关键词: 综合管廊, 矩形盾构, 工程应用

Abstract: It is difficult to conduct rectangular shield tunneling mining construction of longdistance underground utility tunnel under complex engineering environment. It is an urgent need to speed up the key technology research and development of special equipment for rectangular shield tunneling of utility tunnel and promote the practice and application of rectangular shield tunneling technology in the field of utility tunnel engineering, thus maximizing the utilization rate of the internal space of the shield tunnel. Therefore, a scheme design research is conducted for the rectangular shield technology of the utility tunnel, and the shield segment, joint structure, auxiliary structure, internal partition wall, accessories, and nodes are designed. In addition, the shield construction scheme and key technical problems to be solved are explored, and a feasible technical scheme is proposed. Finally, a case study is conducted on the south extension project of the utility tunnel of Zhengzhou Binhe International New Town, the application scenario design and shield equipment mechanics design are conducted, and an effective solution that can be applied to engineering practice is provided. Through technical and economic comparisons, favorable conditions applicable to the rectangular shield of the utility tunnel are obtained, providing a scheme for saving the construction cost and shortening the period.

Key words: utility tunnel, rectangular shield, engineering application