Build over subterranean infrastructure – reduce risks, increase potential

Build Over Sewers,
Pipelines & Tunnels
Underground structures are often recorded incorrectly on plans with manhole positions providing no guarantee of the true centre line. This can lead to catastrophic mistakes based on inaccurate assumptions.

Our specialist mapping solutions provide detailed and accurate survey data to facilitate build over consent and avoid costly delays.

Excavation & Earthworks
Excavations can often be seen as low risk and assumed to have no impact on subterranean infrastructure. Utilities and transport networks such as London Underground and other access tunnels can be impacted by even the most routine site works.

Infotec’s build over survey information facilitates safe excavation by defining precise working limits.

Asset Strike

Structural penetration can have a catastrophic effect on any project.

Pile strikes to critical sewers and other subterranean infrastructure can be avoided with the provision of advanced mapping and survey solutions provided by Infotec.

Near Miss…Or Was It?

Asset damage can occur indirectly and may not come to light until sometime later. Piles often pass close to major assets displacing surrounding sub-soil and applying detrimental loads onto the structure, resulting in a range of defects with potential for major consequences.

Our 3D survey solutions facilitate safe, close proximity works.

Build Safe, Stay Safe

Safety is paramount and early engagement will allow us to assist you in mitigating hazards associated with underground infrastructure. Our build over survey techniques are also focused on autonomous methods with the safety of our workforce in mind, whilst never compromising on quality.

Maximise Real Estate Potential

Land is expensive and land that cannot be developed can be a wasted investment. At Infotec, we deliver accurate and reliable build over survey information to ensure that clients are able to maximise their real estate potential by confidently building closer to critical underground assets.

Informed Design, First Time Success

It pays to get the right information first time. Infotec are renowned for delivering successful and reliable build over survey results in the most difficult of environments, often where others have failed. Let us assist you first time, avoiding project delays and ultimately saving you money.

Risk Mitigation

Risks come in various forms and some are not so easy to identify when building over subterranean infrastructure. Early engagement and planning coupled with comprehensive investigation is key to mitigating risks and enabling designers and developers to proceed with the minimum of disruption. Surprises are often unavoidable during a project, but the sooner you know, the easier and cheaper the solution.

Protection Against Claims

It is imperative for clients to protect themselves against future claims, particularly those which may have arisen due to a pre-existing defect. With more primitive survey and inspection methods (which may well satisfy immediate obligations from asset owners) there is an increased risk of missed information, particularly within larger structures. What may seem like an unnecessary additional expense now could turn out to be an invaluable insurance policy in the future.

Protection of Underground Assets

Avoid damage to critical underground utilities or buried structures and allow your proposed work to proceed safely. Piles are all too regularly driven through or far too close to sewers or tunnels with potentially catastrophic effect and at exorbitant remedial expense.

Future Proof Data

Sewers, tunnels and other underground assets are notoriously difficult to access and we are now able to capture more data than ever, so it makes financial sense to capture information that may not necessarily be needed immediately, but could become beneficial in the future, particularly with changing designs which generate changing risks. Capture more first time!

BIM Compliant

With the integration of Building Information Modelling (BIM) into project planning frameworks, our high-quality 3D data and modelling services are increasingly in demand. At Infotec, we have a range of 3D and modelling capabilities to support our 3D survey data capture services and we encourage clients to get in touch to find out more and discuss specific requirements for their build over projects.

Experts in build over surveys – 30 years of expertise underground

Build Safe, Stay Safe

Maximise Real Estate Potential

Informed Design, First Time Success

Risk Mitigation

Protection Against Claims

Protection of Underground Assets

Future Proof Data

BIM Compliant

Get in touch

Innovative solutions from Infotec

Obtaining build over consent for any project or development relies upon a robust and assured application. Infotec offer a range of solutions to best support your build over application and maximise your real estate potential.

Our pioneering solutions include gyroscopically tracked in-pipe LIDAR and 3D infrastructure point cloud modelling which provide unparalleled accuracy without the requirement for manned entry.

Infotec are multi award-winning underground survey experts and continually pioneer ground-breaking solutions within a challenging and unseen environment.

Case study: Redevelopment of London’s Old Street roundabout

The proposed redevelopment of Old Street roundabout was always going to be a challenging design and engineering project given its busy nature and complex underground infrastructure which included the London Underground Tube and Thames Water Trunk Sewer Networks.

Infotec were appointed by TfL/CVU as Utility Consultants to provide specialist surveys and expertise to mitigate the underground risks associated with this scheme.

Infotec were involved in delivering a package of underground utility mapping and associated investigation services including:

  • Preliminary Feasibility Inspections
  • Stats Acquisition and Desk Studies
  • Gyroscopic Alignment
  • Internal 3D LiDAR Scanning of live fast flowing Thames Water Trunk Sewers
  • PAS128 Surveys of other utilities
  • Specialist In-Pipe GPR and Coring Investigations

Ongoing consultancy was also provided by Infotec to support the client in mitigating the ongoing risks posed by the delicate web of underground utilities and structures.

Information from the various surveys and specialist investigations was collated in 3D format, allowing the client to proceed in confidence with designs using their BIM platforms. An extensive level of detailed underground survey information was collated and coordinated by Infotec, ensuring that the ongoing design and construction risks were mitigated as far as possible.

The subsequent redevelopment and pedestrianisation of this area will create a much more efficient and environmentally friendly flow of activity through this mixed use urban hub, with improved public spaces and safer access for pedestrians and cyclists whilst maintaining critical traffic flow through the city.


Case study: Mount Pleasant Post Office

Infotec were engaged to facilitate a build over survey for a redevelopment of one of London’s most prestigious landmark sites. Significant and critical Thames Water sewer and UKPN Cable Tunnels passing under the proposed prime residential development site, required precise positional information to prove the viability of the proposed project design.

Infotec delivered full 3D infrastructure mapping data for the site using their remote survey capabilities. The site was subsequently purchased from Royal Mail and plans are now to extend the development with the purchase of adjacent sites already being considered.

“Thanks to Infotec and the expertise in build over surveys, our planned development of the former ‘Mount Pleasant Post Office’ was approved and build over consent was granted.”

Richard Hoile

The Livemore Partnership on behalf of Royal Mail

 


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