Single bore multiple anchor (SBMA) are ground anchors with multiple strands, each bonded to the soil/rock and carrying a load.
Process
A stable borehole is executed to the right diameter and designed length, filled with cement grout and then the multiple anchor strands grouted at different length within the single bore. By stressing each of the strands in turn the overall, capacity of the multiple strands is significantly increased over a single anchor of the same length.
Specialist Contact | Anthony Lucas - [email protected] - +44 (0)7908 502122
Common uses
- Excavation support
- Temporary or permanent slope stabilisation
- Can be executed in any type of soil, but especially suited to soft and medium soil conditions
Advantages
- High load capacity (20-50%) in the same soil conditions
Quality assurance
Keller has been installing anchors for many years and patented the SBMA system. We have continually evolved the technique to achieve better performance. Testing and monitoring ensures high quality execution.
Related projects
Infrastructure
Coastal protection
Due to years of corrosion, the existing sea defence and ground in front of the council car park in Lyme Regis needed to be stabilised and reinforced.
Infrastructure
A465 Heads of the Valley (Rock Anchors)
The A465 is a key strategic corridor connecting the M4 in South Wales to England. A study in the 1990s identified that improvement of the road was critical to the social and economic regeneration of the Heads of the Valleys area.
Infrastructure
Boston Tidal Barrier
The £100m Boston Barrier Tidal Flood Alleviation Scheme provides improved flood protection to more than 13,732 homes and businesses, protecting against tidal surges such as the one in 2013 which flooded more than 820 homes and businesses.
Infrastructure
Crown Dock
Anchors were required to provide stability to a new sheet piled wall at Crown Dock, Hull.
Infrastructure
Upper Holloway Bridge
The upgrading of the UK's Victorian rail network requires ever more innovative solutions such as the use of strand anchors to support bridge abutments.
