Our Solution

1.Industry Pain Points & Challenges The anti-seepage system in environmental engineering allows for meticulous attention to detail. Common technical challenges include: (1) Toxic leachate leakage: Traditional concrete or clay layers are prone to micro-cracks, allowing pollutants to seep into groundwater. (2) Chemical corrosion and aging: Waste is highly corrosive and accompanied by high temperatures, easily causing ordinary materials to become brittle and fail. (3) Slope instability and landslides: Landfill slopes are steep, and the friction between the anti-seepage material and the soil is insufficient, easily leading to overall slippage. (4) Complex construction environment: The open-air environment is subject to strong UV (ultraviolet) radiation, requiring extremely high weather resistance of materials.   2.System Solution Changfeng has constructed a “multi-layer composite seepage prevention system”: (1) Main seepage barrier: HDPE textured geomembrane is used, with the rough surface increasing the friction coefficient to ensure slope stability. (2) Secondary self-healing layer: Sodium bentonite waterproofing blanket (GCL) is laid, its water-swelling property providing a “self-healing” function, serving as a double guarantee. (3) Drainage and drainage layer: Composite drainage net or water storage and drainage board is used to quickly drain leachate, reducing pressure on the main membrane.   3.Core Advantages (1) Zero permeability standard: Changfeng HDPE geomembrane has a permeability coefficient of less than 1×10⁻¹³ cm/s, providing a near-absolute seepage barrier. (2) UV Resistance 50+ Years: Utilizing 100% virgin resin with added anti-aging agents, it guarantees a service life of over 50 years even under direct sunlight. (3) Slope Stability Improved by 60%: The textured surface design provides a significantly higher interfacial friction angle than smooth surfaces, supporting steeper slopes and increasing landfill capacity.   4.Case Studies & Related Products Typical Case: A 20,000㎡ landfill seepage prevention project in Bangladesh, achieving 100% groundwater protection.  

1.Industry Pain Points & Challenges In underground engineering and deep foundation pit construction, water pressure and geological conditions are the main hidden dangers: (1) Groundwater upwelling and leakage: High groundwater levels exert enormous buoyancy on basement floors, leading to severe dampness and leakage problems. (2) Risk of uneven settlement: Construction on soft silty soil foundations can easily cause the structure to tilt or crack. (3) Traditional drainage systems are prone to clogging: Traditional blind drains have poor filtration performance; once silt enters, they quickly become ineffective, resulting in poor drainage. -Difficulty in protecting the structural waterproofing layer: Crushed stones in the backfill soil can easily tear the waterproofing layer during mechanical construction.     2.System Solution Changfeng’s comprehensive solution, “Deep Constraint + Multi-dimensional Drainage,” includes: (1) Deep Foundation Reinforcement: Geocells are used to form a “raft” foundation in weak soil, transforming dispersed soil into a stable rigid platform through lateral constraint. (2) Building Exterior Wall/Floor Drainage: Capillary drainage plates or water-storage boards are laid to rapidly dissipate groundwater pressure through physical gaps. (3) High-efficiency underground space drainage matrix: A permanent, rapid water-drainage network is constructed in the underground space using plastic blind drains and rigid permeable pipes. (4) Foundation Waterproofing Protection: Sodium bentonite waterproofing blankets (GCL) are used to provide a water-swellable, “self-healing” waterproof layer, serving as the core barrier of the structure.   3. Core Advantages (1) 40% Increase in Foundation Bearing Capacity: Geocells significantly increase the effective modulus of weak soil layers, reducing building cracking caused by settlement. (2) Zero Water Accumulation and Drainage Efficiency: The capillary drainage structure combined with plastic blind drains achieves drainage speeds 3 times faster than traditional gravel blind drains, without scaling or clogging. (3) Easy Installation: Compared to concrete support, the geosynthetic solution improves construction efficiency by over 50%, greatly shortening the exposure time of deep foundation pits.   4.Case Studies & Related Products Typical Case: Jakarta Metro Foundation Pit Reinforcement and Underground Utility Tunnel Drainage Project, Indonesia.