Heavy-Duty Floating Impermeable Containment Barriers & Baffle Walls: Advanced Hydraulic Isolation for Municipal Wastewater Treatment
Project Overview
As municipal water infrastructure expands across Cambodia, modern wastewater treatment plants (WWTP) and stormwater facilities demand engineered containment solutions that can withstand severe environmental exposure, shifting hydrological pressures, and fluctuating seasonal water tables.
YORN WIRE STEEL is proud to showcase our supply and technical fabrication of Heavy-Duty Floating Impermeable Containment Barriers (Baffle Walls) implemented for the Kampong Cham Wastewater and Drainage Subproject under the Fourth Greater Mekong Subregion (GMS) Corridor Towns Development Project (Ministry of Public Works and Transport / ADB Loan 3686-CAM).
Designed in collaboration with international engineering consultants and installed with leading construction partners, these specialized floating impermeable baffles ensure total hydraulic and biological separation between the municipal wastewater treatment wetland cells and adjacent municipal stormwater drainage corridors.
The Challenge: Dynamic Water Levels & Seasonal Hydraulic Reversal
In biological wetland polishing ponds, retaining effluent within designated secondary and tertiary treatment cells (Wetland Zones 1 & 2) is critical for effective natural treatment. However, tropical environments present severe hydraulic challenges:
- Fluctuating Water Tables: Pond operational levels vary dynamically from an expected minimum of +10.25 m, a normal operational level of +10.75 m, to wet-season peak volumes reaching +11.40 m – +12.00 m.
- Reversing Seasonal Pressure: During the dry season, positive pressure pushes outward toward the stormwater drainage channel. In the wet monsoon season, surging external stormwater creates reverse pressure against the containment barrier.
- Bottom Seal Integrity: Traditional civil dykes consume vast land areas and are prone to washouts. The floating barrier requires a 100% watertight seal across irregular pond bed contours without risking tears, scouring, or hydraulic bypass.
Technical Specifications & Engineering Design
Our supplied floating containment barriers were custom-engineered to meet stringent international standards (ASTM / FTMS) for a design lifespan exceeding 20 years in harsh municipal effluent environments:
| Parameter / Feature | Engineering Specification | Standard / Performance |
| Primary Membrane | 1.5 mm (60 mil nominal) Reinforced Flexible Polypropylene (FPP) Geomembrane | ASTM D-751 (Overall thickness 67 mil) |
| Fabric Tensile / Tear | Scrim-reinforced break strength 1.45 kN (325 lbf); Tear strength 0.45 kN (100 lbf) | ASTM D-751 / ASTM D-5884 |
| Environmental Durability | UV stabilized; resistant to environmental stress cracking; Xenon Arc 4,000 hrs | ASTM G26 & ASTM D1693 (Unaffected) |
| Flotation Element | 300mm X 300mm square closed-cell foam boom covered in heavy-duty yellow marine skin | Buoyancy 54kg/m |
| Bottom Ballast & Seal | Dual ballast lines: Heavy 13 mm galvanized steel chain at base pocket + secondary 8 mm chain load line (1.25 m above bottom) | Creates tight bottom seal and maintains curtain stability during low-water stages |
| Top Tension Assembly | Dual 8 mm HG / 304 Stainless Steel coated tension cables with marine aluminum universal connectors | 4,450 kg breaking strength |
| Seam Construction | Dual thermally bonded heat seals (peel adhesion 3.5 kN/m) | 100% Watertight integrity |
Multistage Anchoring Architecture
To accommodate a 1.75-meter operational water level variance while resisting wind drift, wave action, and cross-currents, the barrier utilizes a hybrid dual-plane mooring system:
- Fixed Cast-in-Situ Reinforced Concrete (RC) Piles:
- Concrete-filled steel sleeve piles (100mm to 300mm) and 300 X 300mm RC columns founded on 6.0m driven piles (bearing capacity 107kN/pile).
- Fitted with sliding HDPE abrasion sleeves (minimum PN2.5) to allow the barrier’s mooring rings to travel freely vertical with rising or receding water.
- Intermediate Flexible Mooring & Concrete Deadman Anchors:
- 38 submerged heavy concrete tire-cast anchors (100kg each) tethered with polypropylene / SS304 mooring lines to high-visibility spherical marker buoys.
- Ensures balanced lateral restraint to both sides, preventing boom deflection during seasonal hydraulic shifts.
Product Applications
- Municipal Wastewater Treatment Plants (WWTP): Lagoon compartmentalization, facultative pond baffle walls, polishing wetland routing, and sludge retention.
- Industrial & Mining Retention Ponds: Settling basin flow routing, tailing ponds, and sedimentation containment.
- Stormwater & Flood Defense Corridors: Silt curtain turbidity containment, oil and debris diversion, and canal overflow protection.
- Marine & Port Projects: Temporary or permanent turbidity barriers during dredging, reclamation, and subgrade stone-pitching works.
Why Choose YORN WIRE STEEL?
At YORN WIRE STEEL, we bridge high-specification civil engineering requirements with reliable material supply and field support across Cambodia. From reinforced polypropylene geomembranes, geotextile subgrade stabilization, and heavy gabion mattress revetments to custom floating boom assemblies, our products are engineered to comply with major international FIDIC and development bank (ADB/WB) quality standards.
