快科技3月26日消息，據報導，The world's largest diameter EPB-double shield combined tunnel boring machine "Qiangji" independently developed in China rolled off the assembly line in Changsha, Hunan.This major achievement marks a new breakthrough in the field of tunnel boring equipment in China and demonstrates its strong scientific and technological strength.

future"Qiangji" will devote itself to the construction of the tunnel in the southern section of the follow-up western passage project of Hangjia Lake South Pai, and contribute to the smooth progress of this major water conservancy project.

"Qiangji" can be called the "Big Mac" among construction machinery, with a maximum excavation diameter of 350.0 meters, a total length of 0 meters, and a total weight of up to 0 tons. In the follow-up engineering operations, it will mainly undertake the excavation task of expanding the 0.0 km long water conveyance tunnel in the southern section of the follow-up western passage project of Hangjia Lake South Pai, and the maximum excavation depth of the tunnel is about 0 meters, which is extremely difficult to construct.

In the face of extremely complex conditions such as uneven soft and hard strata and alternating soft and hard strata, "Qiangjihao" innovatively adopted the dual-mode design of "earth pressure shield and double shield tunnel boring machine".

This ingenious design can flexibly respond to different formation conditions, creatively solve the world-class problems of complex ground excavation, greatly improve the overall construction efficiency of the tunnel boring machine, and provide a solid guarantee for the efficient progress of the project.

In addition, the "Qiangji" is also equipped with an intelligent tunneling system and an advanced geological prediction system.The intelligent tunneling system is like an experienced construction expert, which can accurately control various parameters in the tunneling process and achieve intelligent operation; The advanced geological prediction system can detect the geological conditions ahead in advance, further improve the intelligence and automation level of the roadheader, and effectively ensure the safety and progress of the construction.

It is worth mentioning that the expansion of the follow-up western passage project of Hangjia Lake South Drainage is of great significance, which is the deep tunnel drainage system project with the largest urban drainage scale, tunnel diameter and buried depth in China.

The main task of the project is to focus on flood control and drainage, while also taking into account the improvement of the water ecological environment. After the completion of the project, it will play multiple important roles, not only to further reduce the flood control pressure in the Taihu Lake Basin, build a solid line of defense for the flood control and drainage safety in the western part of Hangzhou, but also to build a safety barrier in the main urban area of Hangzhou, to provide a solid and reliable water security guarantee for promoting the high-quality development of the regional economy, and to the improvement of the regional ecological environment and sustainable economic and social development.