Maintenance of leakage problems in the South-to-North Water Diversion Project of China

Several gate chambers, storage areas, and cable trenches of the South-to-North Water Diversion Project have experienced water leakage problems. As this project is a key drinking water project, the materials used must meet environmental protection requirements. Therefore, environmentally friendly materials need to be adopted to solve the water leakage issue. In the gate chamber storage area, the water leakage mainly manifests as fine cracks appearing on the surface of the concrete structure. Rainwater and groundwater seep through these cracks, causing local water accumulation in the storage area. If not dealt with in time, it may affect the stability of the surrounding foundation. In the cable trench, due to long-term exposure to a humid environment, some sealing joints are not tight, resulting in water dripping. This not only poses a potential threat to the cable equipment but also may breed microorganisms, affecting the overall hygiene standards of the project. In response to this situation, the client, after conducting investigations with multiple companies, adopted Zhengzhou Seno Technology for targeted treatment. Eventually, the water leakage problem was resolved and the environmental protection requirements were met.