HS2 Phase 1 is a new high-speed railway line in the UK spanning 225km from London to Birmingham. Contract Lot C1 as part of HS2 Phase 1 was awarded to ALIGN JV. This section includes 21.6 km of high-speed rail and features a viaduct, a twin-bored tunnel, engineering earthworks, two highway overbridges, one footbridge and a green overbridge.

The emblematic Colne Valley Viaduct is a 3.4km-long viaduct with approach embankments, from the Northolt Tunnel at the southern end of the Colne Valley Regional Park to the Chilterns at the northern edge. It is located in a diverse and continuously changing landscape of water bodies intertwined with woodlands, spanning major obstacles such as roads and a canal.

The Chiltern Tunnel comprises twin bored tunnels under an area of outstanding natural beauty, with each tunnel 16km long. It includes five intervention shafts, four of which are also ventilation shafts, along the line.

Rendel/Ingerop provided tender, scheme, detailed design and construction phase support to the Design-and-Build Construction Joint Venture ALIGN JV.

The Geneva International Airport has decided to modernize its facilities with a major enlargement of its “East Wing” to improve passenger comfort.

This project includes a 500 m long metal building of with high environmental quality with two levels and is coupled with a new “processor” building dedicated to the control of incoming and outgoing passengers.

The whole piece consists of an exo metal structure covering a service road and a 20,000 m² public space.

The overall energy mix is balanced thanks to the mobilization of geothermal probes, some equipment with low energy consumption and a photovoltaic power generation of about 1,600 MWh / year.

In this context, the route of the access road to the terminal from France (customs road) will be amended and this road partially buried.

The consortium including Rogers Stirck Harbour et Partners / Atelier J. Bugna / Ingérop Conseil et Ingénierie (in association with consulting engineers from Geneva including T-Ingénierie) were awarded the contract further to an international tender.

As part of the road tunnel Safety measures, in accordance with Circular 2000-63, DIRIF has entrusted INGEROP for design and work supervision for the safety of the Champigny sur Marne cut-and-cover tunnel. This mission follows the definition of the improvement programme and elements of the Safety Dossier in 2003-2004.

CHARACTERISTICS

• Urban tunnel with 2 unidirectional tubes of 750 m and 780 m, with 4 lanes and high traffic, on the A4 motorway
• Works with maintenance of the operation
• Co-activity with 4 other transverse construction management on the site (supervision overhaul, DAI video and physical closures, self-evacuation, radio, etc.)

Civil engineering works:

• Emergency exits and new safety and fire niches creation
• Facilities for disabled people
• N2 or N3 fire protection of structures and networks
• Redevelopment of technical rooms and ventilation plants

Equipment works:

• Resumption of High Voltage (HTA) distribution (new HTA link between substations), refurbishment of technical premises with modification of HTA switchboards and securing of Low Voltage.
• Renovation of the ventilation system (longitudinal system with accelerators in the south and semi-crosswise in the north)
• Complete overhaul of the lighting installations in the 2 tubes and installation of beaconing studs
• Redesign of the fire network

SIRIUS network routing

Complete overhaul of the Centralised Control Management (CTM), interfacing with the general overhaul programme for the supervision of the 22 Ile-de-France tunnels

Design of tunnel built by mining construction method

Carrying out the operation in a cofferdam per half side to maintain river navigation,

Sensitive environmental context (Gulf of Morbihan) requiring special monitoring by the Water Police and the Maritime Works Directorate.

The cross-border section of the Lyon-Turino railway line is a new railway line of about 67 km linking Saint Jean de Maurienne in France to Suze in Italy and Bussoleno where it connects to the historic Turino-Modane line. In particular, the line requires the excavation of a 57.5 km single-track twin-tube tunnel known as the “Montcenis base tunnel”.

On the French side, the civil engineering of the base tunnel is divided into 3 operational worksites.

The construction management of the 08-operating site, led by a consortium formed by Egis tunnels (leader)/ Ingérop/Alpina/Géodata, includes the construction of the following works:

• The construction of a site platform at Villard Clément at the head of the future French side
• Preparatory construction for access to the future tunnel head (high-level temporary lining, mass earthworks, special ground reinforcement work),
• Excavation and lining of the two tubes of the base tunnel and the linking galleries over about 3 km,
• The construction of a cut-and-cover tunnel about 140 m long at the connection between the entrance to the base tunnel and the cut-and-cover tunnel under the A43 motorway already constructed as part of another construction package,
• The construction of the networks and water drainage system at the tunnel exit, the backfilling and definitive site installations

Characteristics

• Multiple interfaces work with the existing (buildings, infrastructures, networks) and other construction sites of the project (construction civil engineering sites, processing of excavated materials)
• Carrying out additional geotechnical and topographical studies, ICPE (Classified facilities for Environmental protection) files

Assistance to the project owner for the LSE (Water Law) and CNPN (National Council for the Protection of Nature) files.

The Chilterns Tunnel is a 15.8km bored tunnel. There will be four vent shafts and one intervention shaft located along the proposed line of route – Chalfont St Peter, Chalfont St Giles, Amersham, Little Missenden and Chesham Road. Its southern portal is located near Maple Cross. Its site will also house a compound during construction with all material from the bored tunnel coming here to be treated prior to being used elsewhere along the line of route. The northern portal is adjacent to South Heath.

Rendel/Ingerop are responsible for developing and delivering the Scheme Design of the Civil Works in Stage 1 followed by the Detailed Design in Stage 2, for the Design-and-Build contractor, ALIGN. Align is comprised of the three Civil Contractors in Joint Venture (Bouygues Travaux Publics, Sir Robert McAlpine, Volkerstevin).

The services provided include design of the Colne Valley viaduct and other structural elements (e.g. abutments); design of associated approach embankments; geotechnical modelling, ground risk assessments and earthworks; soil-structure interaction analysis for piled foundations and earth-retaining structures; geological interpretation of GI data; development of ground models; highway designs for road diversions, realignments, new junctions, new access roads to compounds and transformer sites, highway scope definition, pavements, emergency hard standings, road drainage and vehicle swept path analysis;  track alignments; production of 2D drawings and 3D BIM models of the designs to meet the ultimate client’s BIM and data management requirements; Environmental assessments; hydraulic modelling for river realignments / diversions; acoustic modelling for the design of Noise Barriers.

Rendel, Ingerop’s UK subsidiary, provided Management Support Consultancy services, which included value engineering design to accelerate construction, on the US $2.9 billion Padma Multipurpose Bridge Project (PMBP).

Funded by the Government of Bangladesh, PMBP is a two-level, steel truss bridge with a four-lane highway on the upper level and provisions for a single-track railway on the lower level. The upper and lower levels act compositely with a reinforced concrete deck slab. The bridge has a total length of 6.15 kilometres and a width of 22 metres at upper deck level. As well as rail and road, the bridge carries utilities including a high pressure gas pipe and telecommunication lines. The project is considered one of the most challenging construction projects in the country’s history, as in response to very challenging foundation conditions, it features driven piles over 125m long.

It is the largest bridge in the Ganges-Brahmaputra-Meghna river basin, located approximately 40 kilometres southwest of Dhaka. It connects the south-western region to the rest of Bangladesh to encourage and facilitate economic growth through the transport of people, goods, natural gas and telecommunications.

In addition to the construction of the bridge itself, there is an elaborate system of associated road constructions including two toll plazas and bridge end facilities, a 13.6 kilometre, four-lane, dual carriageway approach road, culverts, small bridges, underpasses, service roads and service areas for residential accommodation. Complex riverbank protection/training works of 14 kilometres in length were also constructed. The social and environment impacts were carefully managed via the implementation of a Resettlement Action Plan (RAP).

Rendel provided Management Support Consultancy (MSC) which included project management of the entire scheme including contractual and commercial advice; engineering and technical support and advice; budgetary and financial management; quality control and assurance; advising on dispute settlement; and the implementation of the social safeguard plans (environment, resettlement, etc.).

Rendel also managed several specific supplementary engineering studies. These included re-detailing of the main bridge precast roadway deck slabs to improve the buildability and enhance longevity; and the design and implementation of a dehumidification system through the interior of the 6.15 kilometres truss main bridge in association with Ingerop, who modelled the completed assembled truss module using 3-D CFD.

Rendel also completed the original Padma River Crossing Pre-feasibility Study in 2000.

Rendel was responsible for the independent design checking, site supervision and contract administration following the FIDIC rules (Contract No. 2). We carried out an independent design check of all works including the main bridge and the approach viaduct to UK HA Standards (Category III) and Eurocodes as well as the checking of highway and M&E design.  Rendel supervised the construction using an experienced, site-based team supported by visiting expert advisors. This included ensuring that the design complied with the employer’s requirements and specified design criteria and that the works were constructed in accordance with the contract, which incorporated the FIDIC Conditions of contract for Plant and Design-Build (First Edition 1999).  Rendel was also responsible for supervision of the adjoining Bulgarian infrastructure works.

Applicable codes, standards and specifications:

FIDIC, EN, BS, HA DMRB (UK Highways Agency- Design Manual for Roads and Bridges), HA MCHW (UK Highways Agency -Manual of Contract Documents for Highway Works), UIC (International Union of Railways Standards)

The pioneering 30-year concession for Lekki-Epe Expressway Toll Road was Nigeria’s first ever Public Private Partnership (PPP) project. The project comprised the rehabilitation and upgrade of 49 kilometres of existing two-lane dual carriageway to a three-lane highway, the introduction of three toll plazas (with a maximum 22 lanes/plaza) and the construction of a new 20 kilometres-long highway along the south coast of the Epe peninsula.

Rendel, Ingerop’s UK subsidiary, provided a wide range of management, commercial and technical consultancy services for the engineering, procurement, construction and maintenance of the Lekki-Epe Expressway Toll Road Concession.

Rendel’s involvement included technical due diligence and audit, restructuring of the initial contract documents, strategic procurement advice and acting as concession manager and employer’s representative for the EPCM Toll Road Contract as well as engineer for the Toll Equipment Contract.