Trades & Services : Civil Engineering News
Rye Group achieves carbon neutral status after switch to HVO Green D+ fuel

Rye Group achieves carbon neutral status after switch to HVO Green D+ fuel

Rye Group, a leading provider of demolition, remediation and ground and enabling works has achieved carbon neutral status, after switching from standard red diesel to HVO [Hydro-treated Vegetable Oil] Green D+ fuel. Rye Group adheres to its own Sustainable Standard philosophy, which encompasses Safety, People, Quality, Environment and Community to

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Barhale to install critical north London sewer reinforcement

Barhale to install critical north London sewer reinforcement

Barhale has been awarded a £4.5M contract by Thames Water to install a protective liner to minimise the impact of a third party tunnel boring machine on north London’s important Middle Level Two (ML2) Sewer. The protection liner to the ML2, part of Joseph Bazalgette’s transformative Victorian sewer system, will

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Emergency Water Line Repair for Major UK Power Company

Emergency Water Line Repair for Major UK Power Company

When E.ON Energy, a UK power company, identified internal corrosion to water cooling lines that serviced its Connah’s Quay gas-fired Power Station in Flintshire, North Wales it called on Fyfe FRP’s UK approved applicator, Construction Composites UK (CCUK), to carry out emergency repairs. The company’s design and maintenance team had

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Will Rudd completes Topgolf in Glasgow

Will Rudd completes Topgolf in Glasgow

Multi-award-winning engineering consultancy Will Rudd Davidson is nearing completion at Topgolf, a high-tech golfing experience, which is due to open its first complex in Glasgow. The company has been carrying out core civil and structural service, with the entertainment venue opening to the public imminently. Located on Duchess Place, just

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Winvic awarded emergency bridge repair project under national highways SDF

Winvic Construction Ltd, a leading main contractor that specialises in the design and delivery of multi-sector construction and civil engineering projects, has been given its first contract within National Highways’ new Scheme Delivery Framework (SDF). Routine investigations to the M62 Ouse Bridge, located between Goole and Howden in Yorkshire –

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Latest Issue
Issue 326 : Mar 2025

Trades : Civil Engineering News

Rye Group achieves carbon neutral status after switch to HVO Green D+ fuel

Rye Group achieves carbon neutral status after switch to HVO Green D+ fuel

Rye Group, a leading provider of demolition, remediation and ground and enabling works has achieved carbon neutral status, after switching from standard red diesel to HVO [Hydro-treated Vegetable Oil] Green D+ fuel. Rye Group adheres to its own Sustainable Standard philosophy, which encompasses Safety, People, Quality, Environment and Community to ensure all projects are delivered to the highest possible standards, while positively impacting its clients and society as a whole. As part of this Standard, the Group pledged in August 2021 to reduce carbon emissions from all site equipment by over 90% within the following two years. In working closely with national fuel and lubricant provider, New Era Fuels, Rye has successfully replaced the use of diesel fuel with HVO within all site plant and machinery, and across its entire fleet of company vehicles. As result, it has reduced its annual carbon emissions figure from 3,065 tonnes to 135 tonnes within just 12 months. This represents a reduction of over 92% in just one year, demonstrating what is possible with decisive action. To then obtain carbon neutral status, Rye Group offset the residual emissions via two VCS (Verified Carbon Standard) schemes that focus on forest protection in Brazil and Colombia, whilst addressing ten of the UN’s 17 Sustainable Development Goals. Discussing this impressive result, Simon Barlow, Managing Director of Rye Group, said: “When we launched our Sustainable Standard framework in 2020, we set out a clear vision to build on our existing recycling and reuse rates and to lead the demolition industry by example. The results of our latest carbon audit are just excellent and showcase what can be achieved with decisive and impactful changes, like the replacement of diesel with HVO fuel. We are delighted to have exceeded our initial emissions reduction timeframe by 12 months and to have already reached a carbon neutral status. We will now work hard to maintain this and hope to inspire other industry representatives to make this much needed and positive change.” Made of used cooking oil and supplemented with an organic additive, HVO reduces carbon emissions by 90% and NOx emissions by 30% when compared to diesel. New Era’s HVO Green D+ was chosen by Rye Group due to the sustainable nature of its production. The fuel is fully certified back to source to ISCC standards, in line with the Renewable Energy Directive. The first demolition contractor to roll out HVO across its fleet, Rye Group is at the forefront of the green agenda within the demolition and construction industry. In May 2022, it was awarded ‘Sustainability Champion’ at the prestigious NFDC Awards in recognition of its efforts in addressing climate change and taking a proactive approach to reducing carbon emissions. In November 2022 Rye Group also presented its experience of running carbon audits in demolition at the World Demolition Summit in Vienna, with the aim of encouraging other demolition organisations around the world to pursue a similar path. For more information, visit: https://www.ryegroup.co.uk

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Barhale to install critical north London sewer reinforcement

Barhale to install critical north London sewer reinforcement

Barhale has been awarded a £4.5M contract by Thames Water to install a protective liner to minimise the impact of a third party tunnel boring machine on north London’s important Middle Level Two (ML2) Sewer. The protection liner to the ML2, part of Joseph Bazalgette’s transformative Victorian sewer system, will see civil engineering and infrastructure specialist Barhale install a 75 metre length of non-structural liner. It will protect the 2 metre sewer while the Tunnel Boring Machines (TBMs) for HS2 pass beneath. The relining will take the form of a series of steel hoops installed at 600mm intervals internally to the existing sewer with additional supports and bracing added between. Access to install the liner will be provided by two shafts – one existing and one new. The latter will be constructed at a point where the route of HS2 will be in closest proximity to the sewer to optimise monitoring. The shaft will be constructed as a caisson but installed using underpinning from the collar rather than by jacking so avoiding pressure on the 19th Century, brick-constructed sewer. ML2 carries third party cables and additional measures have been put in place to ensure they are not disturbed. Steve Hills, Contracts Manager at Barhale, said that the work was an important measure. “The ML2 has been an important part of the capital’s infrastructure for more than one hundred years,” he said. “While it has more than stood the test of time, it is prudent to make sure that it is fully protected as HS2’s TBMs pass below. “Every element of these works has been carefully planned and designed so that there is the least impact on the sewer through construction and the maximum protection afforded for the future. “That design philosophy of minimising impact has also extended above ground where we have planned to minimise disruption as we negotiate an historic part of London around Regents Park.” Building, Design and Construction Magazine | The Choice of Industry Professionals

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Emergency Water Line Repair for Major UK Power Company

Emergency Water Line Repair for Major UK Power Company

When E.ON Energy, a UK power company, identified internal corrosion to water cooling lines that serviced its Connah’s Quay gas-fired Power Station in Flintshire, North Wales it called on Fyfe FRP’s UK approved applicator, Construction Composites UK (CCUK), to carry out emergency repairs. The company’s design and maintenance team had carried out internal surveys of the lines and learned that the concrete encased steel pipes were corroded internally to a point where an exposed section of the pipe, that sat above the ground was at risk of failing. The team understood that was a clear risk of failure if repairs were not immediate to the 900mm diameter cooling water lines. These lines are used to carry water from a nearby river to the condensers at the power plant. If left to fail the power plant would be forced to halt operations resulting in a lengthy disruption to the power supply of E.ON’s residential and business customers. The company would also be faced with a costly bill to replace the condenser lines all together. The corrosion was likely caused by decades of continuous use; for large diameter pipes made from steel, ductile iron, or concrete, corrosion can lead to deterioration – threatening the structural integrity of the networks. CCUK worked with E.ON’s technical team to design an external composite wrap system that was able to take the full pressure of the line should a fail occur. Using a combination of bidirectional and unidirectional composite Fyfe FRP strengthening system, an emergency repair was carried out. A section of the pipe was excavated to allow surface preparation including crack repair works to the host pipe and the formation of a smooth transition where pipe diameters reduced using specialist epoxy mortars. All works were carried out during planned shutdowns and each repair took days under reduced pressure without significantly affecting the running of the station. The power station now has a fully encapsulated high pressure repair, complete with UV stable coating in place, that is deigned to take the full water pressure within the line. CCUK’s Operations and Marketing Director, Jamie Dempster said: “Our specialist repairs team was called to survey the 900mm diameter cooling water pipes, owned by E.ON Energy. We quickly determined that Fyfe’s  carbon fibre strengthening system would be the quickest and simplest way to repair the pipes. “It took one week for our team to strengthen and restore the pipes, allowing them to regain their original structural integrity and continue normal function”. Jamie said the UK power and water industries are in need of innovative solutions which will provide structural strengthening, the upgrade of internal pressure capacity and a significant extension to the service-life of these structures. “Time and cost-effective technologies are required, while minimum disturbance and disruption of everyday operations during any repair work are necessary,” he added. Fyfe’s FRP system is extremely lightweight, versatile, and stronger than steel and being a carbon fibre product, it is environmentally friendly, making it a well-suited repair solution for the UK energy giant, whose ethos states “we’re taking action for climate”. Building, Design and Construction Magazine | The Choice of Industry Professionals

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Will Rudd completes Topgolf in Glasgow

Will Rudd completes Topgolf in Glasgow

Multi-award-winning engineering consultancy Will Rudd Davidson is nearing completion at Topgolf, a high-tech golfing experience, which is due to open its first complex in Glasgow. The company has been carrying out core civil and structural service, with the entertainment venue opening to the public imminently. Located on Duchess Place, just off the M74, the multi-level complex spans 45,000 sq ft and is seen as an integral part of the ongoing regeneration in the city’s east end. “It’s great to see this magnificent project now ready to open. I am incredibly proud of the team for all of their hard work in delivering what will likely be a popular leisure destination for people from all across Scotland and further afar,” said MJ O’Shaughnessy, Managing Director, Will Rudd Glasgow and Ireland. “Given the site’s complexities, it was really important that we worked closely with all of the design team and contractors to deliver what was required, especially in relation to the complex drainage network. For us, it was a great opportunity to showcase the broad range of skills Will Rudd has to offer and it is excellent to see it reach completion,” MJ added. The firm’s Glasgow division were able to utilise many of its in house specialisms at Topgolf, including their façade engineering and contractor design experience to deliver the project that includes a complex series of multiple façade types, ornate stairs design and curtain walling along with an intricate underground drainage network. Established in 1982, Will Rudd Davidson is a multi-award-winning engineering consultancy providing civil, structural and conservation engineering in the UK and Ireland. Operating from two practices in Glasgow and Edinburgh, the expert team delivers engineering and design services, working collaboratively with clients to deliver creative and innovative solutions across a range of sectors including conservation, energy and renewables, transportation and infrastructure, healthcare, and education, and residential and hospitality including large masterplanning developments. Building, Design and Construction Magazine | The Choice of Industry Professionals

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Land & Water launches What A Waste campaign as it leads the industry towards becoming Carbon Net Zero

Land & Water launches ‘What A Waste’ campaign as it leads the industry towards becoming carbon net zero

Studying accessible data from the 20 largest contractors in the UK, a shocking fact emerges that wastage in the construction and civil engineering industries falls between 30% and 38%. James Maclean, CEO of leading wet civil and environmental engineering firm Land & Water, has a driving passion to reduce this figure. As the firm looks to lead the civil engineering and construction industries in reducing their carbon footprint and become carbon net zero by 2030, he has launched a campaign “What a Waste”. James explains: “We all have the ability (at every level and within every role) to respond to waste and it’s time the industry took action in order to drive down our impacts and act with responsibility. Responsibility can be broken down into two words, response and ability and there are immediate changes we can all make.” Starting close to home by looking at its own company, Land & Water has identified eight key areas that can be tackled quickly by the sector in order to minimise time, energy and resources being wasted. These eight areas are: James Maclean says: “I’m appalled by the waste I see and what impact this is having on the environment. We need to open the dialogue of attacking waste to drive down the sector’s carbon footprint. “I just cannot understand why the construction industry seems happy to settle for net profit margins of 1-5% (data analysed from the 20 largest contractors in the UK’s published accounts), yet study after study shows the sector is hamstrung by inefficiencies of 30-38%. “At Land & Water, we pride ourselves on having conversations on anything that might make our business better which is why we’ve involved our whole team in identifying bad practices we undertake that create waste. “Our aim is to tackle these head on by putting the right solutions in place. We hope that by being honest to ourselves, showing warts and all, that this informs not only our company but our supply chain and other businesses within our sector. “It’s a really simple, triple bottom line behaviour…. Attacking wastage improves your profit, lowers your impact on the planet and makes for a happier more productive project.” James has filmed a series of videos exploring waste within Land & Water and the solutions it is putting in place to reduce its impacts and carbon footprint. The videos, which can be accessed by the public, have highlighted key impacts of waste and areas that need to be addressed: James continues, “Everyone in the construction process needs to accept their personal responsibility for planning their work effectively and using materials efficiently so we get things right the first time on projects, it breaks my heart to drive past major projects where there’s mountains to be done and people’s heads are down, looking at their phones…what a waste?”. The What a Waste videos can be accessed here: What a Waste introduction Damage and abuse Energy and fuel Planning and coordination People’s time Building, Design & Construction Magazine | The Choice of Industry Professionals

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Land & Water awarded the contract for A VAST Thames Water River Restoration project

Leading wet civil engineering firm Land & Water has been awarded a place on the framework contract for the Thames Water River CP0033 Restoration and associated works. This groundbreaking project will see the implementation of river restoration and fish passage, improving available habitats and resilience within rivers. Land & Water will develop small and large scale solutions to improve the waterways, mitigate the impact on the environment and enable Thames Water to meet regulatory requirements as part of the Water Industry National Environment Programme (WINEP). As part of the overhaul and improvement of the waterways, work will include weir removal or modifications, channel bed re-profiling, riverbank re-profiling and replacing banks with softer, natural options. Barriers to fish passage will also be overcome, with pass channels and other solutions such as rock ramps and in-channel gravel (to allow fish to lay their eggs). Having successfully worked on other environmentally sensitive sites, Land & Water is an expert at implementing ‘soft’ nature-based engineering solutions and is experienced in dealing with regulators and local communities. It has previously restored hundreds of miles of waterways throughout the UK for the Canal & River Trust, building solid working relationships with the Environment Agency, Natural England, land owners and local stakeholders. Fiona Moore, Divisional Business Manager, said: “We’re very excited to bring our wealth of experience to developing these projects over the coming years. “The result will be a transformation and improvement of the Thames Waterways, reducing the impact on the environment and meeting its obligations under the Water Framework Directive. “As custodians of the environment, it also ensures that we are safeguarding habitat for the flora and fauna for years to come.” Thames Water is the UK’s largest Water and Wastewater services provider, serving 15 million customers, supplying more than 2.6 billion litres of drinking water on average, per day to 9 million drinking water customers and recycling waste from 15 million people safely back to the environment. A key driver for the river restoration programme is to mitigate the impact from abstractions. However, the complexity of river systems means that reducing abstraction alone may not address all of the pressures in the impacted area, and therefore there needs to be improvements throughout the river environment. The scale of the framework will see the works varying from small local projects which can be delivered manually and with minimal mechanical input, through to larger scale schemes.

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Winvic awarded emergency bridge repair project under national highways SDF

Winvic Construction Ltd, a leading main contractor that specialises in the design and delivery of multi-sector construction and civil engineering projects, has been given its first contract within National Highways’ new Scheme Delivery Framework (SDF). Routine investigations to the M62 Ouse Bridge, located between Goole and Howden in Yorkshire – or between junctions 36 and 37 of the M62 – identified a partial failure of a joint on the eastbound carriageway. Therefore, Winvic has been appointed as one of the organisations on the SDF undertaking temporary and then permanent repairs on the structure and highway. It was discovered that increased vibration from traffic had started to damage the concrete under lane three and a bridge joint, which allows the carriageway to expand and contract with the weather. A contraflow was immediately put into place, reducing traffic on the eastbound carriage to one lane, to allow temporary works to begin, while a series of overnight road closures during the week commencing 13 June facilitated a second eastbound traffic lane to open on Saturday 18 June minimising disruption to road users. Winvic installed temporary metal bridging plates across parts of the eastbound carriageway, which enabled a further eastbound lane and the eastbound exit slip road at junction 37 to be reopened on Friday 8 July.   Winvic has employed its ‘one-team’ approach and is working closely with a number of National Highways project partners; Jacobs is designing the repairs, traffic management is being led by Amey and Winvic, along with specialist Contractor VSL, is heading the joint repair and replacement. Together the companies are currently working on the complex design process required to replace all eight joints across both carriageways towards a solution that reduces the need for full closures in the future as much as possible. Temporary bridging plates have been installed over the damaged bridge joints as a temporary mitigation measure, and a second set will be added this autumn. The two most critically damaged joints on the eastbound carriageway will be replaced by spring 2023 and the project will be fully complete in Autumn 2023. Winvic won its place on the National Highways SDF in September, along with 49 other contractors that will deliver £3.6 billion of road renewal works on England’s motorways and trunk roads over the next six years. Rob Cook, Winvic’s Director of Civils and Infrastructure, commented: “We have been working hard with National Highways and the Yorkshire North East region to mobilise the Scheme Delivery Framework since we were awarded our place on it in September, so we were able to mobilise rapidly on this project on the M62 Ouse Bridge to begin the necessary immediate temporary works. We put multiple interfaces in place with the National Highway team and the other project partners, so we could work as one-team, towards one-goal with safety as the ultimate priority. “The surfacing and bridging plate works have met programme expectations, meaning road users have been able to go back to using multiple carriageways and the programme is in place to install more plates this Autumn; while the priority always must be safety, it’s also crucial that disruptions to people’s journeys is minimised as quickly as possible and negate the need for full road closures as much as possible. Once the permanent solution has been fully designed and  fabricated, we will undertake these permanent works, facilitating the long-term safe use of the Ouse Bridge.”  Members of the public can keep up to date about the project and any related traffic disruption, by visiting https://nationalhighways.co.uk/our-work/yorkshire-and-north-east/m62-ouse-bridge/.  Phil Jepps, National Highways Programme Delivery Manager, added: “The temporary repair work around the bridge joint and the permanent replacement of all eight joints on the Ouse Bridge is a very complex project. To complete this as quickly, safely and effectively as possible, it’s important we work with outstanding partners who share our commitment to working towards the highest possible standards. We would like to thank Winvic and our other partners on the Scheme Delivery Framework for their ongoing support to keep traffic moving safely while completing the vital resurfacing and bridging plate work.” For more information on essential safety work taking place on Ouse Bridge, visit the National Highways dedicated web page for the bridge https://nationalhighways.co.uk/our-roads/yorkshire-and-north-east/m62-ouse-bridge/ or follow National Highways Yorkshire on Facebook. Winvic will be attending the Highways UK event at The NEC, Birmingham, on 2 and 3 of November 2022 – find them at exhibition stand number E6 or contact the firm to pre-book a meeting. For more information on Winvic, the company’s latest project news and job vacancies please visit www.winvic.co.uk. Join Winvic on social media – visit Twitter @WinvicLtd – and LinkedIn.  

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LAND & WATER IS AWARDED A PLACE IN THREE REGIONS ON THE NON COMPLEX, CANAL & RIVER TRUST CEC FRAMEWORK

Leading wet civil engineering firm, Land & Water has been awarded a place on the Non Complex, Canal & River Trust CEC Framework in three regions for a four year term. The regions are Wales and South West, London and South East and East Midlands. Land & Water has worked with Canal & River Trust for over 20 years now, as its official dredging contractor, and so this framework will see the firm extend its services to maintain the Trust’s 2,000 miles of canal networks. Lucy Lee, Contracts Manager at Land & Water, said: “We are thrilled to be expanding our relationship with the Canal & River Trust and supporting them across the different regions to maintain and enhance the 200 year old waterways. “We are already proudly responsible for the delivery of all dredging, vegetation clearance and associated minor ancillary civils whilst also being the charity’s contractor of choice for all moorings and marina development. “Land & Water prides itself on working collaboratively with clients to deliver sustainable solutions, as part of our drive to becoming carbon net zero, whilst protecting the environments we work within. We are very much looking forward to continuing to strengthen our relationship with the Canal & River Trust.” The framework will cover civil engineering and maintenance works to the canal networks including construction work, culverts, bridges, footpaths, weirs and reservoirs.

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Spencer Group to complete major refurbishment works on historic bridge ahead of 200th anniversary

Bridge works specialist Spencer Group has further strengthened its credentials after being selected to revitalise an historic crossing ahead of the structure’s 200th anniversary year. Spencer Group, which has carried out maintenance and repair works on some of the UK’s most iconic bridges, has been awarded a series of contracts for further major refurbishment works on the Menai Suspension Bridge as it approaches its bicentenary in 2026. The Grade I listed structure is the second oldest operational vehicular suspension bridge in the world. Opened in 1826, it crosses the Menai Strait between the island of Anglesey and mainland North Wales. The primary focus of the work includes a £1.5m restoration project to repaint the entire main span underdeck of the 417m-long bridge. Working on behalf of client UK Highways A55 Ltd, Hull-based Spencer Group has designed bespoke moving gantry platforms to enable its team to access the currently unreachable main span underdeck in order to shotblast, inspect and repaint the area. The works will begin once designs are complete and environmental approvals have been granted, as the Menai Strait is protected as a Special Site of Scientific Interest (SSSI) and a wetland area of international importance under the Ramsar Convention. In addition, Spencer Group has been appointed to strengthen the handrails of the pedestrian walkways on the approach spans to both sides of the bridge. Early designs and trials are underway as the team works with heritage organisations to ensure designs meet requirements in keeping with a Grade I listed structure. The works are targeted to be complete by late 2022. A further project will see Spencer Group replace the majority of the vertical road deck hangers, which suspend the deck from the main chains of the bridge. Due to run throughout summer 2023, the project is in the early design stages as the Spencer Group team assesses various methods for hanger replacement and off-site manufacture of specialist components. A fourth project will involve Spencer Group upgrading and improving the bridge’s street and decorative lighting, installing a more modern, efficient and environmentally friendly LED system. Survey work for the scheme was completed earlier this year and Spencer Group trialled illuminating the Anglesey arch of the bridge, with UK Highways A55 Ltd inviting key stakeholders and members of the local community to view the lighting and share their feedback. Spencer Group is now working with UK Highways A55 Ltd to develop and agree the final specification for the lighting project, which will begin later this year. While a completion date has yet to be agreed, the light installation phase will begin in 2023. The latest contract wins come after Spencer Group successfully completed a project to remove, replace and then resurface the footway panels on the approach spans on both sides of the bridge. Luke Fisher, Sector Lead for Bridges and Structures at Spencer Group, said: “We’re delighted to play a significant part in preparing the Menai Suspension Bridge for its 200th anniversary, supporting UK Highways A55 Ltd and their client, the Welsh Government, to ensure this remarkable structure looks its best for its bicentenary year and beyond. “UK Highways A55 Ltd identified that the bridge is suffering from corrosion and needs repainting. For the underdeck painting scheme, we designed the moving gantry platforms, which are unique to this project, and our industry-leading capabilities in this sector formed a significant part of the bid. “We’re proud to have been awarded these contracts and to be given the opportunity to further demonstrate our ability to find innovative solutions to complex challenges of this nature. “We’re also supporting the Menai Heritage Museum in Anglesey to raise awareness of both bridges over the Menai Strait, as well as the importance of civil engineering among local school pupils and college students. We’re giving talks and leading bridge walks to inspire the next generation.” Spencer Group also facilitated a successful visit from Ed McCann, President of the Institution of Civil Engineers (ICE), and Deborah Sims, former President of the Chartered Institution of Highways and Transportation (CIHT), to the Menai Suspension Bridge in July, enabling positive discussions about the current projects and the history of the bridge. Kerry Evans, Operations Manager for UK Highways A55 Ltd, said: “As we prepare for the 200th anniversary of this magnificent structure, a series of major maintenance projects are in development. “UK Highways A55 Ltd is looking forward to working with the team at Spencer Group again as we embark on the underdeck painting works and the replacement hanger project.” To find out more about Spencer Group’s bridges expertise visit www.thespencergroup.co.uk/our-work/bridges/

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SOCOTEC Monitoring Ensures Structural Integrity of Busy European Motorway During Tunnelling

SOCOTEC is one of the UK’s leading providers of testing, inspection and certification services, provides comprehensive solutions in the Infrastructure, Environment & Safety, Environmental Science and Building & Real Estate sectors. Founded in 1953, the company offers a wide range of services to assist and advise clients through every step of a project’s life cycle, from acquisition and planning all the way through to completion and analysis. ITM Monitoring was acquired by SOCOTEC in 2018, and has subsequently rebranded to become SOCOTEC Monitoring UK. With over 30 years’ civil engineering experience, SOCOTEC Monitoring UK is the trusted contractor in construction, rail, highways, utilities, mines and ports across the UK, specialising in the design, installation and data provision for geotechnical and structural monitoring systems. High Speed 2 (HS2) is a high-speed railway line currently under construction in the United Kingdom. As the country’s second purpose-built high-speed line (the first being HS1), HS2 Phase One will connect London and Birmingham with a dedicated high-speed track, increasing capacity on the network. There was a risk that the construction of HS2 could have had an impact to the M25 motorway, when the tunnelling machines passed underneath in summer 2021. National Highways (formerly Highways England), the government-owned company charged with operating, maintaining and improving motorways and major A roads in England, wanted to ensure that the structural integrity of the motorway was not compromised during the tunnelling construction phase of HS2. About the project The M25 is one of the busiest roads in Europe, carrying over 250,000 vehicles per day. In 2019, Align JV awarded a contract to SOCOTEC to conduct monitoring of the M25 motorway and surrounding assets during construction. A main part of HS2, the Central 1 (C1) Section that Align JV is delivering, includes the boring of two separate tunnels underneath the motorway itself. A vital stage of the construction process was the monitoring of the motorway and surrounding assets to track any shifts in the settlement of both clockwise and anti-clockwise carriageways, sheet pile walls, bridges and abutments, the central reservation and two gantries. SOCOTEC conducted a 12-month baseline monitoring programme before the TBM’s started the crossing on the M25. The monitoring started hourly, with MS60 MultiStations measuring prisms, patch scanning and industry-leading reflectorless measurements due to the wave form digitiser technology. The MS60 successfully managed to conduct patch scanning and reflectorless measurements through the traffic at peak hours on the M25. The results provided by SOCOTEC while using the MS60 instilled confidence in the project that the potential settlement caused by the tunnelling was within the set parameters of the predicted movement set out by the clients’ designers. Challenges As one of the busiest roads in Europe, access to the motorway was often restricted, with monitoring teams unable to access the road unless it was closed, along with bridges and other monitoring points being obstructed by heavy traffic. Automated patch scanning was therefore suggested to reduce the amount of time required for teams to spend on site, increasing efficiency and improving safety. Due to restricted access on the motorway, the ability to install physical monitoring points also proved to be an obstacle to SOCOTEC. Communication between the different monitoring points was initially difficult due to the inability to run network cables to certain areas. Implementation of SCCS solutions To accomplish these tasks, a geodetic monitoring solution was required, with the ability to conduct monitoring without requiring prisms in all locations. These solutions needed to be installed in such a way so as to not obstruct traffic. With this in mind, SOCOTEC reached out to SCCS Survey. Leica GeoMoS Monitors were suggested, which enabled SOCOTEC to automate the monitoring project and use the power of imagery to minimise visits to site. Leica Nova MS60 MultiStations, GeoMoS, allowed the automatic triggering of alerts if the predefined movement levels were reached. The solution also included AD12 – Self Levelling Tribrach, which could be programmed by GeoMoS Monitor to auto-level the instrument prior to any measurement cycle. This was especially useful, as the instruments were at elevated positions to provide optimal angles of instance to the monitoring locations. SCCS provided three MS60s fitted with LOC8 and a singular Leica Nova TM50 in total. The four total stations were communicated through an SCCS Comms Box using Leica Comgate 20’s. To complete the physical set-up, security cages were designed specifically in-house by SOCOTEC for all four total stations.  The MS60s and TM50 were mounted in secure cages on top of plinths (high enough so as to not obstruct motorway traffic), along with the automatic tribrach AD-12 for automatic levelling of the instruments. Voltmeters were installed at each instrument to ensure that power was being provided to each unit for charging. The monitoring project required not just sensors, software and power components, but also communication devices in the field. With all of these different components, installation would prove complex and challenging when trying to figure out how to set everything up and automate it to make it run 24/7. To overcome this challenge, SOCOTEC installed four SCCS Comms Boxes with Leica ComGate20s in the field and connected the four instruments to them. The configuration of all the devices was then performed remotely in one centralised view within the Leica GeoMoS monitoring project. This significantly sped up the configuration process and gave SOCOTEC an overview of all of their measurement cycles. An array of prisms was set up on top of the embankments, some of which served as control prisms outside the zone of interest (ZOI). Test patches were set up to scan over 20 metres, 40 metres and 60 metres, each with different obtuse angles of instance. Hourly scans were implemented from the start of the project, and once the TBM’s had passed, these were switched to three-hourly intervals to adhere to the post-construction monitoring phase. Each monitoring project has specific measurement and accuracy requirements. For this particular project, SOCOTEC used the powerful Leica GeoMoS software solution, which provided a highly flexible automated deformation monitoring system

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