A55 Slab Foundation strengthening
Background Geobear was contracted by Tarmac to deliver concrete slab stabilisation work on a section of the A55. A GPR survey revealed voiding across 193 slabs on a section of the road between junction 34-35. The voiding was a result of general wear and tear from almost 40 years of axle loads and more recently […]
Bristol Temple Meads Platform Strengthening
Bristol Temple Meads Platform Strengthening The roof structure at Bristol Temple Meads Station was due for refurbishment/repair, this work was to be carried out from scaffolds spanning across platforms and live tracks. However, the existing platform structure was not able to support the load from the scaffold support legs and required strengthening prior to […]
- Utilities
Sinking Sewer Ground Improvement
Sewer System Ground Improvement – UK A road and sewer system had experienced significant settlement of 100-200mm, initially caused by flash flooding. Consequently, washout beneath the existing sewer pipe occurred, meaning it bowed and the joints failed which caused further soil erosion. This led to an accelerated rate of settlement and loss of ground support […]
- Rails
Kentish Town Slab Track Treatment
Kentish Town Slab Track Treatment Geobear produced an innovative design solution to stabilise a section of rail slab track between Kentish Town station and St Pancras station, London. We were presented with a significant geotechnical challenge where the slab track had experienced rapid deterioration which manifested in concrete slab cracking in numerous locations. The main […]
- Airports
- Infrastructure
Airfield Concrete Slab Treatment
Background A number of airfield pavement slabs at a major London Airport had settled excessively due to soft underlying conditions combined with potential drainage issues, with up to 50mm of maximum settlement on some slabs (see Figure 1). The settlement of these slabs could disrupt aircraft taxiing from/to landing and take-off zones, therefore, timely maintenance […]
Soft clay treatment
Treatment of very soft clays via expansive geopolymer injection Background Geobear was requested to stabilise an area of ground at a site in Scotland, covering approximately 600 m2, which was suffering from subsidence (Figure 1). The subsidence was thought to be associated with water leakage from a deeply buried sewer at the site location. The […]
