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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.
[Technical Post] Detailed Explanation of Tunnel Waterproofing Structures and Construction Practices, Plus the Engineering Advantages of Yunnan Tunnel Waterproofing Membranes
Release date:
2020-10-21
Tunnel waterproofing is a comprehensive engineering project that integrates multiple disciplines, including engineering, sealing technology, and geology. The principles should closely align with the geological and hydrogeological conditions, the structural characteristics of the project, construction methods, as well as the intended use and operational requirements. Waterproofing design and construction must address the following key aspects:
1. The design follows the comprehensive management principle of "combining prevention, drainage, blockage control, and interception." By implementing a variety of measures, the goal is to ensure smooth drainage, reliable waterproofing, cost-effectiveness, and long-term durability—ultimately achieving optimal water protection.
2. The overall principle of waterproof design should prioritize prevention, employing multiple layers of defense, combining waterproofing methods, and adopting comprehensive management strategies.
3. The tunnel lining structure can utilize self-waterproofing concrete, treating it as a fundamental solution and establishing a permanent waterproof barrier to ensure complete impermeability. During construction, effective measures must be implemented to prevent the development of through-type cracks in the structure.
4. Expansion joints must be properly designed according to the specific characteristics of the project and its functional requirements, while construction joints should be determined through detailed analysis based on site-specific construction conditions. To minimize most of the shrinkage stresses in concrete, construction joints should be placed closely rather than sparsely. Additionally, enhanced waterproofing measures must be implemented at special areas such as expansion joints, construction joints, and wall-penetrating pipes. 5. The tunnel waterproofing membrane installation process must ensure that the waterproof layer achieves seamless, fully integrated sealing performance.
6. If the shallow-buried sections at the tunnel's entrance and exit are relatively long, with overlying layers consisting mostly of loose materials and the presence of surface topography that collects water, a surface drainage ditch can be installed above the tunnel roof, localized grouting can be applied to the ground, and the area directly above the tunnel roof within a defined perimeter can be sealed to prevent surface water from seeping downward.
Overall, tunnel waterproofing projects can be approached from the following aspects.
[Self-Waterproofing Concrete Structures]
The key to self-waterproofing concrete structures lies in ensuring dense concrete placement during construction and effectively preventing cracks from forming. While ordinary waterproof concrete is prone to shrinkage cracking, compensating shrinkage concrete addresses this issue remarkably well—it’s produced by either incorporating expansion agents into the cement or using expansive cement for mixing. Commonly used admixtures include crack-resistant FS-type water repellents and U-shaped expansion agents. Practical experience has shown that adding these admixtures can achieve highly effective results in both crack resistance and impermeability.
[Additional Waterproof Layer]
Tunnel projects often incorporate waterproof cement-sand mortar layers, sheet waterproofing systems, or coating-based waterproofing layers on the water-facing side, primarily to reinforce the structure's natural waterproofing capabilities and serve as a critical barrier against water ingress.
Yunnan Lincang Tunnel Waterproof Board Commonly used in tunnel waterproofing projects. The product is manufactured using an automated rolling production line, resulting in a single-step molding process. It is primarily made from high-quality ethylene-vinyl acetate copolymer, with added fibers to enhance strength; modifiers are incorporated to improve the material's physical and chemical properties; stabilizers ensure greater chemical and physical stability; anti-aging agents extend the product's service life; antioxidants boost its resistance to oxidation; and antimicrobial additives prevent bacterial and fungal attacks.
Yunnan Lincang Tunnel Waterproof Board The main engineering advantages are evident in the following areas:
1. Yunnan Lincang Tunnel Waterproof Board High impermeability coefficient—The waterproofing membrane delivers an unmatched anti-seepage performance compared to conventional waterproof materials. HDPE waterproof membranes boast exceptional tensile strength and mechanical durability. Their outstanding elasticity and deformability make them ideal for use on substrates prone to expansion or contraction, effectively addressing uneven settlement of the base surface. Additionally, their water vapor permeability coefficient is as low as K ≤ 1.0 × 10⁻¹³ g·cm/cm²·s·Pa.
2. Yunnan Lincang Tunnel Waterproof Board Chemical stability – The waterproof membrane exhibits outstanding chemical resistance and is widely used in wastewater treatment systems, chemical reaction tanks, and landfills. It withstands extreme temperatures and is resistant to asphalt, oils, and tar, as well as corrosion from over 80 types of aggressive chemical media, including strong acids, strong bases, and salts.
3, Yunnan Lincang Tunnel Waterproof Board Ageing resistance—The waterproof membrane boasts excellent anti-ageing, UV-resistant, and anti-fungal properties, allowing for outdoor exposure. With a material lifespan of 50 to 70 years, it provides a reliable solution for environmental seepage control.
4. Yunnan Lincang Tunnel Waterproof Board Anti-plant root—HDPE waterproofing sheets boast excellent puncture resistance, effectively guarding against most plant roots.
5, Yunnan Lincang Tunnel Waterproof Board High mechanical strength—The waterproof membrane exhibits excellent mechanical properties, with a tensile strength at break of 28 MPa and an elongation at break of 700%.
6, Yunnan Lincang Tunnel Waterproof Board Low cost, high efficiency—HDPE waterproof sheets utilize innovative technology to enhance their anti-seepage performance. Yet, the production process is now more streamlined and efficient, resulting in lower product costs compared to traditional waterproof materials. In fact, practical calculations show that using HDPE waterproof sheets can lead to cost savings of approximately 50 percent in typical construction projects.
7, Yunnan Lincang Tunnel Waterproof Board Fast construction speed—waterproof membranes offer exceptional flexibility, available in a wide range of specifications and installation methods to meet diverse engineering needs for seepage control. They are joined using hot-melt welding, ensuring strong, durable seams while enabling convenient, quick, and safe installation.
8, Yunnan Lincang Tunnel Waterproof Board Eco-friendly & Non-Toxic—The materials used in the waterproof membrane are all non-toxic and environmentally friendly. The impermeability is achieved through a purely physical process, ensuring no harmful substances are produced. This makes it the ideal choice for eco-conscious applications, including aquaculture and drinking water reservoirs.
ZHONGTAI HENGBANG Engineering Technology Co., Ltd. is a comprehensive service provider integrating engineering consulting and design, material R&D, production, manufacturing, as well as operation and maintenance services. With robust technical expertise and strong R&D capabilities, our products are prominently applied in critical areas such as hydraulic infrastructure projects, transportation infrastructure initiatives, and environmental protection fields like urban waste management and the safe isolation and impermeability of hazardous industrial solid wastes. The company boasts advanced production lines sourced from Germany, Italy, Denmark, Belgium, Switzerland, and other countries, adhering to stringent quality management systems and rigorous testing standards. We are equipped with state-of-the-art equipment capable of evaluating key performance metrics, including tensile strength, creep resistance, UV protection, water permeability, flame retardancy, anti-static properties, chemical corrosion resistance, and oxidation stability. Furthermore, our enterprise has successfully obtained certifications such as CRCC, ISO 9001, ISO 14001, OHSAS 18000, and MA certificates, along with inspection reports issued by China’s Ministry of Railways and Ministry of Water Resources, as well as the prestigious EU CE certification. Additionally, we have undergone specialized laboratory testing conducted by accredited facilities in Russia, Australia, the United States, and other regions. We are dedicated to delivering top-quality geosynthetic materials and unparalleled services for a wide range of projects, including reinforced earth retaining walls, soft ground stabilization, land reclamation and embankment construction/maintenance, hydraulic engineering, slope remediation and ecological restoration, road construction, and mining projects.
Consultation Phone: 13953856388
Contact: Mr. Zhang
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