en.Wedoany.com Reported - On June 5, the "Greater Bay Area Xili" (CREC 1616), an ultra-large diameter slurry shield machine jointly developed by China Railway Tunnel Group and China Railway Engineering Equipment Group, both subsidiaries of China Railway Group Limited, rolled off the production line in Shunde, Guangdong. The equipment will be used for the construction of the new Shenzhen Xili Station and related projects, serving the development of the main hub of the Guangdong-Hong Kong-Macao Greater Bay Area.
The new Shenzhen Xili Station and related projects are key nodes in the national "Eight Vertical and Eight Horizontal" high-speed railway network. The Xili Tunnel is a core project ensuring the internal and external connection network of Xili Station and the overall operation of the station. Its shield tunneling section has a total length of approximately 4 kilometers, with a maximum burial depth of 75.8 meters. The tunnel route passes through weathered granite strata of varying strength and multiple deep weathering troughs, presenting complex geological conditions. It also undercrosses 21 important structures, including railways, highways, and subways, imposing extremely high requirements on the shield machine's pressure stabilization capability and settlement control.
To address challenges such as long-distance hard rock tunneling, fault fracture zone crossings, and high water pressure conditions, the R&D team equipped the "Greater Bay Area Xili" with multiple targeted designs, including a small-spacing, high-opening-rate atmospheric composite cutterhead, a high-pressure screw conveyor direct discharge system, and a zero-emission system. The cutterhead has a diameter of 13.9 meters, the machine body is 135 meters long, and the total weight is approximately 3,750 tons. Additionally, the equipment is fitted with innovative technologies such as an intelligent cutter wear detection system and a new multi-dimensional visualization system, enhancing the shield machine's level of intelligence.
The new Shenzhen Xili Station and related projects are one of Shenzhen's "five main and five auxiliary" railway passenger transport hubs. The plan includes introducing four high-speed railways—Ganzhou-Shenzhen, Shenzhen-Maoming, Shenzhen-Shanwei, and Shenzhen-Zhuhai—as well as multiple intercity railways and urban rail transit lines. Upon completion, the project will form a multi-level rail transit network of "4 high-speed railways + 2 intercity railways + 4 metro lines," making it the largest high-speed railway station and rail transit interchange station in Shenzhen. This is of great significance for Shenzhen's development as a national railway hub city and for enhancing the core engine function of the Guangdong-Hong Kong-Macao Greater Bay Area.
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