Static caisson construction at the Baosteel vortex pool project in Shanghai.
Engineering Service
Innovative Underground Construction Technologies
地下工程创新工艺与专项技术
Specialized underground construction methods and equipment for static caisson sinking, low-disturbance ground treatment and complex urban underground works where conventional methods face space, groundwater or environmental constraints.
面向常规工法受场地、地下水或周边环境限制的复杂地下工程，提供静压沉井、微扰动地基处理等专项工法与专用装备。
Supplied by Shanghai Tieneng Construction Engineering Co., Ltd.
Overview
Service overview
Tieneng develops construction methods, control systems and specialized equipment around engineering constraints that are difficult to address with conventional approaches. Technology development is linked with project implementation and field verification, with emphasis on disturbance control, construction precision, limited work space, groundwater conditions and protection of adjacent structures or operating facilities. Representative technologies include MCCS micro-disturbance linked-control static caisson sinking and dual-fluid rapid-setting micro-disturbance mixing piles.
铁能围绕常规工法难以解决的工程约束研发施工工法、控制系统和专用装备，并将技术研发与现场施工、工程验证结合，重点解决扰动控制、施工精度、场地受限、地下水以及邻近结构或运营设施保护等问题。代表技术包括 MCCS 微扰动联控静压沉井和双液速凝微扰动搅拌桩等。
Scope
Service scope
Key components that may be provided for relevant engineering scenarios.
- MCCS micro-disturbance linked-control static caisson sinking systems
- Dual-fluid rapid-setting micro-disturbance mixing piles
- Multidimensional sensing, active control and monitoring for specialized construction
- Project-specific design and adaptation of underground construction equipment
- Field trials, parameter verification and engineering application of proprietary methods
- MCCS 微扰动联控静压沉井系统
- 双液速凝微扰动搅拌桩
- 专项施工中的多维感知、主动控制与监测
- 地下施工装备的项目化设计与适配
- 自主工法的现场试验、参数验证及工程应用
Scenarios
Applicable project scenarios
Typical project conditions where this offering may be relevant.
- Static caisson construction for deep shafts, underground automated parking facilities and other deep underground structures
- Low-disturbance ground treatment near operating tunnels and sensitive structures
- Underground construction with restricted surface work space or difficult groundwater conditions
- Specialized works requiring active control, monitoring or dedicated equipment
- Technology verification and adaptation for non-standard underground engineering conditions
- 深井、地下立体停车库等地下结构的静压沉井施工
- 邻近运营隧道和敏感结构的微扰动地基处理
- 地面空间受限或地下水条件复杂的地下工程
- 需要主动控制、监测或专用装备的专项施工
- 非标准地下工程条件下的技术验证与适配
Offering Details
Technical Details & Applications
- MCCS static caisson sinking combines a sinking-force/reaction system, internal excavation, wall-friction reduction, multidimensional sensing and linked intelligent control. A soil plug formed inside the caisson is used to balance external water and earth pressure while active press-in control manages sinking attitude and disturbance.
- Dual-fluid rapid-setting micro-disturbance mixing piles are used where rapid strength development and low disturbance are required near operating tunnels or sensitive structures.
- Technology selection and parameter control are based on surrounding environment, groundwater, target deformation limits, available work space and construction sequence.
Selected Applications
- Jiuting Underground Automated Parking Facility, Shanghai: The six-level underground rectangular translation parking structure is approximately 60.9 m long and 21 m wide. Micro-disturbance static caisson sinking uses the internal soil plug to balance external water and earth pressure, together with systematic pressurization, intelligent control and composite sinking assistance to achieve high-precision sinking with limited environmental disturbance.
- Baosteel Vortex Pool Caisson, Shanghai: A circular reinforced-concrete caisson approximately 16 m in diameter and 25 m deep was constructed close to existing industrial foundations using static caisson sinking, with active press-in control and low-disturbance construction measures.
- Sanmen Road Underpass, Shanghai - Dual-Fluid Rapid-Setting Micro-Disturbance Mixing Piles: The excavation depth is about 8 m and the project is close to operating metro infrastructure where groundwater drawdown could cause tunnel deformation. The patented mixing-pile method was applied, with project testing indicating strength development to approximately the original-soil level within about four hours.
技术说明与应用案例
- MCCS 静压沉井由压沉动力与反力承载、井内开挖、井壁减摩、多维感知监测及智能联动控制等系统组成，并利用井内形成的土塞平衡外部水土压力，通过主动压入控制下沉姿态和周边扰动。
- 双液速凝微扰动搅拌桩适用于邻近运营隧道或敏感结构、对快速强度发展和低扰动有较高要求的场景。
- 专项技术选择与参数控制需结合周边环境、地下水、目标变形控制、可用施工空间及施工顺序。
代表性应用
- 上海九亭地下立体停车设施： 地下 6 层矩形平移车库，长 60.9 米，宽 21 米，采用微扰动静压沉井技术，利用井内土塞平衡外部水土压力，并通过系统化加压、智能化控制和复合型助沉，实现结构高精度下沉和环境微扰动。
- 上海宝钢旋流池沉井工程： 直径约 16 米、深度约 25 米的圆形钢筋混凝土沉井，邻近既有工业厂房基础，采用静压沉井法施工，通过主动压入控制和低扰动施工措施控制下沉过程及周边环境影响。
- 上海三门路下立交 - 双液速凝微扰动搅拌桩： 项目开挖深度约 8 米，邻近运营地铁，降水可能引起隧道变形，采用双液速凝微扰动搅拌桩；项目试验显示，该工艺约 4 小时即可达到接近原状土的强度水平。
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