为解决传统沉井工法因下沉速度、深度、垂直度等控制精准度差，应用于滨海软土地区存在对周边环境产生不利影响的风险，依托上海市轨道交通13号线西延伸段幸乐路逃生井工程，在传统沉井工法基础上进行机械化、自动化、智能化革新，提出主动控制型装配式沉井ACPP工法（active control press-in prefabricated shaft）。该工法基于竖井结构负载与下沉推力双矢量稳定下沉力学控制机制，采用不排水下沉工艺。通过提拉-下压模式可自主切换的推进悬挂系统自适应稳定下压预制装配式井壁、主动控制型六自由度水下开挖系统全自动精细化取土、同步压注触变-静凝式减摩泥浆降低井壁摩阻力，结合集挖掘工况、下沉参数、井身姿态、环境监测于一体的“机+土+结构”协同共生虚拟挖掘数字孪生远程控制技术，实现滨海软土地区竖井结构精准稳定下沉。研究表明： 1）该工法使竖井下沉到位后底部高差小于1 mm，垂直度偏差小于1‰，最大土体深层水平位移均值为5.10 mm，最大地表沉降均值为4.81 mm。2）井壁坚实完整、线型笔挺、滴水不漏，施工效果远优于其他同类竖井工程。

Due to low control accuracy of sinking speed, depth, and verticality, conventional sinking method poses adverse impact on surrounding environment when applying in coastal soft soil regions. To address this issue, a case study is conducted on an escape shaft project on the Xingle road in the west extension of the Shanghai metro line 13, and mechanized, automated, and intelligentized innovations are conducted based on conventional sinking method, proposing an active control press-in prefabricated shaft construction method. This method employs load and sinking thrust bivector stable sinking mechanism without dewatering operation. The prefabricated shaft walls are pressed in under propulsion and suspension system through hoist-pressin modes, the soil is automatically excavated by underwater excavation system with active control six degree of freedom, and the thixotropic-static antifriction slurry is synchronously grouted. A machine-soil-structure cooperative, virtual, digital, remote control technology integrating excavation conditions, sinking parameters, shaft posture, and environmental monitoring is achieved, realizing accurate and stable sinking of shaft structures in coastal soft soil regions. The results show that: (1) After the completion of the shaft sinking, the height difference at the bottom of the shaft is less than 1 mm, the vertical deviation is less than 1‰, the average maximum horizontal displacement of soil is 5.10 mm, and the maximum surface settlement is 4.81 mm. (2) The formed shaft is complete and straight without leakage, demonstrating superior construction effect than similar projects.