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Ground Improvement at York St. John University

Ground Improvement at York St. John University Background York St. John University embarked on the second phase of converting its old sports hall into a functional space for academic and medical purposes. Phase one, completed two years prior, transformed two-thirds of the hall into classrooms. The ongoing phase aimed to repurpose the remaining area by […]

Ground Improvement on a major A road

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 […]

Chorley Tunnel Slab Track Lifting

A section of track at Chorley Tunnel in the northwest of England was subject to line speed restrictions due to subsidence. The section in question was at the end of the slab track running through the Chorley Tunnel, a line notable for its electrification scheme in the previous decade. The subsidence was caused by a […]

Rail Ballast Binding

Background The Glenn Douglas railway section, adjacent to a loch with a steep embankment, relied on a King Post retaining wall to hold the ballast in place. Over time, the wooden sleepers forming this wall deteriorated, leading to gaps that caused the ballast to erode down the embankment, jeopardizing track stability. Problem The primary issue […]

Subsidence Repair for Harrow Council

Subsidence Repair for Harrow Council – Saving £500k through a new approach to subsidence repair A block of flats with 12 units, owned and managed by Harrow Council, had suffered from structural movement due to the clay shrinking beneath the foundations. This resulted in cracks in the brickwork, internal walls and ceilings meaning it would […]

Permeation Grouting for Flood Defence Scheme in Otley

Case 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 […]

Tunstall Reservoir Void Fill

Tunstall Reservoir Void Fill Case Study Project Overview The client had a requirement at Tunstall Reservoir to fill a disused adit tunnel to prevent potential structural issues and ensure the long-term stability of the reservoir infrastructure. Geobear was commissioned to design a geopolymer injection solution to fill the difficult to access void. Project Scope and […]

Ground Improvement Works for Tynybryn Bridge

Tynybryn Bridge is one of the first Active Travel Bridges in South Wales to use a light-weight fibre reinforced polymer (FRP) deck solution with a localised ground improvement system of injected geopolymers to improve the ground bearing. Using Geobear geopolymer injection as a pre-construction activity rather than a post-remedial solution has not been used like […]

Bookham Wingwall Stabilisation

Bookham Road Underbridge Wingwall Stabilisation Project Project Overview Client: Dyer & Butler Location: Bookham Road Underbridge, Surrey Challenge A bridge wingwall in Bookham, Surrey had experienced movement and the client needed a fast non-disruptive solution to stabilise the asset. The site comprises a single-span underbridge (Bookham Road under rail) and is located immediately to the […]

Wing Wall Stabilisation in softened clay soil

Treatment 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 […]

Stabilisation of Ballasted Railway Level Crossing

Stabilisation of Ballasted Railway Level Crossing Project Overview Location and Background The project focuses on a ballasted railway level crossing located on the South West Mainline. The crossing is part of a high-speed rail line with a line speed of 100 miles per hour and accommodates approximately ten EMGTP (Equivalent Million Gross Tons per annum) […]

Void Filling Colt Cragg Reservoir

Project Overview Location: Colt Crag Reservoir, Hexham, Northumberland Client: Esh Group – Stantec Main Contractor: Northumberland Water Project Duration: 1 week Introduction Geobear was contracted to provide a void-filling solution for an abandoned spillway tunnel at Colt Crag Reservoir. This project required the use of a specialist geopolymer design, delivery team and equipment to ensure […]

Shipyard Ground improvement

Geopolymer Injection at the Dock: Ground Improvement to Facilitate Loads Overview A prestigious yacht manufacturer faced significant challenges at their dockyard. Accustomed to handling the increasing size and weight of super yachts, their facility began experiencing uneven sinking of concrete slabs due to water ingress and the subsequent softening of soils. This issue threatened the […]

Ground Improvement for Railway Arch Renovation

Ground improvement for railway arch renovation Background The project involved the ground improvement of four arches which were being converted into office storage spaces. The specific challenge at the site was addressing the inadequate foundation of walls that were initially constructed to block off the archways from neighbouring gardens. These walls, built directly on the […]

Stabilisation of Shildon Coal Drops

Stabilisation of Shildon Coal Drops Overview The Grade 2 listed Victorian-aged masonry retaining wall, known as Shildon Coal Drop, is located in the town of Shildon, County Durham. The retaining wall was originally used as a locomotive refuelling station and the Timothy Hackworth Museum Railway line runs along the toe of the retaining wall. Constructed […]

Stabilisation of Hurst Castle

Stabilisation of Hurst Castle using geopolymer injection solution Background Hurst Castle, located in Southern England, is a historic fortress with origins dating back to the reign of Henry VIII. Initially constructed as a coastal defence fortification, it underwent significant expansions during the Napoleonic Wars, transforming into a gun emplacement castle. This historical site faced a […]

Canal Towpath Void Filling and Water Sealing

Background The canal towpath void filling and water sealing project, aimed to address a critical infrastructure issue identified by the local council. The canal towpath in Cromford, a historic structure, was experiencing significant water leakage into the adjacent field. This leakage was not only a structural concern but also a potential environmental hazard, threatening the […]

Void Filling and Stabilisation at Jiggers Bank

At 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 […]

Viaduct void infilling

Geobear’s Innovative Solution for the Warford and Watercourse Viaduct This case study explores Geobear’s successful low-carbon intervention at the Warford and Watercourse Viaduct in Cheshire, Runcorn, a project commissioned by Network Rail. The primary challenge was to waterproof the viaduct spandrels and fill voids to prevent rainwater ingress without causing environmental harm to the underlying […]

Subsidence resolved at a property in Ireland

Subsidence in a Co. Wexford Property Executive Summary This case study examines the effective resolution of significant subsidence issues in a detached two-storey property in County Wexford, Ireland, utilising innovative Geobear solutions. Faced with extensive cracking in the structure, the homeowner sought a permanent and less disruptive solution than traditional concrete underpinning. Geobear’s approach, involving […]