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隧道挖掘过程中的困难和障碍不可避免,因此设备提供商经验丰富的现场支持服务就显得格外宝贵。土耳其Kargi水力发电工程的主要承建商——Gülermak公司,就是在罗宾斯公司现场支持服务人员的协助下战胜了施工初期的挑战。2012年初,施工方采用直径10 m的双护盾硬岩掘进机,在不利的地质条件下出发,仅掘进了80 m就陷入了坍塌围岩地层段。地质状况变化不定,硬岩地层和流动的土体交替出现,致使刀盘不得不多次停工自救。在前2 km的掘进过程中,一共挖掘了7条旁通隧道才让掘进机从坍塌的围岩中脱身。
Tunnel excavation difficulties and obstacles are inevitable, so the equipment provider experienced on-site support services is particularly valuable. Gülermak, the main contractor for the Turkish hydroelectric power project at Kargi, Turkey, beat the initial construction challenge with the help of Robins’ on-site support staff. In early 2012, the construction contractor used a double-shield tunneling machine with a diameter of 10 m. Under unfavorable geological conditions, only 80 m of excavation started to fall into the collapsed surrounding rock formation. Geological conditions change indefinitely, the hard rock formation and the flow of soil alternating, resulting in cutters have repeatedly shut down self-help. During the first 2 km of excavation, a total of seven bypass tunnels were excavated to allow the boring machine to get out of collapsed surrounding rock.