In municipal engineering, manhole cover selection directly impacts urban safety and traffic flow. Hubei Road Middle Treasure's 700×900×150 ductile iron anti-settlement round cover is becoming the preferred choice for municipal projects and developers due to its exceptional technological innovation and reliable engineering performance.
With increasing urban traffic volume, traditional covers face growing problems such as settlement, noise, and displacement. Municipal authorities now demand higher performance—not just load-bearing capacity but also anti-settlement, noise reduction, and anti-theft capabilities.
Leveraging technical expertise and innovation, Hubei Road Middle Treasure Metal Products Co., Ltd. has developed the 700×900×150 ductile iron anti-settlement cover with unique design and production features that address multiple pain points in municipal construction.
Technological Innovation: Breakthroughs in Anti-Settlement Design
The cover employs an advanced anti-settlement design that intelligently separates the cover from the ring, allowing coordinated deformation with the road surface to prevent uneven settlement.
A wide-flange frame design integrates the cover with the road surface under external pressure, avoiding traditional issues of protruding or recessed covers and maintaining road flatness.
A unique buffer system (lower/upper buffer discs + springs) effectively absorbs vehicle impact forces, reducing direct pressure on the structure and significantly extending service life.
Materials Science: Superior Performance of Ductile Iron
High-quality ductile iron with precisely controlled nodularization ensures spheroidal graphite formation, dramatically enhancing mechanical properties.
Compared to standard cast iron, ductile iron offers higher strength (tensile strength ≥500MPa, yield strength ≥300MPa) and better toughness. Its mechanical properties approach those of steel at lower cost, providing excellent economic value.
Ductile iron also exhibits superior corrosion resistance, outperforming cast steel in most municipal environments (water, saline, steam) and ensuring long-term durability.
Construction Efficiency: Revolutionary Installation Advantages
Compared to traditional covers, this product significantly improves construction efficiency:
- Flexible asphalt mixtures can be used during manhole raising without curing time.
- Eliminates the need for rigid concrete and 3–7 day curing periods required by traditional methods.
- Reduces construction cycles and traffic disruption.
The installation process involves embedding a metal "jacket" into the road surface, placing the new cover, and compacting asphalt. The entire process takes ≈2 hours with immediate traffic reopening—achieving "trace-free operation" without additional curing.
Safety Performance: Comprehensive Protection Design
Integrated safety features include five key functions: anti-theft, anti-fall, anti-bounce, anti-displacement, and noise reduction.
Anti-theft design highlights:
- Stainless steel hinges and dedicated locks prevent theft while enabling authorized maintenance.
- Professional anti-slip surface design ensures traction in rain/snow.
- Precision cover-frame fit eliminates bounce and noise during vehicle passage.
Economic Performance: Lifecycle Cost Advantages
Although initial costs are higher than traditional covers, the 30+ year design life and low annual maintenance deliver long-term savings and sustainable benefits for urban management.
Maintenance comparison:
- Traditional covers require concrete breaking/recasting with traffic closure during curing.
- Anti-settlement covers only need asphalt repaving around the manhole, drastically reducing maintenance costs and traffic impact.
Ductile iron offers excellent performance at lower cost, with higher casting efficiency and reduced machining expenses for better economic returns.
Smart Features: Innovative Filter Alert Mechanism
The cover features an innovative filter alert system including:
- Connection frame
- Waterproof cone housing
- Support net
- Force sensor
This system detects waste accumulation in the manhole. When waste reaches a certain level, the force sensor detects mass changes and alerts maintenance personnel for timely cleaning.
This smart monitoring reduces maintenance difficulty, prevents drainage blockages, ensures system operation, and enhances urban management intelligence.
Practical Applications: Broad Market Recognition
The product has been successfully deployed in major projects, gaining widespread market acceptance. In June 2022, the company won a 1.32364 million RMB bid to supply anti-settlement covers and wide-flange grates for Yichang Municipal Public Facilities Management Office.
Similar covers were adopted in Jingmen City, with residents reporting: "The new covers are durable, slip-resistant in rain, and make travel safer!"
Differentiated Advantages vs. Competing Products
Key technical advantages:
- Adjustable anti-settlement mechanism (limit slots + blocks, nuts + bolts) for enhanced fixation.
- Advanced processes and strict QC ensure consistency versus small manufacturers.
- Higher load capacity and durability versus composite covers.
Although initial costs are higher, long-term economics and reliability make it ideal for municipal construction.
Conclusion
The success of Hubei Road Middle Treasure's 700×900×150 ductile iron anti-settlement cover stems from perfect integration of materials science, engineering technology, and practical application. Every step—from material selection to structural design, production to quality control—reflects deep understanding of performance needs and user requirements.
As urban infrastructure upgrades expand, choosing suppliers with strong technical support and project experience—like Road Middle Treasure—becomes crucial for public safety. This represents not just a product selection but a commitment to urban development.
Hubei Road Middle Treasure will continue to innovate, optimizing product performance to provide safer, more reliable, and durable solutions for urban infrastructure—guarding the "safety underfoot" for all citizens.