【摘要】 为满足富水软土地层深大竖井工程建设需求，解决城市密集区开挖建设大深度地下工程时常面临的周边建筑物密集、施工场地狭小、环境保护严苛等难题，在SOCS自动化沉井工法“水下开挖、压入下沉”和VSM下沉式机械化竖井掘进工法“井身预制、悬挂下沉”的基础上，结合顶管工艺“压注厚浆、孔口保压”关键技术，研发出一种主动控制型装配式沉井工法。该工法通过下压提拉双模系统稳定下压预制拼装井身，采用多自由度机械臂配合专用绞吸头水下全自动取土，并采用同步压注触变-静凝式减摩泥浆降低井壁摩阻力，结合集开挖工况、下沉参数、井身姿态、环境监测于一体的可视化智能控制系统联动控制沉井施工，实现富水软土地层中心城区竖井结构微扰动精准下沉。将该工法应用于上海轨道交通13号线西延伸幸乐路逃生井工程，现场实施效果良好，土体深层最大水平位移均值为5.10 mm，地表最大沉降均值为4.81 mm。更多还原

【Abstract】 To meet the construction demands of deep and large shafts in water-rich soft soil strata and address challenges such as dense surrounding buildings, limited construction sites, and stringent environmental protection requirements in the central urban area, a novel active-control press-in prefabricated shaft construction method was developed. This method integrates the "underwater excavation and press-in sinking" features of the SOCS method and the "shaft segment prefabrication and suspended sinking" characteristics of the VSM method with the key technologies of pipe-jacking, including "thick slurry injection and borehole pressure retention." The method employs the "press-in and lifting" dual-mode system for stable sinking of the prefabricated assembled shaft segment, utilizes a multi-degree-of-freedom robotic arm with a specialized cutter suction head for fully automated underwater soil excavation, and reduces shaft wall friction resistance by synchronously injecting thixotropic-static slurry. Furthermore, a comprehensive visualized intelligent control system integrates excavation conditions, sinking parameters,shaft posture, and environmental monitoring to achieve precise, micro-disturbance sinking of shaft structure in water-rich soft soil strata in the central urban area. This method was applied to the Xingle Road Escape Shaft project on the western extension of Shanghai Metro Line 13, achieving favorable results. The maximum average deep horizontal displacement of the soil was 5.10 mm, and the maximum average surface settlement was 4.81 mm.更多还原