Four prequalified joint ventures have been issued with tender documents for the public-private partnership (PPP) procurement of the Metro North tram link in Dublin. The project will involve construction of some twin tunnels of 6.7m diameter, spaced approx 7m apart, mostly in the centre of Dublin but also at the airport. The tunnels will be at least 20m deep, resulting in cover of 15m. There will also be a section of cut and cover tunnel construction. Boreholes of 20m-55m depth are to be sunk. The four JVs are: Cathro; Celtic Metro Group; Dublin Express Link; and, MetroExpress. The Cathro JV includes Strabag, and the Celtic Metro Group contains Grupo Soares da Costa and Obrascon Huarte Lain.
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机译：已为四个资格预审的合资企业颁发了招标文件，用于采购都柏林的Metro North电车线路的公私合营（PPP）。该项目将涉及建造一些直径6.7m的双隧道，相距约7m，主要在都柏林市中心，但也在机场。隧道的深度至少为20m，覆盖范围为15m。还将有一部分切入式隧道施工。深度为20m-55m的钻孔应下沉。四个合资企业为：Cathro；凯尔特地铁集团；都柏林快递链接；还有MetroExpress。卡斯罗合资公司包括Strabag，凯尔特地铁集团包括Grupo Soares da Costa和Obrascon Huarte Lain。
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