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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.
What should be kept in mind when laying tunnel waterproofing sheets?
Release date:
2024-01-29
When laying the tunnel waterproofing panels, any protruding parts such as rebar mesh should first be cut off and then smoothed over with plain mortar. If there are protruding pipes, simply cut them off and fill the area evenly with mortar. For anchor rods with protruding sections, trim the screw heads flush by leaving a 5mm gap, then cap the exposed areas with plastic sleeves.
When laying the tunnel waterproofing sheets, keep the following points in mind to ensure the project meets quality and quantity standards.
1. When laying the tunnel waterproofing membrane, any protruding parts such as rebar mesh should first be cut off and then smoothed over with plain mortar.
2. When there are protruding pipes, after cutting them off, smooth the area with mortar.
3. When the anchor rod has protruding parts, after cutting off 5 mm beyond the screw head, finish with a plastic cap.
4. Apply additional shotcrete to ensure the surface is smooth and evenly rounded, with any unevenness not exceeding ±5 cm.
5. First, apply 350 g/m² of geotextile as a liner onto the concrete surface—do this simultaneously if drainage boards are present. Then, secure it firmly using a nail gun to drive cement nails into place, ensuring each nail is at least 50 mm long. Install an average of 3–4 anchor points per square meter at the arch crown, and 2–3 points per square meter along the sidewalls.
6. To prevent cement slurry from seeping into the geotextile, lay the geotextile first, then install the waterproof sheet.
7. When laying the EVA-ECB waterproof membrane, use a manual, specialized welding device to hot-melt it onto the liner. The bond's peel strength must not be less than the tensile strength of the waterproof membrane itself.
8. The EVAECB waterproof sheets shall be thermally bonded using a dedicated welding device, with the overlap area no less than 10 cm. Additionally, the bond's peel strength must exceed 80% of the base material's tensile strength.
9. The circumferential bonding areas of the EVAECB waterproofing sheets must be at least 1.0 meter away from the joints in the lining. Before laying the waterproofing layer, the sheets should not be stretched tight; instead, they must be closely adhered to the sprayed concrete surface without causing any tearing or cracking.
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ZHONGTAI HENGBANG Technology Co., Ltd.
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