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With the development of modern society, people's pursuit of the quality of food and clothing also hope to be more perfect, "house" is not only a place to rest, but also our warm harbor, imagine, their own housing often appear all kinds of water seepage phenomenon, is it very bad? So the waterproofing project in the building is indispensable, but also to do the drip does not leak.want to do a good job of waterproofing, we must first understand the building waterproof construction in the common water leakage points, as well as circumvention methods, in order to better do a good job of waterproofing. Next, follow the small editor to understand those waterproof construction easy to ignore the leak point!
the external wall around the leakage
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leakage cause analysis
(1) window frame around the wall is not dense, the outside of the seam is not sealed with sealing material, sealing material is not qualified;
(2) the window mouth did not do drip water tank (hawk mouth) or unreasonable construction;
(3) the outer window sill is higher than the inner window sill, forming a flood of water, rain water through the outer window sill into the indoor .
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precautions or solutions (1) Unframed window frames and walls are filled with foaming polyurethane and sealed with sealants.
(2) the framed window to be mounted when the frame should be installed firmly, the wall receiving mortar pressure, dense. When installing the window, leave enough gaps (greater than 5mm) between the frames to fill the foaming polyurethane and reseal the sealant.
(3) the upper port of the window to do drip sink (10mm wide, 10mm deep) or smear hawker, drip sink from the window side wall 20mm.
(4) before installing the window should first check the window sill height, whether due to the exterior wall decoration, the outer window sill is higher than the inner window sill, see that the problem should be unified after treatment, and then install, to ensure that the window sill inside the high and low.
(5) out window sill should have a 5% slope.
(6 aluminum or steel windows, the underside of the window should be framed well drainage holes to prevent cavities from allowing water into the room.)
cellular, hemp surface, exposed ribs, holes and other seepage
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leakage cause analysis
(1) with not allowed, collapse through small, long-distance transport and free mold height is too large, resulting in concrete dissosis;
(2) local reinforced steel dense or reserved holes of the lower concrete can not enter, vibration false or leakage, running mold leakage.
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precautions or solutions (1) concrete should be strictly measured, stirred evenly, long-distance transport after secondary stirring.
(2) for the free mold height is too high, should use a string barrel chute, pouring should be layered according to the construction plan, vibration and dense.
(3) for reinforced areas, can adjust the stone grade matching, larger reserved holes, should be reserved pouring port. The template should be firmly supported, in the concrete pouring process, should be assigned a special person on duty "to see the mold."
The construction seam seepage of the structure of the basement
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leak cause analysis
(1) construction seam left improper location;
(2) construction seam cleaning is not clean, new and old concrete can not be very good combination;
(3) steel is too dense, concrete is difficult to make.
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Preventive measures or solutions
(1) construction seams should be set up in accordance with the prescribed location, wall horizontal construction seams and water strip form to prevent water seepage, waterproof weak parts and the bottom plate should not be left facilities seams, wall panels such as the need to retain vertical construction seams, should be consistent with deformation seams.
(2) construction seam retention, clean-up and new and old concrete slurry should be unified deployment, by a person carefully and meticulously do a good job.
(3) designers should consider convenient construction to ensure the quality of the project when determining the position of rebar arrangement and the thickness of the wall. If the construction seam seepage can be found, waterproof leak-blocking technology can be used to repair.
the basement crucity structure cracks produce seepage
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the cause of leakage analysis
(1) dry shrinkage, temperature, cement use is too large or cement stability is not good and other factors caused by the cracks.
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preventive measures or solutions cement used in waterproof concrete must be tested to eliminate the use of stable non-conforming products, the matching ratio provided by the laboratory, and strictly control the amount of cement used.
for the basement floor plate and other large-volume concrete, should abide by the relevant provisions of large-volume construction, strictly control the temperature difference. Three-doped technology is used to prevent cracks in commercial concrete:
(1) is mixed with the power plant's II.grade ash, replacing part of the cement, in order to reduce cement heat, delay the speed of cement heat release, improve the strength of late concrete.
(2) the new technique of HEA compensation shrink concrete is adopted to increase concrete solidity and impermeability.
(3) doped with slow coagulation pumping agent, reduce water consumption, delay hydration time, improve concrete and susceptibility and pumpability.
design should take into account many adverse factors, so that the structure has enough safety, and reasonable set up deformation seams to adapt to structural deformation. According to past construction experience, the outer wall corner of the basement, due to the effect of temperature and contraction is particularly prone to stress concentration caused by wall cracking, in order to prevent such cracks from occurring, the best measure is to increase the appropriate amount of anti-cracking rebar at the design corner to withstand concentrated stress, to avoid cracks.
the basement pre-buried parts to produce seepage
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water leakage cause analysis
(1) pre-buried parts are too dense, buried pieces around the concrete vibration is not dense;
(2) collides the pre-buried parts before the concrete finally condenses, loosening the pre-buried parts,
(3) pre-buried pieces of iron feet are too long, penetrate the concrete layer, and do not weld the water-stopping ring according to regulations,
(4) pre-buried pipe itself has cracks and so on.
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preventive measures or solutions
pre-buried parts should have fixed measures, pre-buried parts should be dense places should have construction technical measures, pre-buried pieces of iron feet should be welded in accordance with the provisions of the water ring. The pipeline in the basement should be designed above the water table as far as possible, and all the pipes through the wall shall be provided with water-stopping casings, and the pipes and casings shall be flexibly connected.
the basement of the rear pouring belt treatment unreasonable leakage
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the cause of leakage analysis
(1) after the pouring belt of old and new concrete has not been combined well.
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Preventive measures or solutions
(1) first of all, the concrete at the back pouring belt to be chiseled
, chisel out of the new stone, there must be no loose stone; read these are not the building waterproof construction of the common water leakage point to understand a little more? Do waterproof construction must avoid these leak points, let our housing drip not leak, live comfortable, become our warm harbor!