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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.
How is waterproofing done during tunnel construction and drainage work?
Release date:
2020-09-28
Leakage in tunnels and underground projects has long been a major headache for construction workers—so much so that there’s even a saying: "Nine out of ten tunnels leak." Proper tunnel waterproofing and drainage are crucial to ensuring high-quality tunnel construction. Be sure to take a good look at the following knowledge-packed tips!
Leakage in tunnels and underground projects has long been a major headache for construction workers—so much so that there’s even a saying: "Nine out of ten tunnels leak." Proper tunnel waterproofing and drainage are crucial to ensuring high-quality tunnel construction. Be sure to take a good look at the following knowledge points!
1. The principle of "combining prevention, drainage, interception, and sealing, tailored to local conditions, and implementing comprehensive management" should be followed.
Protection: Waterproof concrete, waterproofing layers (internal application, external application)
Drainage: Subsurface pipes, French drains;
Cut: Surface water interception channels, crack blockages;
Blocking: Grouting
II. Waterproof design should be approached from three key aspects:
1. Surrounding rock reinforcement: In water-rich sections, curtain grouting will be employed.
2. Install the waterproof layer using a nail-free method with polymer membranes;
3. Durable waterproof concrete, especially for treating construction joints and expansion joints.
3. Lining Concrete Waterproofing
Tunnel self-waterproofing: waterproof concrete, and proper treatment of all construction joints.
Concrete lining serves as the final line of defense for tunnel waterproofing, and the general requirements are as follows:
1. In general areas, the impermeability grade must be at least P6; however, when the average temperature drops below -15°C, the impermeability grade must be increased to at least P8.
2. The impermeability grade of the test specimen should be higher than the design requirement.
3. Waterproof concrete structures must meet the following requirements: lining thickness shall be at least 300 mm; crack widths must not exceed 0.2 mm and must remain non-through; the protective layer thickness for main reinforcement on the water-facing side should be no less than 50 mm.
IV. Ordinary Waterproof Concrete: This refers to a type of concrete whose density and impermeability are enhanced by controlling the water-to-cement ratio, while appropriately adjusting the sand content and cement dosage. Its mix design must be determined after conducting tests to evaluate both compressive strength and waterproofing performance.
5. Installation of Externally Applied Waterstop Strips
Location: On the outer side of lining structure construction joints and deformation joints; during construction, first mark the installation lines at the positions where waterstops are to be installed, as per design specifications.
Base surface treatment: The width of the waterproof mortar coating should exceed the outer waterstop width by at least 20 cm.
Waterstop fixing: Use double-seam heat welding for materials of the same type; for different materials, apply bonding methods instead.
Only with high-quality materials combined with standardized construction can you achieve twice the result with half the effort—and ensure excellent waterproofing!
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ZHONGTAI HENGBANG Engineering Technology Co., Ltd. is a comprehensive service provider integrating engineering consulting and design, material R&D and manufacturing, as well as operations and maintenance. With robust technical expertise and strong R&D capabilities, our products are prominently applied in environmental protection fields such as hydraulic infrastructure projects, transportation infrastructure initiatives, and the isolation and anti-seepage solutions for urban waste and hazardous industrial solid waste. 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 testing equipment capable of evaluating critical properties—including tensile strength, creep resistance, UV resistance, permeability, flame retardancy, antistatic performance, chemical corrosion resistance, and oxidation stability—ensuring superior product quality. Furthermore, ZHONGTAI HENGBANG has successfully obtained certifications such as CRCC, ISO 9001, ISO 14001, OHSAS 18000, and MA certificates, along with inspection reports from China’s Ministry of Railways and Ministry of Water Resources, the EU CE certification, and approvals from specialized laboratories in Russia, Australia, the U.S., and other regions. We are dedicated to delivering top-quality geosynthetic materials and unparalleled services for projects spanning areas like reinforced soil retaining walls, soft ground stabilization, land reclamation and embankment construction/maintenance, hydraulic engineering, slope remediation and greening, road construction, and mining projects.
Consultation Phone: 13953856388
Contact: Mr. Zhang
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