Dam liners, also known as HDPE Geomembrane Liners, are manufactured using high-grade polyethylene raw material, supplemented with special components like aromatic hydrocarbons to deter rodents from causing damage. These liners play a vital role in water conservation and preventing leakage into the ground, ensuring the integrity of dams. As an impermeable lining system, dam liners are essential for protecting water resources and maintaining the proper functioning of dams.
BPM Geomembrane specializes in providing turnkey solutions for custom flexible dam liners, catering to various sizes and thicknesses based on specific dam or reservoir lining requirements. Our comprehensive range of dam liners ensures effective water containment and long-term durability. Whether it’s for new dam construction or retrofitting existing structures, our dam liners offer reliable protection and help maintain water levels, reducing the risk of water loss and environmental damage.
1. Material Composition Considerations for Dam Liners
The selection process for flexible dam liners begins with understanding material properties at a molecular level. BPM Geomembrane specializes in formulating polymer blends that combine high-density polyethylene with specialized additives for enhanced performance. These formulations achieve an optimal balance between tensile strength and flexibility, crucial for withstanding hydraulic pressure while accommodating ground movement. The company’s proprietary resin compounds include UV stabilizers that provide extended service life in exposed applications, a critical factor for dam liners that may face decades of sunlight exposure.
2. Hydraulic Performance Parameters
Water retention efficiency depends on precise engineering of the liner’s hydraulic properties. BPM’s dam liners demonstrate exceptionally low permeability coefficients, typically measuring below 1×10-12 cm/s. This impermeability standard ensures minimal water loss through the liner itself. The company employs advanced extrusion techniques to create uniform thickness profiles across entire panels, eliminating weak points that could compromise hydraulic integrity. Their quality control protocols verify these characteristics through rigorous ASTM standardized testing before shipment.
3. Mechanical Strength Requirements
Dam liners must withstand substantial mechanical stresses from water pressure and installation conditions. BPM products meet demanding strength specifications with puncture resistance exceeding 500N and tensile strength over 25MPa. These performance metrics derive from carefully controlled manufacturing processes that optimize polymer chain orientation. The company offers various thickness options from 0.75mm to 2.5mm, allowing engineers to select the appropriate strength grade based on specific project requirements and safety factors.
Why Chose BPM Dam Liners for Earthen Dam Project
Project Background and Customer Concerns
The American customer initiated their earthen dam construction project in March 2018 with specific concerns about rodent infestation. These burrowing animals presented a genuine threat to the dam’s structural integrity, as they could potentially compromise containment systems through gnawing and tunneling activities. The project team recognized that conventional lining solutions might not adequately address this biological challenge, prompting their search for specialized protective measures.
Technical Solution Development
Our engineering team analyzed the rodent threat and developed a targeted solution using smooth geomembrane technology. We specifically recommended formulations containing aromatic hydrocarbon additives, which create an effective rodent deterrent system. These specialized compounds make the material unpalatable to rodents while maintaining all necessary hydraulic performance characteristics. The solution outperformed traditional PVC options in both pest resistance and long-term durability metrics.
Product Specification and Performance
For optimal performance in this application, we specified 1.5mm thickness ASTM Standard BPM Smooth HDPE geomembrane liners. This thickness provides the ideal balance between puncture resistance and flexibility for earthen dam applications. The selected material meets rigorous impermeability standards with permeability coefficients below 1×10-12 cm/s, while the smooth surface finish facilitates proper installation quality and inspection processes.
Commercial Agreement Process
Following technical evaluations, the customer demonstrated confidence in our solution by proceeding with the commercial agreement. The deposit payment marked the transition from consultation to project execution phase. This commitment reflected their satisfaction with both our technical proposal and commercial terms, establishing a foundation for ongoing collaboration throughout the project lifecycle.
Long-Term Value Proposition
Our solution delivers comprehensive protection that addresses both hydraulic performance and biological threats. The rodent-resistant formulation extends the dam’s service life by eliminating a common cause of liner compromise. This case demonstrates our capability to develop specialized solutions for unique project challenges, combining material science expertise with practical engineering knowledge to deliver reliable water containment systems.
Specifications of Dam Liners for Earthen Dam Project
- Total 1.5mm geomembrane quantity – 371,00m2
- Geomembrane specification – 7m*140m/roll
- Two 40HQ containers
About BPM
BPM had provided many types of effective and states of the art geomembranes, geotextile and other geosynthetics to over 36 countries. BPM is also providing professional design and installation service. OEM and ODM are also available. If you have any questions or inquiries, please contact us, we will reply as soon as possible.
