Transport for Buckinghamshire appointed Geobear to carry out work which will stabilise rocking slabs down a 500-metre section of the Tring Road. The busy route has been subject to many years of heavy goods vehicles travelling on the road. The increase in axle loads and the frequency of traffic has meant the slabs have settled in areas. The settlement has led to instability and differential movement, leading to heavy vibration affecting local residents.
Geobear will be using their tried and tested ground stabilisation solution using one of their geopolymer materials. The material is injected beneath the slab as a liquid through small holes drilled across the bay. It reacts once in the ground to form an expanding geopolymer material that fills voids beneath the slabs and stabilises the areas.
The project is one example of the type of schemes Geobear’s infrastructure division delivers. Richard Holmes, MD of Geobear Infrastructure comments, “Our non-disruptive solution allows the road to be operational with traffic management in place, as opposed to full closure with bay replacement. The project is a perfect example of how our modern ground engineering solutions benefit the client, and importantly, the local community.”
Background A section of a busy dual carriageway, near a town in the south of England experienced ground instability, leading to subsidence and voids beneath the carriageway. The client required a comprehensive ground improvement plan to address these issues that were identified using Ground Penetrating Radar (GPR) and Dynamic Cone Penetration (DCP) tests. A solution […]
Read moreCase Study: Permeation Grouting for Flood Defence Scheme in Otley Project Overview Location: Otley, West Yorkshire Project: Flood Defence Scheme Client: Bam Nuttall Objective: To explore the incorporation of permeation grouting to effectively seal a 6m gap in the sheet piles, avoiding excavation and reducing risks to a historic bridge. Background The flood defence structure […]
Read moreTreatment of Suspected Softened Clays Below SW Wing Wall Project Overview The project involves the stabilisation of a bridge abutment wingwall and the treatment of suspected softened clays below the SW wing wall at the Boots Enterprise Zone in Nottingham. This intervention was necessary to ensure the structural integrity and longevity of the infrastructure. Scope […]
Read moreAt a site near Telford known as Jiggers Bank, the road had to be closed due to some serious land movement that had caused fractures to the road. As part of the work to repair the site, Geobear was contracted to fill the voids and stabilise the arches beneath the road. This video, with input […]
Read moreProject Background/Issue Surrey Country Council was facing a significant challenge affecting a section of one of its roads, the A323. Surface undulation due to issues below ground had caused the asphalt to crack affecting traffic on the route. The road quality was gradually worsening and Surrey CC needed to find a solution that would not […]
Read moreBackground A section of road in a town in England had been experiencing frequent resurfacing needs due to problems with the soil beneath the concrete slabs. Water ingress had caused washout of fines in some areas, while weakened soils at depth had contributed to continued fracturing of the surface, affecting over 415 meters of single […]
Read moreA22 Vibration Control and reduction Working for East Sussex Highways, Geobear was contacted to address slab movement on a section of the A22. The joints between the concrete road slabs on part of the road in Lower Dicker were experiencing failure due to voiding under the joints (Figure 1). The voiding led to rocking […]
Read moreBackground A GPR survey carried out in advance of planned resurfacing works highlighted voiding below concrete pavement slabs on this section of the A55. The slabs lay beneath a 40mm thick layer of asphalt that was due to be planed off prior resurfacing. The resurfacing was scheduled to be carried out over two-weekend road closures […]
Read moreGeobear was contacted by J Brown Construction to provide an emergency solution for a project they were completing for Thames Water. The overall project scope was to replace a section of leaking water pipe beneath Hadley Green Road in Barnet. Over the decades, gradual degradation had led to the victorian era pipe cracking, which resulted […]
Read moreClient: Bear Scotland The A83 is a major road in the south of Argyll and Bute in the Scottish Highlands. It runs from Tarbet, on the western shore of Loch Lomond, where it splits from the A82 to Campbeltown at the southern end of the Kintyre peninsula. A section of the A83 near Furnace has […]
Read moreKeeping disruption to a minimum is a major issue when deciding how best to carry out carriageway repairs. So, when Southampton City Council needed to stabilise concrete slabs on an approach to the city’s docks last month, it wanted a solution that would complete the job quickly and allow the road to remain open. By […]
Read moreClient: C A Blackwell Background The client had recently constructed an access road and bridge into a new enterprise zone on the outskirts of Nottingham. The water main running beneath the embankment and feeding in to the adjacent Boots factory fractured some time after the completion of the work causing a significant amount of damage […]
Read moreClient: bbmmjv Background The M61 is a busy motorway linking the M60 to the south of Bolton and the M6 just south of Preston. A ground improvement solution was required due to washout of abutment fill material caused by a fractured drainage pipe / valve. An area measuring 1.5 x 1.5m within the northbound hard […]
Read moreGeobear was contacted by WSP to provide a design solution for a voiding and ground improvement This project was emergency works within the footprint of the A14 Cambridge to Huntingdon Major Improvement scheme at the Junction 14 Girton Interchange. The affected section of the junction comprised a two-lane slip road section of motorway with cloverleaf […]
Read moreVIDEO: Geobear were recently appointed to deliver significant urgent works on the M11 slip roads with the A14. We worked with Interserve, WSP and Highways England to deliver the project. The video below describes the project:
Read moreAone+, the Asset Support Contractor for Area 12, contacted Geobear regarding a section of the A180 near Immingham. Over a 4 km stretch of the westbound carriageway concrete road slabs, some of which were up to 40 years old were suffering serious problems with settlement. Visual inspections highlighted 56 sinking slabs of up to 30mm […]
Read moreStabilisation of A-road in the South East of England Geobear were recently contracted to deliver ground stabilisation works to a key A road in South East England. Although the road is modern in construction, sections began to show signs of settlement and with the local county council keen to resurface they were concerned that any […]
Read moreThe River Ouse runs close to many of the roads in the Newland area of East Yorkshire, with sheet piled walls used to hold, or channel the water. One particular stretch was found to be leaking water from behind a sheet piled wall, the result of general aging, with water coming from both rain and […]
Read moreBackground Several pavement defects were present on the eastbound and westbound dual carriageways in the vicinity of a pedestrian subway which passes underneath the A47 at junction 16. A ground investigation was undertaken along a 50m stretch of the carriageway to obtain data regarding the ground and ground water conditions at the site in order […]
Read moreFollowing a routine condition survey, Highways England identified a section of the A14 at Haughley that had uneven concrete slabs, which presented a potentially unsafe road surface and as such was subject to a larger pavement renewal scheme. The cause of the movement encountered was natural wear and tear but attributable to a combination of […]
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