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伦敦酋比利干道延伸段隧道工程位于伦敦大桥和加拿大河旁。第105合同标的东面端线隧道将穿越伍尔维奇和雷丁地层,西面端线将穿越伦敦粘土地层。 这种地质状况要求承包商欧基/索勒坦奇合资公司寻求能应付这种地层并且施工效率高的土压平衡盾构。法国制造厂商FCB公司和英国多肯工程公司能提供这种掘进机,FCB公司的盾构技术是从日本川崎重工引进的。
London’s Billy Road Extension Tunnel is located next to the London Bridge and the Canadian River. The 105th Contract East-end tunnel will cross the Woolwich and Reading formations and the western end will cross the London clay formation. This geological condition requires that the contractor Ouji / Soltanci JV seek an earth pressure balance shield that can cope with this formation and be highly efficient in construction. This type of roadheader is available from French manufacturer FCB and British Dorken Engineering Corp. The shield technology from FCB is imported from KHI.