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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 can quality control be achieved for several key processes in the construction of Chongqing's EVA waterproof tunnel panels?
Release date:
2020-10-07
Tunnel construction takes place underground, where working spaces are confined and the scope of operations is extensive. It is an exceptionally complex, integrated process characterized by a wide variety of construction trades, overlapping tasks, tight coordination among construction phases, large-scale structures with high structural integrity, and a lengthy project timeline—all of which are significantly influenced by natural environmental conditions. As a result, ensuring quality control in tunnel projects is an incredibly challenging task.
1. Chongqing EVA Waterproof Membrane Suspension Quality Control
Nowadays, tunnel designs typically employ the New Austrian Tunneling Method (NATM) combined with shotcrete and rockbolt support. After excavation, an initial lining—consisting of sprayed concrete—is applied immediately as the primary support, followed by the installation of additional elements. Chongqing EVA Waterproof Membrane , then apply the secondary lining. As for Chongqing EVA Waterproof Membrane The installation typically involves using a nail gun to drive cement nails into the surface and suspend the waterproof membrane. However, during implementation, issues arise because the initial shotcrete support layer is often thin and unevenly applied. In areas where the shotcrete is particularly thin, it becomes difficult to hammer in the cement nails—instead, they tend to bounce back, posing a risk of injury. Moreover, the nail heads are easily knocked off, leaving sharp, exposed portions of the nails that can easily puncture the waterproof membrane, ultimately leading to its failure. To address these challenges during construction, contractors may be instructed to use an electric drill to create pilot holes (8–10 mm in diameter) and then insert wooden wedges as a safer alternative to securing the waterproof membrane. Chongqing EVA Waterproof Membrane The method, proven in practice, is not only cost-effective and safe to implement but also ensures reliable suspension of the waterproof panels. Additionally, the exposed length of the wooden wedges is easy to control, eliminating concerns about puncturing the waterproof membrane and causing leaks.
2. Quality Control for Waterstop Installation
Installing waterstop strips can be relatively challenging. When embedding the waterstop at horizontal construction joints, it’s recommended to add a custom-made rebar clip made from 6.5mm steel bars every 50 to 100 centimeters. These clips help secure the waterstop, preventing it from being crushed or displaced downward by the weight of concrete poured into the sidewalls during construction. If the waterstop is installed around the perimeter, since nail-driven fasteners are not permitted according to inspection standards, L-shaped rebar clips crafted from 6.5mm steel bars are used instead. These clips firmly anchor both the waterstop and the rebar directly onto the end formwork. Finally, when removing the end formwork, the waterstop can be carefully pried out, ensuring precise positioning and high-quality installation of the waterstop system.
3. Quality Control for Waterstop Installation
Installing waterstop strips is relatively challenging. When embedding the waterstop at horizontal construction joints, it’s recommended to add a custom-made rebar clip made from 6.5mm steel bars every 50 to 100 centimeters. These clips help secure the waterstop, preventing it from being crushed or displaced by the downward pressure of concrete poured during wall construction—thus avoiding water leakage through the horizontal joint. Similarly, when installing circumferential waterstops, since nail-driven fastening is prohibited by inspection standards, L-shaped rebar clips crafted from 6.5mm steel bars are used instead. These clips firmly anchor both the waterstop and the rebar directly onto the end formwork. During formwork removal, the waterstop can then be carefully pried out, ensuring precise positioning and high-quality installation of the waterstop system.
4. Waterproofing Quality Control for Arch Construction Joints
When designing tunnel construction's inverted arch construction joints, waterproofing measures are typically not considered. If these joints are handled carelessly during construction, it can lead to water leakage, causing significant trouble during operation and maintenance. This is especially critical for highway tunnels, where pavement requirements are even higher—any water seepage into the road surface could potentially result in serious traffic accidents. To address this issue, we’ve implemented special requirements for construction joints during the building process. In addition to following the standard procedures for joint treatment, we specifically mandate that the inverted arch construction joints (both transverse and longitudinal) be staggered by more than 50 centimeters from the base slab construction joints. Supervising engineers rigorously enforce this guideline. As a result of this straightforward yet effective measure, we’ve achieved excellent outcomes.
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 impermeability solutions for urban waste and hazardous industrial solid waste management. 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 critical properties—including tensile strength, creep resistance, UV resistance, water permeability, flame retardancy, antistatic performance, chemical corrosion resistance, and oxidation stability—ensuring top-tier product quality. Furthermore, our enterprise has successfully obtained certifications such as CRCC, ISO 9001, ISO 14001, OHSAS 18000, and MA certificates, along with inspection reports from the Ministry of Railways and the Ministry of Water Resources, the EU CE certification, and approvals from specialized laboratories in Russia, Australia, the United States, and other regions. We are dedicated to delivering the finest geosynthetic materials and the most comprehensive services for projects spanning areas like reinforced soil retaining walls, soft ground stabilization, land reclamation and dike maintenance, hydraulic engineering, slope remediation and landscaping, road construction, and mining projects.
Consultation Phone: 13953856388
Contact: Mr. Zhang
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ZHONGTAI HENGBANG Technology Co., Ltd.
Address: East Section of Zhongtianmen Avenue, Tai'an High-tech Zone, Shandong Province
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