Project Type: Small-Scale Irrigation Dam Anti-Seepage Reinforcement
Location: Cebu Province, Philippines
Scale: Dam crest length 280m, maximum height 15m, total anti-seepage area 5,200㎡ (covers dam body, spillway and reservoir bottom)
Core Demands: Solve the problem of water seepage in the old dam to improve water storage capacity; resist the erosion of rainwater and irrigation water; adapt to the local hilly terrain and possible foundation settlement; meet Philippine water conservancy engineering safety and environmental protection standards.
The project adopted our 2.5mm reinforced HDPE geomembrane, which fully complies with international water conservancy standards (ISO 9001:2015) and Philippine local dam engineering specifications. It is specially designed for dam anti-seepage scenarios with 5 key advantages:
Superior Anti-Seepage Performance: The permeability coefficient is as low as 1×10⁻¹⁴ cm/s, which can reduce water seepage loss of the dam by more than 99%, significantly improving the water storage efficiency of the reservoir.
Strong Erosion & Wear Resistance: It can resist the long-term scouring of high-speed water flow and the wear of sand and gravel in the water, and has no damage even under the impact of seasonal heavy rains in the Philippines.
Excellent Terrain Adaptability: With high tensile strength (≥30MPa) and ultra-high elongation at break (≥750%), it can closely fit the irregular surface of the dam body and adapt to slight foundation settlement without cracking.
Weather Resistance for Philippine Climate: Optimized UV-resistant formula, can withstand the strong ultraviolet radiation in the Philippines, and has good resistance to high temperature (up to 60℃) and humidity, with a service life of more than 35 years.
Customizable & Reliable Construction: We provide customized services for thickness (1.5-4.0mm) and width according to the dam's height, slope and water pressure. The hot-melt welding technology ensures that the weld seam strength is higher than the base material, with strong overall stability.
1. Dam Surface Treatment: Repair the cracks and potholes of the old dam body, level the slope and reservoir bottom, remove sharp objects (rocks, tree roots, steel bars), and compact the soil to ensure the base surface is flat and firm.
2. Protective Layer Laying: Lay a 8cm thick geotextile protective layer on the treated dam surface to avoid the geomembrane being punctured by sharp objects under the action of water pressure.
3. Geomembrane Laying & Welding: Lay the customized HDPE geomembrane from the bottom of the reservoir to the top of the dam, with an overlap width of ≥25cm. Use automatic double-track welding machines for large-area welding, and manual welding guns for edge corners and special parts. Conduct air pressure tests on weld seams one by one.
4. Quality Inspection & Acceptance: Conduct full-area leak detection (vacuum box method + water filling test) after construction. The anti-seepage qualification rate reaches 100%, and it passes the acceptance of the Philippine Department of Public Works and Highways (DPWH).
Water Storage Effect
After 18 months of operation, the dam's water seepage rate is less than 1%, the water storage capacity is increased by 45%, which effectively ensures the irrigation needs of 2,000 mu of farmland nearby.
Safety Performance
The dam body remains stable during the rainy season and typhoon season, with no leakage, collapse or other safety hazards, improving the overall safety level of the dam.
Comprehensive Benefit
Compared with the traditional concrete anti-seepage scheme, the construction cost is reduced by 35%, the construction period is shortened by 50%, and the later maintenance cost is almost zero, bringing long-term economic benefits to local agriculture.
Our HDPE geomembrane is widely used in various dam and water conservancy projects in the Philippines, including irrigation dams, small reservoirs, and flood control dams. Contact us now to get your free sample and a tailored solution that complies with Philippine local standards!
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