The OHL Group Magazine tecnoNº 90, June 2014 The Královo Pole tunnels, the key to improve traffic in Brno Terminal de Contenedores de Tenerife, a reference logistics platform in the Atlantic Design and construction of a copper treatment plant in Chile 1 4 The Královo Pole tunnels, the key to improve traffic in Brno Terminal de Contenedores de Tenerife, a reference logistics 14 platform in the Atlantic 24 Design and construction of a copper treatment plant in Chile tecno Revista del Grupo OHL Staff Editor: General Corporate Management. Coordinator: Communications and Image Service: Mar Santos ([email protected]), Marisa Gutiérrez Sánchez ([email protected]) and Lourdes Peiró ([email protected]). Collaborator: José María Sánchez Moreno ([email protected]). Edited by: Tomáš Just, José Ignacio Uriarte, Diego Sánchez and Jesús García Florén. Traslation: IBERTRAD OHL need not necessarily share the opinions given in this Magazine. Reproduction prohibited. All rights reserved/Tecno. Paseo de la Castellana, 259 - D. Torre Espacio - 28046 Madrid. Design, layout and production: Eventos y Sinergias, SL Legal deposit: M-31540-1991. 2 Editorial The OHL Group, which consolidated its presence in the Czech Republic more than ten years ago through its OHL ZS subsidiary, has executed the Královo Pole Tunnels in Brno. Construction of this infrastructure has involved, for the first time in this country, mining tunnelling methods, and the site is located to the north and northeast of the third ring road (VMO), as part of the city’s basic transportation system and road network in the Czech Republic. In Spain, OHL Concesiones holds a majority 65 % stake in the concessionaire Terminal de Contenedores de Tenerife S.A., (TCT). This logistics platform, used for import, export and transfer, is a reference in the Atlantic. It has a mooring line 700 metres (m) long, more than 16 m deep, and a surface area of 15 hectares. Its facilities and equipment, with operating capacity of 620,000 TEUs/year, are designed to service the most modern vessels. To end this issue, we would like to refer to the copper mineral treatment plant executed by OHL Industrial for Corporación Nacional del Cobre de Chile, Codelco. It includes the design, execution, exploitation, operation and maintenance, over a 36-month term, of an EPC (Engineering, Procurement & Construction) project: Integral grinding service, acid curing and on-site piling of oxides in the Ministro Hales mine, a field located 5 kilometres north of the city of Calama, in the Second Region of Antofagasta. The installation, with production capacity of more than 7,200,000 tons/year, offers a new semi-continuous piling system. Luis García-Linares General Corporate Manager 3 4 Interior of one of the tunnels of Královo Pole in Brno, Czech Republic. The tunnel was built using the mined tunnel excavation method, the first time this method was used in the Czech Republic The Královo Pole tunnels, the key to improve traffic in Brno The Královo Pole tunnels are located in the north and north- west sections of Brno’s third beltway (VMO) and are key elements in the city’s basic transportation system, as well as the highway network of the Czech Republic. The tunnels carry up to 25,000 vehicles every day and at rush hour, re- lieving traffic congestion in the city. In addition, once the VMO has been fully completed, the connections between internal and external traffic will be resolved, significantly improving traffic flow on the city’s internal roads. The project VMO Dobrovského B was executed in the city of Brno, in the area near the Žabovřesky and Královo Pole neighborhoods, which are densely populated and have an extensive network of underground services, as well as surface roads and sidewalks. The work mainly included the construction of two parallel tunnels, each with two lanes, and the Žabovřeská-Hradecká and Hradecká- Královopolská interchanges in the Žabovřesky neighborhood, and part of the Dobrovského-Svitavská radiála access 5 Interior of one of the tunnels of Královo Pole in Brno, Czech Republic. Brno Beltway, with roads in the Královo Pole neighborhood. Principal characteristics connections to the The Technology Center (TC) for the tunnels highway network. is located between Dobrovského and To undertake the work, the mined tunnel ex- Slovinská streets. cavation method was used for the first time, with a specific excavation distribution and support provided The monitoring of the impact generated by the by shotcrete rein- tunnel that was included in the project was forced by Hebres metal supports de- the most extensive applied in the Czech Republic signed and fabri- to that point cated specifically for the project. The project included the most extensive moni- toring of the impact generated by the tunnel excavation ever carried out in the Czech Re- public up to that point. The Královo Pole tunnel consists of two tubes: lTunnel I. This tunnel runs along the line of the Dobrovského and Veleslavínova streets and is 1,239 meters (m) long. lTunnel II: Part of the line follows Pešinova street. It is 1,261 m long and runs parallel to tube I. The maximum separation of the centerlines of the two tubes is 93 m. Both tunnels Diagram of a BRETEX truss (BTX), which combines BTX and HEB profiles. were designed for a single direction, but 6 allow traffic in both directions in case of emergency. The standard cross-section for traffic consists of an open width of 8.50 m between curbs, and two emergency sidewalks at least 1.15 m wide on both sides of the tube. The tunnel lining, including the floor is made up of reinforced concrete. A false ceiling was installed along almost the entire length of the tunnel to separate the traffic area from the ventilation duct (VZT) and was designed for the removal of smoke and contaminated air in case of fire or emergency. The roads and sidewalks are made of concrete, with the exception of the sections near the tunnel openings and on the surfaces of the roads entering and exiting, which are made of asphalt mix. Concreted plastic SITEL conduits were installed under the sidewalks, supplemented in some sections with corrugated tubes to protect cables. Inspection boxes are one-piece, with covers made of different materials, and the conduits that run under the sidewalks are connected by cable protection tubes that are run under the roadway and in the tunnel lining. Both tunnels have low-voltage (LV) distribu- Main fans located in the tion boards with 400/230 volt (V) connec- technology center above the tunnels. tions for installations and/or maintenance, Fire protection located in each SOS cabinet. Also, the VZT conduits that run above the false ceiling are systems equipped with lighting and 230V electrical outlets next to each intake valve. A DN 200 fire-protection system was installed There are four connection galleries (with in the tunnels. This is a closed water-fed circuit, fans) between the two tunnels for evacua- with hose connections located in openings in- tion situations, separated from the tunnels tegrated into the tunnel lining. Each tunnel has by a fire wall with a fire damper in order to twelve hose connections and water and other keep the gallery pressure higher than the liquids on the roadway are collected through pressure in the affected tunnel. The gallery slotted curbstones along the length of A DN 200 fire-protection system was installed in the the tunnels. In order to prevent tunnels. This is a closed water-fed circuit with hose the propagation of fires caused by flam- connections located in openings integrated into the mable liquids catch- tunnel lining drains were installed 50 meters apart. The conduits discharge to floors are equipped with multiple collectors liquid-collection tanks located at the low to hold the cables that connect the cables point of the tunnel, and each tank is equip- run along both tubes, with a total of three ped with two automatic pumps that drain the large electrical niches with distribution contents to the Ponávka II collector. boards. 7 Excavation work. Žabovřesky opening were used in the construction and the floor (west tunnel opening) of the opening is anchored at the sidewalls of the tunnel. The roof, including the cornice, was made with a continuous is anchored at Located in the Žabovřesky neighborhood, thereinforced-concrete slab anchored at the this opening was designed as a reinforced- top of the Milan walls. concrete framework structure. Milan walls The length of the opening at the tunnel centerline is 18 m. The Žabovřesky cut-and- cover tunnel connects to the permanent opening of the Two technology buildings are located above the tunnel. The ceilings of both tunnel roof and provide access to the VZT duct tubes have aerodynamic openings with four jet fans 1.40 m in diameter. They also share the VZT duct located above the false ceiling. It has a closed rectangular reinforced concrete structure with pressure-resistant sealed sheets used for waterproofing and in the duct. There are two technology buildings located above the tunnel roof that provide access to the VZT duct. Both buildings are one- piece structures that are partially integra- ted into the retaining walls. These house the low-voltage switchboards for the tech- nology installations and the indoor facili- ties are equipped with heating and venti- lation. Excavation method. 8 Two reinforced-concrete ramps were cons- tructed at the tunnel exit to connect to Žabovřeská street. These ramps are 203 and 237 m long with a minimum width and height of 9.20 m and 5.25 m. The technology buil- dings are not directly connected to the tun- nel, but rather are used in the organization and management of the tunnel traffic.