As cities continue to develop, their underground pipeline networks must also evolve to meet contemporary demands. Huafeng New Materials remains dedicated to addressing the challenges associated with the renewal and upgrading of urban underground pipelines. Through the use of continuous filament-wound glass fiber-reinforced polymer jacking pipes-referred to herein as replacement jacking pipes-combined with advanced installation techniques, the company delivers a reliable solution characterized by its minimally invasive, highly efficient, and durable attributes for urban pipeline network modernization.
01: Why Has Hwafeng New Material Replacement Pipe Jacking Become the Preferred Choice for Urban Organic Renewal?
Replacement pipe jacking typically comes in standard specifications of DN300 to DN600, with pipe sections measuring 0.5 meters per unit. For pipeline repair requirements involving DN800 to DN1500 diameters, our company can also develop customized solutions tailored to specific working conditions.
Engineered specifically for urban underground pipeline network renewal projects, Pipe Jacking Replacement (PJR) offers distinct advantages:
- **Lightweight and High Strength, More Efficient Jacking**: Its reduced weight facilitates transport, lowers the load on jacking equipment, and simplifies installation. Combined with the PJR construction methodology, project timelines are significantly shortened.
- **Corrosion Resistance and Extended Service Life**: Immune to rust and scaling, it demonstrates strong resistance to stormwater and sewage. With a service life of up to 100 years, a single replacement ensures long-term reliability.
- **Superior Hydraulic Performance**: The smooth internal surface enhances flow capacity, increasing conveyance efficiency by over 20% compared to conventional pipes.
- **Excellent Sealing Performance**: A gasketed sleeve joint design ensures tight connections between pipe sections, effectively preventing leakage.
02 Core Technology
Pipe Replacement Tunneling Method (Compound Jacking-Pulling Technique). In essence, the Pipe Replacement Tunneling Method constitutes a trenchless rehabilitation technique. Its core principle revolves around leveraging existing inspection shafts to replace aging pipelines in situ with new ones, achieving "old-to-new substitution and in-place renewal." This approach offers significantly abbreviated construction timelines and minimizes disruption to surface traffic and adjacent environments. Compared to conventional excavation and pipe replacement methods, it demonstrates transformative advantages.
• Trenchless technology, minimizing road excavation: By employing CCTV inspection technology to accurately locate defective pipe segments, small work pits are established at both ends of the repair section (typically occupying only a single lane), thereby minimizing disruption to traffic and residential activities. This approach is particularly suitable for densely populated urban core areas with complex pipeline networks.
• Segmental pipe jacking for precise replacement of aging pipelines: Utilizing pipe bursting or pipe cracking methods, the internal structure of deteriorated pipes is fragmented or severed. Concurrently, new replacement pipes are jacked in segments using the duplex jacking-pulling method, ensuring accurate substitution of the old pipeline and creating a completely new underground conduit.
• Reduced construction duration and lower overall costs: The segmental jacking method enhances construction efficiency, significantly shortens the project timeline, and reduces comprehensive expenses.
03 Engineering cases
Cases 1
Project Name: Non-Disturbance Replacement and Repair Project of Short Sewer Pipes in District-Owned and District-Managed Roads in Yuhang District
Project Introduction: This project involves upgrading the sewage pipeline on the north side of Liangping Street in Yuhang District to a DN300 replacement pipe by pipe jacking, addressing the issues of aging urban storm and sewage pipes and insufficient water flow capacity.
Case 2
Project Name: Emergency Non-Digging Repair Project of Sewer Pipe East of Gouzha Line, Palm Road, Yuhang District
Project Introduction: The original HDPE pipes have experienced settlement issues. The old urban area has heavy traffic and cannot be excavated. After discussion, Huafeng New Materials DN500 replacement pipe jacking was selected to completely update the underground pipeline network without excavation.
Case 3
Project Name: Organic Renewal Project of Underground Pipelines in Fuyang Urban Area
Project Introduction: This project is the first overall renewal project of an old urban area in Zhejiang Province. It adopts the double-layer top-pulling method for construction, truly demonstrating the advantages of pipe replacement without excavation, high efficiency and super durability of the pipe-jacking method.
Urban organic renewal requires the "strengthening and fortification" of underground pipe networks. The replacement pipe jacking technology of Huafeng New Materials perfectly meets the demands of "minimal disturbance and high efficiency" in urban organic renewal, safeguarding the development of cities.