地铁超深中间风井关键技术设计和研究

摘要

To solve the high risks in the design and construction of metro intermediate ventilation shaft, this paper analyzes the difficulties encountered in the design and construction of super-depth intermediate ventilation shaft with reference to the practices in the super-depth intermediate ventilation shaft of the river-crossing on Wuhan Metro line 4 and based on comparison of design schemes. The results show that the key technologies such as retaining structure, sealing and dewatering solutions and shielding process are proved successful to solve the high risks in the construction.%为解决地铁超深中间风井的设计和施工高风险问题，结合武汉地铁4号线越江区间超深中间风井，通过对超深中间风井设计方案的比选，分析超深中间风井设计和施工中的重难点，得出超深中间风井围护、止水降水方案、盾构穿越中间风井等关键技术的详细方案，成功解决超深风井的高风险问题。