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A 450m long retained excavation to a maximum depth of 18m close to sensitive 3rd party assets will be constructed to house future HS2 tracks north of Euston station. Approximately…

Viaducts structures are assets adopted in High Speed Two (HS2) to minimise the impact of the railway on the existing motorways, watercourses, and other low-lying developments. The design of surface…

The HS2 Birmingham Interchange Station has been located to provide connections to multiple transport modes and routes. It is surrounded by major roads and situated close to Birmingham Airport and…

The Colne Valley Western Slopes (CVWS) is one of the largest and most significant environmental projects on the High Speed Two (HS2) Phase One route and represents a synthesis of…

An essential part of managing whole life carbon impacts of High Speed Two (HS2) Euston Station is quantifying, monitoring and reporting whole life carbon emissions through a Life Cycle Assessment…

The management and delivery of environmental surveys on a scale as large as High Speed Two (HS2) is an inherently complex challenge. Within HS2 Phase 2a, contractors have been working…

The investigation and accurate characterisation of weak rocks can be extremely challenging when fracturing and weathering creates difficulties in sampling and testing from boreholes. One such material is the Mercia…

High Speed Two (HS2) aims to re-use a minimum of 95% of soils generated by the scheme. This poses challenges for the re-use of potentially contaminated materials. In support of…

The High-Speed route joins the West Coast Main Line at Handsacre Junction just North of Lichfield, enabling HS2 Phase One services to continue North to Crewe and beyond. All High…

The High Speed Two (HS2) mainline crosses deep cuttings in Charmouth Mudstone. Deep excavations cause significant stress changes in the ground which inevitably result in ground heave. However, there is…

EKFB-JV will build the Cut and Cover ‘Green Tunnels’ (GTs) as part of the Main Works Civils Contract (MWCC) for the central section of High Speed Two (HS2) Phase One.…

This paper focuses on a novel process maturity framework developed during the targeted improvement to the Integrated Design Review and Assurance (IDR&A) Process, by the Skanska Costain STRABAG (SCS) Joint…

The proposed 3.4km long Colne Valley Viaduct provides an excellent opportunity to review and optimise design methodologies for large diameter bored piles within Chalk. Whilst piles have been successfully designed…

The HS2 project is delivering built infrastructure and natural environments on an unparalleled scale. The project affords a once in a generation opportunity to deliver nationally significant infrastructure that will…

With over 21 million cubic metres of material (equivalent to 8,400 Olympic swimming pools) earmarked to be excavated and moved across the 90 km of the northern section of the…

HS2 tunnels will pass below an existing main line railway intersection bridge near Euston, known as Bridge 7, constructed in the early 20th century. An assessment of tunnelling induced ground…

The latest London Atmospheric Emissions Inventory published by the Greater London Authority, indicated that Non-Road Mobile Machinery (NRMM) is a significant source of air pollution. This poses health risks and…

Ground Movement Assessments (GMAs) involve analysing and mitigating the damage caused by construction related ground movement on strategic utilities, operational tunnels and historically important buildings. Gaining approval from owners of…

This paper describes the process of planning and managing completion and handover, in particular the importance of starting at the early stage of a contract, defining processes, requirements and deliverables…

We have worked extremely hard to create a collaborative relationship with HS2, ensuring continued focus on the needs of both delivery partner and HS2, and creating a common approach and…

Previously, the permit system was aligned to traditional construction sites or rural areas. The team had to adapt certain aspects of the process, to ensure work could be undertaken safely…

This is the first time that a Utilities contract has had a full temporary works design and inspection regime for our traditional fencing, which is usually Herras. The favoured method…

The EWC south programme of works was in a position where the majority of physical works were finished, but only a handful of projects were formally completed. In order to…

On the 24th March 2020, CSjv initially paused in response to the introduction of “lockdown” measures as a result of the COVID-19 pandemic. CSjv recommenced where safe to do so,…

This paper discusses lessons learnt on the Technical Assurance, Quality Assurance and Handover process discipline, based on key delivery experiences whilst working on the Enabling Works Contract (EWC) on the…

Following the extensive use of demolition curtains on the Costain Skanska joint venture (CSjv) High Speed Two (HS2) Enabling Works Contract (EWC) South, a guidance document has been produced with…

Costain Skanska joint venture (CSjv) were instructed to undertake the works at the St James Garden (SJG), where the team designed and erected a unique and fully encapsulated mobile scaffold…

On High Speed Two (HS2), the contractor is responsible for ensuring that the Contract and Works Information requirements are followed. Part of these requirements is to deliver a completely self-assured…

The learning legacy of this activity is that collaborative working with relevant local authority and transport partners is now an expectation set out by HS2 for all contractors operating in…

The HS2 Phase 1 utilities portfolio consists of circa 5000 assets impacted by the line and route, defined as diversions, connections, protections, assurance, and removals. As an essential enabling activity…