Construction technology points and practices:
Measures and main points for roof roll bulging, cracking and mouth opening prevention:
Strictly control the moisture content of the base layer and the protective layer. After the base layer is dry, lay the heat preservation layer and waterproof layer. If the moisture content of the base layer and insulation layer is greater than the requirements of the specification, drainage grooves and exhaust holes must be provided.
Make an arc at the joint between the daughter wall and the roof. The radius R of the arc should not be less than 150㎜ to ensure that the base layer of the coil is firmly bonded and no additional layer is missed.
The construction shall be carried out according to the requirements of the specification, and the length of the coils shall be strictly controlled.
Leakage prevention measures and construction points of the surrounding wall of the pipeline out of the roof:
① The hole repairing work of the roof pipe should be completed before the roof waterproof layer, including the hole repair of the pipe. And a special person is responsible, and no plumber can make up holes to ensure repair quality.
The four-wall loose pumice stone is reserved for chiseling, and the rubbish is removed. The bottom mold must be firmly supported to ensure that the leakage slurry is not dropped.
② After wetting with water in advance, pour 20㎜1: 2 cement slurry to grout, and top up with C20 and micro-expansion agent fine stone concrete, and require compacting.
③ Use waterproof grease to caulk the surface the next day, and then use 1: 2 cement mortar to level the roof, and make a hoe around the pipe. It is better to fill in sealing material between the hoe and pipe Waterproof treatment.
Quality management system and measures to ensure waterproof construction
I. Establishing technical and quality post responsibility systems
1. Ensure that the quality of waterproof construction is qualified, excellent, clear division of labor, responsibility to others, and strictly control the quality.
2. The project engineer submits the waterproof construction plan to the technical management personnel.
3. Construction technicians provide technical explanations to the foreman and construction operators, and provide technical explanations and operation methods for difficult parts of the construction.
4. When waterproof construction, arrange the watch, technical responsibility, quality staff, foreman on duty, the key construction parts should be personally instructed to carry out side station inspection.
Sorting and management of engineering technical data
1. The project data must go on time and simultaneously with the project.
2. The certificate and retest report of the waterproof material product must be complete, qualified and complete.
3. For each process of construction, a concealed project acceptance visa and water storage test should be conducted. The waterproof project acceptance data must be processed and confirmed by the relevant supervision unit and signed.