Bit exchange technology for shield machines in long-distance and composite ground.
The "Sunrise Bit Method" is a technology used in shield construction that allows for the safe and efficient remote exchange of cutter bits during ultra-long-distance excavation, in complex ground conditions where bedrock appears, in ground with continuous large boulders, or in ground where ground improvement is difficult. It is equipped with a rotating body that has multiple cutter bits within the spokes of the shield machine. The exchange is performed by rotating it with hydraulic jacks. 【Advantages】 ■ Cutter bits can be exchanged safely without negatively impacting the construction schedule. ■ Exchanges can be performed in environments where human entry is not possible, such as when ground improvement is not feasible or under high water pressure. ■ It is also possible to differentiate between dedicated bits for direct cutting of temporary walls at the start of shield machine operation and for cutting obstacles. *For more details, please download the PDF or contact us.
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【Overview】 ■ A rotating body equipped with multiple cutter bits is installed inside the shield machine's spokes, and replacement is performed by rotating it with a hydraulic jack. ■ Depending on the number of times cutter bit replacement is required, up to 8 reinforced shell bits can be equipped. ■ Since the rotation is performed using a hydraulic jack and ratchet gear, the replacement work can be carried out remotely from a safe location without the need for workers to enter the replacement area. *For more details, please download the PDF or contact us.
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Kumagai Gumi Co., Ltd. aims to build a rich relationship between people and the environment by exploring new values sought by people and the times in cities, urban areas, underwater, in mountainous regions, and in various life scenes, with flexible thinking and proactive action, while further honing its technological capabilities. Please feel free to contact us if you have any inquiries.