In some cases where subsidence has occurred due to failure of the foundation but the ground floor structure / concrete slab is still structurally complete, it is possible to relevel the floor by jacking it back up again. An example of this might be a shallow slab foundation sat on poorly consolidated ground. This is often a very cost effective method compared to demolition and rebuilding.
Before determining jacking as an option, Shire carefully assess the existing structure, ground conditions and site conditions. Once confirmed as a viable option and designs completed, piles are placed at specific locations, to specific depths, then jacking heads are then placed on top of the piles. The toe of the jacking head is carefully placed underneath the slab. The jacks are slowly lifted, one by one, whilst levels are monitored using laser equipment.
Once the floor / structure is jacked back up to level, the piles are permanently concreted in and the surrounding area is reinstated.
Structures can be lifted by as much as 50mm. While this process is ideal for single storey structures, in some instances, it is possible to jack up a 2-storey building using the same process. Shire have successfully used this method across the UK on a wide variety of structures.
Jacking Case studies
Our Other Services
Civil & Structural Engineering
Engineering Innovation is at the heart of our approach to structural engineering. Shire were formed during 1988 in the belief that many clients were dissatisfied with the traditional reactive response of some Engineers.Find out more
Shire have a vast array of in-house design skills and expertise. Our dedicated telecoms team are often driving a gold design standard in the industry for others to follow. Our commitment is to provide quality design in a proactive, forward-thinking way & quickly! Our services also include site surveying, building analysis, tower analysis and line of sight surveys.Find out more
Shire originally started the geotechnical service to provide our own engineers with information on site, while the structural surveys were being carried out. This allowed us to offer a reactive, rapid response to our clients as a ‘one-stop shop’ for Design, Investigation and Construction.Find out more
As Structural Engineers, we have worked with the Property Insurance sector since 1998. We conduct structural inspections, impact damage analysis, specialist investigations and root cause analysis. All of which is engineer-led using straightforward language. Our experienced engineers are also asked to conduct Expert Reports and Expert Witness Service for homeowners and clients alike.Find out more
Shire offer a specialist building repair service registered under the Safe Contractor Accreditation and the Contractors Health & Safety Assessments schemes. In conjunction with our inspection & investigation services, we can offer a full solution from initial cause analysis through to structural repair.Find out more
Research & Development
We love a challenge! We were first asked to find a solution for repairing terraced houses in the City of London that had restricted access but needed structural support. That was in 1998 and the Shire Pile was created. Since then the R&D team at Shire have developed more products with a focus on restricted access, concrete-free, easy to install, removable and recyclable for a wide variety of applications. And there are plenty more solutions on the way. Contact us if you have an engineering challenge we can help to solve.Find out more