Now in order to be able to park more conveniently, the underground garage will be built, and the exterior wall of the underground garage should also be waterproof, otherwise there will be a water leakage, which is indeed very inconvenient and affects people's lives. How to waterproof the exterior wall of the underground garage?
1. During construction, the outer wall of the basement must be made of structural self-waterproof concrete, and various steel bars or binding wires set inside the waterproof concrete structure shall not directly contact the formwork.
2. General basement waterproof engineering design, the exterior wall is mainly anti-water pressure or self-waterproofing, and then the membrane exterior waterproofing (i.e., water surface treatment), membrane waterproofing practice, in accordance with the relevant national regulations of the construction.
3. Underground engineering is more complex, and the design must understand the underground soil quality, water quality and groundwater level, and take effective fortification to ensure the waterproof quality during the design.
4. When the high water level of the basement is higher than the basement ground, the overall reinforced concrete structure should be considered in the basement design to ensure the waterproof effect.
Basement exterior wall waterproofing construction process?
1. Pouring concrete: The basement exterior wall formwork must be fastened with a one-time water-stopping screw. The outer wall of the basement shall be retained as required for construction joints and post-pouring belts. The construction joint or post-pouring belt shall be temporarily blocked with steel plate mesh, and the waterstop shall be set according to the regulations. The formwork sets aside a cleaning opening, and the garbage in the wall is cleaned up in time before the mold is closed. After the curing is completed, the disposable water-stopping screw is cut in time, and the end of the screw is closed with polymer cement mortar.
2. Tension screw treatment: according to the follow-up "one-time water-stopping screw node treatment".
3. Defect repair: Before the construction of the waterproof layer, the defects of the concrete exterior wall should be carefully repaired to ensure that the base layer meets the construction requirements of the waterproof layer. For general defects and concrete surface cracks, porosity and general defects with a crack width of less than 0 2mm, fill and level with concrete repair glue first, and then polish and smooth after drying. When the crack width exceeds 0 2mm, the pipe can be grooved and buried on the concrete surface, and the concrete crack can be repaired by pressure grouting method.
4. Waterproof additional layer: Before the waterproof additional construction, the outer wall base should be polished and smoothed, the defect repair should be completed, and the screw groove should be treated and smoothed. In the exterior wall construction joints, post-pouring belts, the bottom plate and the exterior wall junction, screws and other positions according to the requirements of the construction of waterproof additional layer.
5. Waterproof layer: After the acceptance of the waterproof additional layer, the construction shall not be less than 2mm thick polyurethane waterproof coating film, or not less than 4mm thick membrane waterproof layer.
6. Waterproof protective layer: construction of 30-thick polystyrene board waterproof protective layer. When the water level of the basement is high and the acceptance is allowed, a 120-thick non-clay brick wall can be used as a waterproof protective layer.
7. Outdoor backfill: Attention should be paid to protecting the waterproof protective layer when backfilling, and the waterproof protective layer should not be damaged. The backfill soil quality must meet the needs of the backfill, and the construction waste shall not be used as backfill.
Underground garage exterior wall waterproofing practice, only professional personnel can do, so the people need to ask a professional construction team to carry out, at the same time for the exterior wall waterproof material must choose the brand, so that these two days can be guaranteed, the waterproof effect will be better, for the basement exterior wall waterproof construction process, it is also necessary to know, so as to be able to do better construction, with a better waterproof effect.