Construction site for active-cutting equal-diameter pipeline replacement beneath high-voltage facilities.
Engineering Service
Underground Pipeline Rehabilitation & Urban Renewal
地下管线及城市更新
Trenchless underground-pipeline renewal and urban-renewal construction using active-cutting equal-diameter replacement and pipe-bursting pullback diameter-expansion replacement to rehabilitate or upgrade existing pipelines with limited surface disruption.
面向既有地下管线更新与城市更新工程，采用主动切割等径管道置换、碎管顶拉扩径管道置换等非开挖工艺，在减少地面开挖和周边干扰的条件下完成旧管更新及管径扩容。
Supplied by Shanghai Tieneng Construction Engineering Co., Ltd.
Overview
Service overview
Tieneng provides trenchless rehabilitation and replacement of aging, damaged or capacity-limited underground pipelines in dense urban environments. The service is designed for locations where conventional open-cut replacement is constrained by traffic, existing buildings, utilities, operating facilities or limited construction space. Two representative methods are active-cutting equal-diameter pipeline replacement and pipe-bursting pullback diameter-expansion replacement. Equipment, work-shaft arrangement and pulling parameters are selected according to the existing pipe material, diameter, alignment, surrounding utilities and required replacement capacity.
铁能面向密集城区中老化、破损或输送能力不足的既有地下管线提供非开挖修复与置换服务，适用于交通、既有建筑、地下管线、运营设施或施工场地限制下不宜采用大面积开挖的更新工程。代表工艺包括主动切割等径管道置换和碎管顶拉扩径管道置换，并根据原管材质、管径、线路、周边管线及更新后的输送需求配置设备、工作井和牵引参数。
Scope
Service scope
Key components that may be provided for relevant engineering scenarios.
- Active-cutting equal-diameter pipeline replacement
- Pipe-bursting pullback diameter-expansion pipeline replacement
- Compact work-shaft arrangement and trenchless equipment installation
- Cutting, pulling, replacement-pipe installation and connection treatment
- Utility protection, traffic-maintenance measures and construction monitoring for constrained urban sites
- 主动切割等径管道置换
- 碎管顶拉扩径管道置换
- 小型工作井布置及非开挖设备安装
- 旧管切割或破碎、牵引、新管铺设及接口处理
- 受限城区施工中的地下管线保护、交通保通及施工监测
Scenarios
Applicable project scenarios
Typical project conditions where this offering may be relevant.
- Equal-diameter replacement of damaged or blocked water and sewer pipelines
- Diameter-expansion replacement where existing pipelines require capacity upgrades
- Pipeline renewal beneath urban roads, industrial facilities and operating infrastructure
- Trenchless construction where excavation is constrained by high-voltage facilities, utilities, traffic or surrounding buildings
- Underground-pipeline renewal as part of urban infrastructure upgrading and urban-renewal projects
- 破损、堵塞给排水管线的等径置换
- 既有管线输送能力不足时的扩径置换与管线扩容
- 城市道路、工业厂区及运营设施范围内的地下管线更新
- 受高压设施、地下管线、交通或周边建筑限制、不宜大面积开挖的管线工程
- 城市基础设施改造及城市更新中的地下管线更新工程
Offering Details
Technical Details & Applications
Active-Cutting Equal-Diameter Pipeline Replacement
A tapered cutting head equipped with active cutting blades cuts the existing pipe while a hollow hydraulic jack, guided drill rods and pulling system advance the equipment. Cutting and pulling are coordinated so that the replacement pipe is installed along the original alignment in the same operation.
Key characteristics include:
- Maintains the original pipeline diameter and designed conveyance capacity.
- Integrates cutting, jacking and pulling into a continuous replacement process.
- Reduces extensive road excavation and disturbance to surrounding traffic and facilities.
- Can be adapted to different pipe diameters, materials and constrained underground conditions.
Pipe-Bursting Pullback Diameter-Expansion Replacement
A compact high-torque replacement machine can be arranged through an existing inspection chamber or small work shaft. A large-diameter bursting/expansion head is connected to drill rods to break the existing pipe and enlarge the surrounding bore, while a new larger-diameter pipe is simultaneously pulled into position. The process combines old-pipe breaking, new-pipe installation and capacity expansion in one trenchless operation.
Key characteristics include:
- Enables simultaneous old-pipe removal and new-pipe installation without continuous open excavation.
- Reduces earthwork and is suited to dense urban environments.
- Can accommodate different pipe materials and diameters and adapt to complex ground conditions.
- Supports pipeline-capacity upgrades while reducing road-restoration work and construction duration.
Selected Application
- Shanghai Metro Fengbang Base - DN300 Sewer Equal-Diameter Replacement: A blocked DN300 sewer was replaced along the original alignment. The sewer crossed a DN2000 stormwater pipe with only about 200 mm vertical clearance, requiring controlled trenchless replacement and compact work shafts within an operating rail-transit facility.
技术说明与应用案例
主动切割等径管道置换工艺
采用带主动切割刀片的锥度钻头切割既有管道，配合穿心千斤顶、钻杆导向及牵引系统，在切削顶进过程中同步完成新管铺设，使新管沿原有管位完成等径更新。
主要特点包括：
- 保持原有管径及设计输送能力。
- 切割、顶进和牵引一体化组织，新旧管置换同步完成。
- 减少道路大面积开挖，对交通及周边设施干扰较小。
- 可根据不同管径、管材及受限地下条件进行设备和工艺适配。
碎管顶拉扩径管道置换工艺
可利用既有检查井或小型工作井布置轻量化大扭矩管道置换设备，通过钻杆连接大口径破碎扩径头，将既有管道破碎并同步扩大通道，同时牵引更大管径的新管就位，实现旧管破除、新管铺设和管线扩容一体化施工。
主要特点包括：
- 无需连续开挖，可同步完成旧管破除与新管铺设。
- 土方量小，适用于密集城区及场地受限环境。
- 可适配不同管材和管径，并根据复杂地层条件进行工艺调整。
- 在完成管线更新的同时实现扩容，可减少路面恢复工程并缩短施工周期。
代表性应用
- 上海地铁封浜基地 - DN300 污水管等径置换： DN300 污水管堵塞段沿原管位进行等径非开挖置换，原污水管与 DN2000 雨水管垂直交叉，净距仅约 200 毫米，需要在运营轨道交通设施内采用受控置换及小型工作井施工。
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