On July 23, the world's first green shield machine, "CREC 1237" was successfully launched in the Taormina Section of Sicily High-speed Railway Tunnel Project, Italy. This marked a new stage of high-end, intelligent, and green research and development of the China Railway Hi-Tech Industry in the field of tunnel boring machines, which strongly demonstrates the strength of China's high-end equipment manufacturing industry.
The high-speed railway tunnel project in Sicily, Italy, consists of two sections, of which "CREC 1237" is responsible for the excavation of the Taormina section, with a total length of 4.9 kilometers and a maximum buried depth of 200 meters, mainly through clay, sand, sandstone and other strata. In addition, the clay permeability in the stratum through which the equipment passes is very poor, and there are shallow buried sections that put forward strict requirements for the overall settlement control of the equipment.
"CREC 1237" green shield is a new type of shield equipment specially developed by China Railway Engineering Equipment Group under China Railway Hi-Tech Industry in response to overseas market demand and in combination with European standards. It is also the first shield machine in the industry to apply the green concept. The excavation diameter of the equipment is 9.16 meters, the length of the whole machine is 135 meters, and the total weight is about 1900 tons.
