kn/m² 10kn/m² 10kn/m²
Factor Of Safety M=1.5 M=1.5 M=1.5 M=1.5 M=1.5 M=1.5 M=1.5 M=1.5
Cost Index 32 49 60 76 102 116 166 218
Sketch Reinforced-Block-Retaining-Wall sketch 1 Reinforced-Block-Retaining-Wall sketch 2 Reinforced-Block-Retaining-Wall sketch 3 Reinforced-Block-Retaining-Wall sketch 4 Reinforced-Block-Retaining-Wall sketch 5 Reinforced-Block-Retaining-Wall sketch 6 Reinforced-Block-Retaining-Wall sketch 7 Reinforced-Block-Retaining-Wall sketch 8

 

The design table above for the reinforced block retaining walls are indicative designs based upon a base material with allowable bearing pressure of >200kPa.

The retained material is assumed to be well graded, granular backfill with back of wall drainage or weep holes to relieve hydrostatic pressure.

All indicative information presented in this table is based upon assumed loading and ground conditions.

This table is for guidance purposes only and may be subject to change following a detailed, site-specific design developed by an approved structural engineer.

 

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    Retaining wall design service

    The design of a retaining wall requires knowledge of the retaining material, the water table, the ground bearing capacity and any site constraints. The design requires a ground investigation and a structural engineer to ensure the design is fit for purpose.

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    FAQs about reinforced block retaining walls

    What is a reinforced concrete block wall

    A reinforced concrete block wall is built using either 600mm x 600mm or 800mm x 800mm concrete lego type blocks with holes through them. The holes align up to form a duct through the wall. Reinforced bars are then treaded through the holes and connected to the reinforced raft base. The wall acts as an L shaped cantilever retaining wall.

    How much does a reinforced concrete block wall cost?

    The cost to build a reinforced concrete block retaining wall changes with the height of the wall, scale of project, location of the project and any site constraints.

    We do have a comprehensive price table and budget calculator in our price guide. The price guide costs change over time so we keep it in one document.

    You can download the document from this link. Get the price guide.

    How heavy are the blocks?

    The 600 x 600 x 1800  blocks weigh 1550kg

    The 800 x 800 x 1600mm blocks weigh 2450kg

    How may blocks can you get on a full articulated wagon?

    You can get 18 number 600 x 600 x 1800 blocks on a full 27 ton wagon and 11 number 800 x 800 x 1600 blocks on a full 27 ton wagon.

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