1. Leakage treatment in underground engineering shall follow the principles of combining plugging with drainage, adapting to local conditions, combining rigid with flexible measures, and comprehensive treatment.
2. Before leakage treatment, the design, construction, and acceptance documentation of the original waterproofing and drainage systems shall be understood.
3. Leakage treatment construction shall proceed in the order of roof (arch) first, then walls, and finally the bottom slab, and the existing intact waterproofing layer shall be damaged as little as possible.
4. For underground engineering with dewatering and drainage conditions, dewatering and drainage work shall be carried out before treatment.
5. Non-toxic, low-pollution materials shall be selected during the treatment process.
6. Safety measures and labor protection during the treatment process must comply with relevant safety construction technical regulations.
7. Leakage treatment in underground engineering must be completed by professional waterproofing designers and professional construction teams with waterproofing qualifications.