在隧道施工中超大直径泥水盾构常面临气垫舱受排渣通道限制堵塞、排浆口受渣土粒径影响堵塞及泥浆循环系统配置不合理导致堵塞等滞排问题，以深圳春风隧道工程为例，对超大直径泥水盾构的泥浆循环系统展开研究。基于流体力学原理，进行超大直径泥水盾构泥浆循环系统关键参数计算，实现泥浆循环系统进排浆流量、管径、泵站的合理配置，提高泥浆循环系统对大粒径渣石、高流速泥浆的适应性。在理论研究的基础上，设计前舱直排掘进模式，降低开挖舱渣土滞排风险；设计主机段小循环模式，提高主机段携渣能力；应用主机段排渣分级破碎技术，避免大粒径渣石堵塞排渣口及排浆泵。经深圳春风隧道施工结果可知，本方法能够有效降低泥水舱、气垫舱、排渣口等关键部位渣土滞排风险。

During superlargediameter slurry shield tunneling, clogging problem is common in air cushion chamber due to discharge channel, slurry outlet due to muck size, and slurry circulation system due to unreasonable configuration. Accordingly, a case study is conducted on the Shenzhen Chunfeng tunnel project, and study is carried out on the slurry circulation system of a superlargediameter slurry shield. Based on the principle of fluid mechanics, the key parameters of the slurry circulation system of superlargediameter slurry shield are calculated, realizing reasonable configuration of slurry flow rate, pipe diameter, and pump station, and improving the adaptability of the slurry circulation system to the slurry with large particle size and high velocity. On the basis of theoretical research, the front gate direct mucking mode is designed to reduce the risk of delayed mucking, the main machine small cycle model is designed to improve the muck carrying capacity of main machine, and the classification crushing technology of main machine mucking is applied to prevent the large size of stone from blocking the discharge mouth and slurry pump. According to the construction results of Shenzhen Chunfeng tunnel, the method recommended can effectively reduce the risk of delayed mucking in key positions such as slurry chamber, air cushion chamber, and discharge port.