Nowadays, more and more large houses such as villas, wide houses, etc. have basements, and many households no longer “undermine†the basement. Many people begin to design basements. In the basement below the surface, water seepage often occurs, causing the basement to be damp and mildewed, and the items stored inside are often deteriorated due to humidity and become ineffective. The basement waterproofing process is more complicated and the process requirements are relatively high, so it is difficult to obtain the desired results. Here, I would like to introduce to you the engineering knowledge of what the underground outdoor wall waterproofing is. Let everyone know the specific waterproofing process of the underground outdoor wall. When seepage in the basement, repair it according to related regulations.
Underground outdoor wall waterproof basic requirements:
1. During construction, underground outdoor walls must be constructed of self-contained waterproof concrete, and various reinforcing steel bars or wire bundles placed inside the waterproof concrete structure must not be in direct contact with the formwork.
Second, the general basement waterproof engineering design, the main external wall of the water pressure or self-water-proof, and then do the coil outside the waterproof (that is, meet the surface treatment), coil waterproof practices, in accordance with relevant state regulations.
Third, the underground engineering is more complex, the design must understand the underground soil quality, water quality and groundwater level conditions, and take effective protection when designing to ensure the waterproof quality.
4. When the maximum water level of the basement is higher than that of the basement floor, the design of the basement shall consider the overall reinforced concrete structure to ensure the waterproof effect.
Construction process: concrete pouring - screw handling - defect repair - waterproof additional layer - waterproof layer - waterproof protective layer - outdoor backfill soil.
Construction main technical links:
1. Pouring concrete: The basement exterior wall template must be sealed with a single-use waterstop screw. The underground outdoor wall is left as required for construction joints and post-casting belts. Construction joints or post-casting belts shall be temporarily plugged with steel nets and water-stopping belts shall be provided as required. The template is left with a sweeping port, and the garbage in the wall is cleared before the mold is closed. After curing is completed, the disposable water-stopping screw is cut off in time, and the screw head is closed with a polymer cement mortar.
2. For the screw processing: follow the follow-up "one-time sealing screw node processing" implementation.
3. Defect repair: The waterproof layer shall be carefully repaired before the construction of the concrete outer wall to ensure that the primary layer meets the waterproof layer construction requirements. For cracks, pores, and general defects on concrete surfaces with general defects and crack widths of less than 0.2 mm, fill and flatten it with concrete repair glue and smooth it after drying.
When the crack width exceeds 0.2mm, a pipe can be buried on the surface of the concrete and the concrete cracks can be repaired by pressure grouting.
4. Waterproof additional layer: Before waterproof additional construction, it shall be smooth and smooth to the outer wall base layer, repair the defect, and the screw groove has been processed and leveled. Construction of waterproof extra layers shall be required at the construction joints of outer walls, post-casting belts, floor and exterior wall transitions, and screws.
5. Waterproof layer: After the waterproof additional layer is qualified, the construction shall be no less than 2mm thick polyurethane waterproof coating, or no less than 4mm thick waterproof layer.
6, waterproof protective layer: construction of 30 thick polystyrene board waterproof protective layer. When the water level in the basement is high and acceptance is acceptable, a non-clay brick wall with a thickness of 120 can be used as a waterproof protective layer.
7. Outdoor backfill: When filling the soil, protect the waterproof protective layer and do not damage the waterproof protective layer. The backfill soil and soil must meet the need for backfilling. Construction waste should not be used as backfill.
Basement waterproof construction process
The basement floor of this project and the underground outdoor wall waterproof layer are two. The use of 2mm thick polyurethane waterproof coating, the membrane using EPDM rubber waterproof membrane 1.5mm thick.
1. The waterproof layer of the underground waterproofing project shall be constructed after the acceptance of the foundation and structure.
2. During the construction of basement waterproofing works, the groundwater level shall fall below the lowest elevation of the waterproofing project and shall not be less than 300mm until the waterproofing project is completed.
3. Polyurethane waterproof coating construction, process and method
Waterproof coating construction process
Construction sequence: Primary treatment Coating Primer coating First coating film Waterproof layer Coating surface Coating Waterproof layer Quality inspection Acceptance of inspection The next step of coil construction.
Before construction, it should be inspected. The grass-roots level should be solid and have a certain strength, and there should be no floating soil sand particles and other pollutants on the surface. The base should be dry and the moisture content should be less than 9%.
The coating sequence should be vertical, followed by the horizontal plane, the first yin and yang angles and the detail after the coating surface should be straight.
Basement waterproof practices
1. The waterproof project of outdoor enclosure structure is divided into concrete structure engineering and anti-permeability structural waterproofing. The base floor impermeability rating of the basement is 0.6Mpa. The mix ratio of the concrete shall be determined by the laboratory and the impermeability rating shall be one level (0.2Mpa) higher than the design rating.
2, the base floor waterproof layer is two, the use of membrane - paint combination waterproof control. The coil is made of 1.5mm thick EPDM rubber waterproof membrane and the waterproof coating is made of 2mm thick polyurethane waterproof coating.
3, underground outdoor enclosure structure In addition to the underground outdoor wall anti-permeability structure waterproof, the same two waterproof layer, using coil - coating combination of waterproofing program, coil 1.5mm thick EPDM rubber waterproofing membrane, Waterproof coating uses 2mm thick polyurethane waterproof coating. The protective layer of the waterproof layer is made of 40 thick polystyrene board. The outer layer of the side wall protection layer is excavated within one meter and layered and backfilled with 2:8 lime soil. Compaction coefficient >0.95.
4, the roof of the basement is not in the upper part of the main body of the building, the roof should be made of waterproof, the waterproof layer also uses the coil - coating combination of waterproofing program, waterproof layer protective layer is 50mm thick C20 fine stone rake.
Editor's summary: The relevant information about underground outdoor wall waterproofing practices and basement waterproofing construction technology was introduced here for everyone. I hope this article will be helpful to everyone. If you still have something you don't understand, you can leave a message to Xiaobian at the bottom. We will answer your questions as soon as possible.
Decoration waterproof
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