T-Wall® Precast Modular Gravity Retaining Walls
T-Wall® is Reinforced Earth’s patented innovative precast concrete modular gravity retaining wall solution. It is constructed by combining structurally reinforced concrete units with engineered backfill; monolithic concrete units are cast with perpendicular stems attached to a generally rectangular or square facing that together forms the shape of a “T”.
This precast concrete wall solution is suitable for building grade separations for roadways and railways. T-Wall® offers efficient installation and minimal maintenance.
Applications
T-Wall® is used wherever conventional retaining walls, non-gravity cantilevered walls, anchored walls, mechanically stabilized earth (MSE) walls and prefabricated modular walls are considered. Suited to build in areas having restrictive excavation limits, engineers specify this precast modular retaining wall for building grade separations for roadways and railways, and for earth retention along coastlines and waterways. Urban and residential developers also appreciate T-Wall® for landscaping and commercial work sites.
Major benefits
- Excavation and backfill quantities are minimised
- Allows for a wide range of acceptable backfill including recycled materials
- Shallow or deep structural foundations are not required
- Limited requirements for bracing or external support during installation
- Little if any mechanical connections required
- Approved by most major railway and highway agencies
- Custom architectural finishes
Assembly
Installation is simple and efficient. The units are aligned on levelling pads along the base and then are repeatedly stacked and backfilled with layers of compacted granular soil or alternative fill measures. This forms a composite gravity mass capable of supporting very high static and dynamic loads.
For a conventional T-Wall® installation, as the units are stacked, the length of the stems decreases as the wall height increases, therefore reducing the amount of excavation and backfill quantities required to install as compared to other gravity wall systems.
For “inverted” T-Wall® installation, the length of the stems is shortest along the base course, and increase as the wall height increases. Similar to a conventional T-Wall®, the amount of excavation and backfill quantities required are minimised.
Design fundamentals
Reinforced Earth engineers are experts in mastering soil-structure interaction design. The fundamental design approach assures that the stem allows for pull-out resistance against the lateral earth pressure exerted on the rear of the facing, therefore internally stabilising the structure. The basic design of a T-Wall® addresses both the internal and external stability of the wall system and includes, but not limited to:
- Internal pull-out
- Internal overturning
- Internal structural design of the concrete units
- External overturning
- External sliding
- External bearing pressure
Reinforced Earth’s Australian engineers address project-specific site conditions in each T-Wall® design. For example, seismic loading, drainage, water height and fixtures such as traffic barriers, parapets and noise walls that are supported by or influence the structure’s performance.
Benefits
Durability
Durability
Due to its characteristics coupled with world-class engineering expertise, T-Wall® has proven to be a very durable solution.
Reduced maintenance
Reduced maintenance
T-Wall® requires very limited maintenance, allowing for significant reduction of relaetd costs on the long run.
Aesthetics
Aesthetics
T-Wall® offers a wide range of architectural finish options.
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