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About UsZHONGTAI HENGBANG Engineering Technology Co., Ltd. is located in the Academician Entrepreneurship Base of Tai'an National High-Tech Industrial Development Zone, Shandong Province. The company is a comprehensive service provider specializing in engineering consulting and design, materials R&D and manufacturing, as well as operations and maintenance. With strong technical expertise and robust R&D capabilities, its products are primarily applied in critical areas such as water conservancy infrastructure projects, transportation infrastructure initiatives, and environmental protection solutions for isolating and preventing leakage from urban waste and highly hazardous industrial solid waste.
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ProductsZHONGTAI HENGBANG Engineering Technology Co., Ltd. boasts production lines sourced from countries including Germany, Italy, Denmark, Belgium, and Switzerland, adhering to rigorous quality management systems and testing standards. We are equipped with advanced testing equipment capable of evaluating tensile strength, creep resistance, UV protection, water permeability, flame retardancy, antistatic properties, chemical corrosion resistance, and oxidation performance.
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Application CasesThe product is primarily used in hydraulic infrastructure projects, transportation infrastructure projects, and environmental protection applications—including the isolation and impermeability of municipal waste and highly hazardous industrial solid waste.
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BlogPrioritizing technological advancement and innovation, our company is committed to fulfilling user needs to the fullest extent possible.
The hospital's "protective suit"—Jiangxi HDPE Impermeable Membrane Construction Techniques!
Release date:
2020-09-29
During the pandemic, many hospitals hastily built temporary facilities to accommodate patients more quickly and efficiently. Yet when it came to wastewater treatment, there was nothing "temporary" about it: The systems operate in a fully enclosed manner, undergoing three-stage liquid chlorine disinfection before being pumped into the municipal sewage network. Beneath the entire site, HDPE anti-seepage membranes—standardized for use in landfills—are laid out like an impenetrable "protective suit." This ensures that rainwater is completely collected and thoroughly disinfected, preventing even a single drop of contaminated water from seeping into the ground!
The usage conditions and stress requirements dictate that the width of the anchoring groove should generally be no less than 0.5 to 1.0 meters, while its depth must also meet or exceed 0.5 to 1.0 meters. At the top of the anchoring groove, a specified amount of impermeable membrane should be预留 according to design specifications, in preparation for potential localized settlement and the resulting tensile stresses.
Jiangxi Yichun HDPE Liner Membrane It is a flexible waterproof material whose joints are joined using hot-melt welding, resulting in high weld strength and excellent welding performance. It boasts an exceptionally low permeability coefficient of 1 × 10⁻¹⁷ cm/s, ensuring superior resistance to seepage. This material exhibits outstanding thermal stability, capable of withstanding extreme temperatures ranging from a high of 110°C to a low of -70°C. Additionally, it demonstrates remarkable chemical resistance, easily enduring exposure to over 80 types of strong acids, alkalis, and other corrosive chemicals. Moreover, it features exceptional tensile strength, making it ideal for meeting the rigorous demands of high-standard engineering projects. Its robust weather resistance and exceptional anti-aging properties allow it to maintain its original performance even after prolonged outdoor exposure. Overall, this material delivers outstanding performance, combining high tensile strength with impressive elongation at break, enabling reliable use across a wide range of challenging geological and climatic conditions—including scenarios involving uneven ground settlement and significant strain forces.
Jiangxi Yichun HDPE Liner Membrane The connection is made using hot-melt welding, which creates a fully sealed, monolithic impermeable barrier by fusing the material itself. This method results in high weld strength and excellent welding performance. The process involves heating both sides of the geomembrane with an electric soldering iron built into the welding machine, causing the surface to melt. The upper and lower rollers then apply controlled pressure, firmly pressing the two layers of geomembrane together to achieve a strong, seamless bond.
Next, let's focus on elaborating further. Jiangxi Yichun HDPE Liner Membrane Construction process flow:
1. Substrate Preparation
1. Levelness: ±5 cm/m², ensuring the base surface is smooth and straight;
2. Compaction: At least 90%—only after compaction can the impermeable membrane be laid on top.
3. Longitudinal and Cross Slopes: The longitudinal and cross slopes should ideally be at least 2%;
4. Base surface cleaning: No sharp, pointed objects are allowed within a vertical depth of 2.5 cm.
2. Jiangxi Yichun HDPE Liner Membrane Laying and cutting
1. Jiangxi Yichun HDPE Liner Membrane Before laying, first inspect and measure the designated area. Based on these measurements, transport the appropriately sized impermeable membranes from the warehouse to the anchoring trench platform. During installation, adopt the convenient "push-lay" method—starting from the top and working downward—taking into account the actual site conditions.
2. Laying out Jiangxi Yichun HDPE Liner Membrane Efforts should be made to minimize welds, and while ensuring quality, prioritize the efficient use of raw materials.
3. When laying, start from the bottom and extend upward; avoid pulling it too tightly, leaving a 1.50% extra margin to accommodate localized settlement or stretching.
4. The longitudinal joints of two adjacent sheets should not align horizontally; instead, they must be staggered by at least 1 meter.
5. Vertical joints should be located at least 1.50 m away from the slope toe and bend points, and must be placed on a horizontal plane.
6. Stabilize the slope before working on the site foundation;
7. When laying the membrane on slopes, the unfolding direction should be roughly parallel to the line of maximum slope.
8. Jiangxi Yichun HDPE Liner Membrane After installation is complete, minimize walking on the membrane surface or moving tools across it. Any actions that could potentially affect Jiangxi Yichun HDPE Liner Membrane Objects that could cause damage should never be placed on or carried across the membrane to avoid accidental harm to it.
3. Jiangxi Yichun HDPE Liner Membrane Alignment and alignment properly
1. Jiangxi Yichun HDPE Liner Membrane Whether laid on a slope or at the base of the site, the surface should be smooth and straight, ensuring no wrinkles or ripples occur—this will help align and properly overlap the two sheets of geomembrane.
2. The lap width shall be as per design requirements, typically 10 cm on each side.
4. Jiangxi Yichun HDPE Liner Membrane Film-pressing shaping
1. Use sandbags to promptly align and neatly stack the items. Jiangxi Yichun HDPE Liner Membrane Secure it to prevent being blown or pulled around by the wind;
2. There are three methods for anchoring the geomembrane: trench anchoring, nail anchoring, and expansion bolt anchoring. In field construction, trench anchoring is typically used.
1) When using groove anchoring, depending on Jiangxi Yichun HDPE Liner Membrane The usage conditions and stress requirements dictate that the width of the anchoring groove should generally be no less than 0.5 to 1.0 meters, while its depth must also meet or exceed 0.5 to 1.0 meters. At the top of the anchoring groove, a specified amount of impermeable membrane should be预留 according to design specifications, in preparation for potential localized settlement and subsequent tensile stresses.
2) When using nail anchors, the width of the batten should be at least 2 cm, and its thickness must not be less than 2 mm. The spacing between nail anchors should not exceed 400 mm, and exposed areas of the batten must be treated with anti-corrosion measures.
3) When using expansion bolts for anchoring, the bolt diameter must be at least 4 mm, and the spacing between bolts should not exceed 0.5 mm. During construction, first temporarily secure the properly positioned membrane with prepared sandbags to prevent strong winds from shifting or displacing the HDPE membrane, and then proceed with the expansion bolt anchoring process.
5. Wipe away the dust
Wipe the weld overlap area with a clean gauze, ensuring it is free of water, dust, and contaminants.
6. Experimental Welding
1. Experimental welding at Jiangxi Yichun HDPE Liner Membrane Performed on the test specimen to inspect and adjust the welding equipment;
2. The trial weld was conducted under the same surface and environmental conditions as the production welds.
7. Productive Welding
1. Productive welding can only be carried out after trial welding has been completed;
2. At the weld seam Jiangxi Yichun HDPE Liner Membrane It should be welded into a single, cohesive unit, with no instances of cold welding, incomplete welds, or overwelding.
3. Whether it’s productive welding or experimental welding, the temperature and speed must be carefully maintained to ensure the weld achieves optimal results;
4. Use a welding torch only for repairs in areas where patching and double-seam welding machines cannot be used;
5. For routine maintenance of welding machinery, regularly clean out any residual materials from the welding equipment.
6. Jiangxi Yichun HDPE Liner Membrane Special treatment for welding-specific areas.
1) At slope intersections: Both laying and welding are special cases that require custom cutting based on the actual conditions, ensuring the geomembrane fits snugly against the dam slope foundation. Otherwise, it may lead to "hanging" or "bulging" phenomena.
2) At the intersection of the reservoir slope and the reservoir bottom: First, lay the impermeable membrane along the dam face, positioning it at least 1.5 meters away from the blind drain, and then connect it to the membrane on the reservoir bottom. For welding adjacent sections, complete the weld first, and then press the material into the blind drain.
8. Testing
Jiangxi Yichun HDPE Liner Membrane After welding, the following areas must be inspected: all welds, weld joints, areas where repairs were made due to damage, instances of missing or incomplete welds, re-welded areas after previous inspection failures, and locations that required additional re-welding.
9. Repair
When repairing areas that fail inspection, the repair material must cover an area at least twice the size of the damaged region. Welding torches can only be used for repairs in areas where a welding machine cannot operate effectively.
10. Protective Layer Construction
Jiangxi Yichun HDPE Liner Membrane After welding, the protective layer should be applied promptly to prevent direct sunlight from causing material degradation. When the slope is steep and unstable, making it difficult to lay down soil or a gravel-based protective layer, an alternative construction method—sprayed concrete protection—can be used. During sprayed concrete application, expansion joints must be installed according to design specifications, and the surface should be watered regularly to avoid cracking, which could compromise the protective effectiveness. If using plain soil or a sand cushion layer, ensure thorough compaction or incorporate other stabilizing materials to create a firm, cohesive covering that resists erosion from rainwater, thereby preventing the exposure of the underlying geomembrane.
11. The following requirements must be met during sheath installation:
1. Jiangxi Yichun HDPE Liner Membrane After the laying and welding have been approved, the protective layer should be promptly backfilled. The pace of backfilling the protective layer must match the speed at which the Jiangxi Yichun HDPE geomembrane is being laid.
2. The thickness of the protective layer should be at least 10 cm;
3. The material for the protective layer must meet design specifications and must not contain anything easily puncturable. Jiangxi Yichun HDPE Liner Membrane Sharp objects or debris.
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