Source: Global Network
The "Intelligent" manufacturing activates the engine of upgrading, and the "first machine" demonstrates the innovation capability. On June 8th, China's independently developed first domestically produced super-large diameter sinking vertical shaft tunnel boring machine "Er Gong Vertical Shield 1" was successfully launched at CCCC Tianhe. The overall technology of the equipment has reached an international advanced level and will be applied for the first time in the shield machine launch shaft and reception shaft construction of conventional energy projects, achieving full autonomous control throughout the construction process.
As an advanced vertical shaft tunnel boring equipment independently developed in China, "Er Gong Vertical Shield 1" has a total weight of 160 tons, equipped with a 1600 kW high-power drive system, adopts a fully sealed high-pressure design, with a maximum excavation depth of 100 meters and a rock breaking ability of 80 MPa. The equipment innovatively integrates functions such as excavation, slag removal, support, and guidance into one, adopts a vertically downward excavation mode, achieves underwater operation of the host through flooding construction techniques, and has intelligent variable diameter excavation capabilities within a diameter range of 10 to 18.4 meters. The equipment is equipped with advanced systems such as key component status monitoring, automatic guidance measurement, and intelligent auxiliary excavation, combined with a new generation of intelligent control systems, allowing operators to remotely monitor the equipment status in real-time and accurately adjust construction parameters, not only greatly improving construction efficiency and intelligence levels but also completely eliminating safety hazards of personnel working in hazardous environments.
Zhang Yang, director of the Vertical Shaft Special Equipment Department of CCCC Tianhe Design Institute, introduced that currently, the construction of shield launching shafts and receiving shafts basically adopts traditional pile driving or continuous wall construction methods underground, which are time-consuming and costly, and have a significant impact on the surrounding environment. Compared with the traditional manual sinking shaft construction method, using the "Er Gong Vertical Shield 1" sinking shaft operation can achieve unmanned operations below ground and fewer people on the surface, saving more than 50% of construction costs, with excavation speeds more than five times faster than traditional methods, effectively shortening the construction period, and having features such as wide applicability, small land occupation, high construction efficiency and safety, low cost, environmental friendliness, good vertical shaft forming quality, and less impact on surrounding buildings. "Er Gong Vertical Shield 1" uses full prefabricated segmental assembly and suspended sinking technology, achieving one-time formation of the vertical shaft, significantly improving the stability and forming quality of the shaft wall; the impact on ground settlement around can be controlled at the millimeter level; facing constantly changing geology during the excavation process, it has adaptability to complex geological conditions, can operate efficiently in weak soil, soft rock, and composite strata, with a maximum excavation speed of up to 5 meters per day after being put into use.
Yang Hui, deputy general manager and chief engineer of CCCC Tianhe, stated that the research and development team has not only successfully developed the "Er Gong Vertical Shield 1" super-large diameter vertical shaft tunnel boring machine but also constructed a full-system solution based on prefabricated vertical excavation technology, providing a brand-new approach for building shield machine launching shafts and receiving shafts in narrow spaces. This innovative achievement will not only become a benchmark case for China's deep underground space development but also provide a demonstration model for future underground engineering construction. The application of this equipment will significantly improve the quality of engineering excavation and construction techniques, optimize the working environment. Its pioneering technical routes and construction methods will provide new equipment support and new techniques for the development of underground spaces in multiple fields such as sponge city construction, underground smart garages, comprehensive corridors, and energy, water conservancy, mining, transportation, and other sectors.
Original article: https://www.toutiao.com/article/7513568264245740069/
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