Articles and News
COCIV – Radimero Gallery
In the construction site of the Radimero tunnel, a critical work for the realization of the project of the Third Railway Pass of the new Milan-Genoa line, the second TBM modified was started to allow the safe advancement in formations in which the presence of asbestos is locally expected. The start of the second TBM follows a positive test period with the first TBM used in the project, which allowed to test and fine-tune equipment and procedures. This is a pilot application in the world for this type of technology.
Algiers Metro – Line 1 – First puncture
SELI Overseas drilled the first station of the Line 1 project of the Algiers Metro. The 10.5 m TBM CREG TBM exceeded expectations on this first trip. SELI Overseas is continuing in its extraordinary effort to keep all its projects safe despite the COVID emergency still hitting hard in most countries. Special thanks go to the company’s staff and workers who made this first result possible. Finally, it should be noted the efficient collaboration with the Algerian company Cosider, general contractor for the entire metro line.
COCIV – Serravalle Tunnel
SELI Overseas completes the excavation of the first of the two tubes of the Serravalle tunnel, a critical work of the Terzo Valico railway project that will connect Genoa and its port with Milan and Europe. To carry out the work, EPB TBM excavation technology was used in geological areas at and beyond the normal limits of application. This required a great deal of industrial craftsmanship in the most critical steps, a skill for which SELI Overseas and its specialists are world- renowned.
New award
SELI Overseas signs a contract with Concessionaire Cepav 2 for the Lonato tunnel, a critical work on the Brescia-Verona high-speed railway line. The contract, worth more than €200 million, concerns the building of a twin-tube tunnel with a diameter of 10 m and a total length of 9,500 m (2×4,750) to be carried out using EPB TBMs. This new contract is in addition to the three high-speed tunnel contracts that SELI Overseas has in place for the construction of the Terzo Valico with the Concessionaire Cociv, and confirms SELI Overseas as the leading specialised company in Italy and worldwide in the construction of tunnels using mechanised excavation.
COVID-19 emergency
SELI Overseas, which has been at the forefront of worker health and safety for 70 years, is committed to the prevention of Coronavirus infection on its sites and in the areas where it operates, giving this goal top priority over all output-related and economic considerations.
Berger Point – New York – USA
The excavation phase with the TBM in its temporary configuration (pipe jacking) of the Bergen Outfall Tunnel was successfully completed. During the 130 m section, 10.5 m of daily progress was achieved.
Berger Point – New York – USA
On 29 July, Seli Overseas, together with its joint venture partners, began assembly operations of the TBM supplied by Herrenkencht for the excavation of the Outfall Replacement Tunnel in Babylon, New York. The TBM is scheduled to be lowered into the excavated shaft using the freezing technique and operations for pipe jacking, with operations to commence in the second week of August.
Corporate Communication
Seli Overseas has acquired the tunnel business belonging to Grandi Lavori Fincosit Spa. In addition to the technical and human resources, expertise, experience and track record of works performed, the branch includes approximately €400 million worth of works for the Serravalle and Val Lemme tunnel lots that are part of the HS/HC Milan-Genoa railway line (Terzo Valico). Corporate communication.
Corporate Communication
Please note that, as of 15 October 2018, SELI Overseas S.p.A. is controlled in usufruct by Salini Impregilo via SELI TUNNELING DENMARK ApS. The acquisition of SELI Overseas aims to strengthen the presence and commercial relationships in geographical areas of interest to the Salini-Impregilo Group, as well as acquire technical tunnelling expertise.
Contract Extension – Los Condores Project – Chile
Extension of the technical consultancy contract for excavation with two TBMs (the 1st TBM a double shield, the 2nd TBM a crossover) for the excavation of the adduction tunnel of the Los Condores Hydroelectric Project in Chile. The extension was agreed until July 2019 and for a total value of €700 (total contract value €2,500,000).
New award – COCIV – Italy
SELI OVERSEAS, in a temporary grouping of companies with TOTO, was awarded the tender by the COCIV Consortium for the “Cociv HS/HC section – Terzo Valico dei Giovi – Valico Section (Radimero)” project, which consists of the excavation of the Base Tunnels for a total length of about 7.2 km for each tube with two EPB TBMs.
SELI Overseas confirms its leadership in mechanised TBM excavation in Laos
On 18 March 2017, SELI Overseas completed the 11.4 km excavation of the Xe-Pian Xe-Namnoy tunnel in Laos. A Double Shield Universal TBM made by Terratec (Tasmania) measuring 5.84 m in diameter was used to build the tunnel in accordance with SELI Overseas specifications and concept design. The tunnel was completed three months ahead of the contractual schedule with record output exceeding 1,000 metres/month. The tunnel, lined with prefabricated hexagonal elements, is part of the Xe-Pian Xe-Namnoy hydroelectric plant. This mega project, carried out under an EPC contract (engineering, procurement, construction) by the Korean company SK E&C, will produce energy for Thailand and Laos. The complex geology of the project and the tight completion schedule required SELI Overseas to make use of its 67 years of experience in tunnelling as well as its technicians and specialists, known worldwide as the best teams for mechanised tunnel excavation.
New record
In June 2016, 824,438 metres of tunnel were excavated and lined at the Lao construction site for the Xe-Pian Xe-Namnoy hydroelectric project. The highest daily peak was 47 meters. The progress reached in June is 5438 metres compared to a total tunnel length of 11,455 metres. This leaves 6,017 metres to go.
End of excavation
On Sunday 1 May 2016, the TBM6 finished excavating the Doha Gold Line project tunnel at the Al Aziziyah portal with a maximum monthly output of 920 m, which can be considered a record for an EPB TBM. This TBM was the last to leave and the first to arrive! Drilling took place two months earlier than planned.
