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The demand for exploitation and utilization of underground space is more and more intense with the rapid development of cities in China. Domestic and foreign scholars have achieved fruitful results on the related construction technologies. However, the existing technology still has disadvantages. It is difficult to make construction safe and cost-effective in many situations. Based on the study of conventional construction methods and their advantages, combined with the development of underground engineering mechanization and prefabrication, this paper presents a structural cut-and-convert method of mechanized undercutting, which is called CC method and can be applied in large underground space construction, and has also been successfully put into practice. This paper focuses on the structural cut-and-convert method, steel and reinforced concrete composite structure, joint processing and other innovative contents. And corresponding improvements for the method are also made in this paper. Based on the characteristics of this new methods, the feasibility of applying the method to underground spaces with multi-layer, curve-shape, long-distance and prefabricated structures is discussed, and a new solution to the development of urban underground space is also provided in this paper.

Study on Structural Cut and Convert Method of Mechanical Undercutting in Large Underground Space