Does the water stopping steel plate need to be retested, does the water stopping steel plate need to

The waterproof steel plate needs to be retested. Every effort should be made to ensure that the water-stopping steel plate is on the center line of the wall. The welding between the two steel plates should be full and double-sided welding, and the lap of the steel plate should not be less than 20mm. The treatment at the corner of the wall can be divided into whole steel plate bending, T-shaped welding, and figure-7 welding.

The support welding of the waterproof steel plate can be welded on the main reinforcement with small steel bars. The water-stopping steel plate passes through the column stirrups.

, the stirrups that are passed through can be broken and made into open hoops, which are welded to the steel plate. The "opening" of the water-stopping steel plate faces the water.

In the box foundation or basement, the concrete of the bottom plate and the exterior wall slab is poured separately, and the next time the wall slab concrete is poured again, there is a construction cold joint.

When this crack is located below the water table, it is prone to water seepage. In this way, it is necessary to carry out technical treatment on this seam, and there are many ways to deal with it, among which the more common method is to set up a waterproof steel plate.

Key points of waterproof steel plate construction.

1. Every effort should be made to ensure that the water-stopping steel plate is on the center line of the wall;

2. The welding between the two steel plates should be full and double-sided welding, and the lap of the steel plate should not be less than 20mm;

3. The treatment of the corner of the wall, 1. Bending the whole steel plate; 2. T-shaped welding; 3. 7-figure welding.

4. The support welding of the waterproof steel plate can be welded on the main reinforcement with small steel bars;

5. When the waterproof steel plate passes through the column stirrups, the stirrups can be broken and made into open hoops, which are welded on the steel plate.

6. The "opening" of the waterproof steel plate faces the water surface.

GB50208-2002 p19 pages.

Inspection methods: check the factory certificate or quality inspection report and on-site sampling test report.

Therefore, a re-examination is required.

The details are as follows: Sheet metal waterproofing layer.

This section is applicable to the waterproofing layer welded from metal sheets in underground works with high impermeability requirements.

The metal materials and protective materials used in the metal extremely waterproof layer should meet the design requirements. The specifications, appearance quality and main physical properties of metal materials and welding rods (agents) shall comply with the provisions of the current national standards.

The splicing of metal plates and the anchor connection between metal plates and building structures should be welded. The splicing welds of metal plates should be subject to visual inspection and non-destructive inspection.

When there is rust on the surface of the metal plate. In the case of defects such as pittings or scratches, its depth shall not be greater than the negative deviation value of the thickness of the plate.

The number of construction quality inspection of the metal plate waterproof layer shall be randomly inspected every 10m2 according to the laying area, and each place shall be lm2, and shall not be less than 3 places. Weld inspection should be according to different lengths of welds each spot check 5, but shall not be less than 1. For welds with a length of less than 500mm, 1 place for each weld; For welds with a length of 500 2000mm, check 2 places per strip; The length is greater than.

2000mm welds, 3 places for each weld.

Master project. The metal plates and welding rods (agents) used in the metal waterproof layer must meet the design requirements.

Inspection method: check the factory certificate or quality inspection report and on-site sampling test report.

Welders must pass the examination and obtain the corresponding qualification certificate.

Inspection method: check the welder's qualification certificate and assessment date.

General items. There must be no obvious concave surface and damage on the surface of the metal plate.

Test Method: Observation and Inspection.

The weld shall not have defects such as cracks, non-fusion, slag inclusions, welding nodules, undercuts, burn-throughs, arc pits, needle-like porosity, etc.

Inspection methods: observation inspection and non-destructive testing.

The welding wave of the weld should be uniform, and the welding slag and spatter should be cleaned; The protective coating shall not be leaking, peeling and rusting.

Test Method: Observation and Inspection.

No, just the material report and product certificate provided by the manufacturer!

Water-stop steel plate is a material widely used in construction projects to prevent water penetration. In order to ensure the quality of the steel plate in the construction process, it is necessary to carry out a retest inspection.

The following are the items that need to be carried out for the retest inspection of the waterproof steel plate:

Appearance inspection: check whether the surface of the waterproof steel plate is flat, and whether there are scratches, dents and other defects.

Thickness measurement: Measure the thickness of the waterproof steel plate to ensure that it meets the design requirements.

Conventional chemical composition analysis: chemical composition analysis is carried out on the waterproof steel plate to ensure that the composition meets the standard requirements.

Mechanical property testing: including tensile strength, yield strength, elongation and other mechanical performance indexes.

Tensile test: The sample is subjected to a tensile test to test its tensile strength and elongation.

Impact test: The sample is subjected to an impact test to test its impact toughness.

Metallographic structure inspection: Metallographic structure inspection of the sample to detect whether its tissue structure meets the requirements.

Filling and sealing performance testing: testing the sealing performance of the filling of the waterproof steel plate to ensure that water will not penetrate.

Through the re-test and inspection of the steel plate for socks and water calling, it can ensure that its quality and performance meet the standard requirements, so as to ensure the safety and reliability of the construction project.

Whether the waterproof steel plate needs to be sent for inspection should be operated according to the actual requirements of the construction.

Some need to be sent for inspection, some are exempt from inspection, but for special projects in large quantities of procurement is necessary to send for inspection, when receiving the goods for the waterproof steel plate inspection is there must be, for example, the actual measurement of the width and thickness of the waterproof steel plate, at least the material we can not see with the naked eye, so only by sending it to the phase shed to shout teasing the unit seepage detection will be obtained, so that our procurement channels should be through large manufacturers, so that we will understand the product more carefully, will teach us how to distinguish the national non-standard, In addition, the service of manufacturers with good comprehensive qualifications will also be in place. Therefore, we need to pay attention to some related matters when purchasing, so that we can avoid unnecessary risks in time.

Precautions for the purchase of waterproof steel plates.

At present, there are a lot of water-stopping steel plates on the market, and the product quality problems of some manufacturers are not excluded. Therefore, we must choose the products produced by regular brands when buying, and we can't just see the low price and not consider the quality of the chain sale, assuming that we buy inferior products, which will have an impact on the entire building construction.

Material: When purchasing, you must pay attention to the material of the steel plate, the poor quality of the steel plate has a lot of impurities, and the force is uneven, and there will be many potential safety hazards in the use of this steel plate. We can measure the thickness of both sides through vernier calipers, and if the thickness of the two sides is very different, we must not buy it.

Appearance: It is necessary to pay attention to observe that the surface of the waterproof steel plate is smooth, and there will be many small particles on the surface of some poor products. Before purchase or during the installation process, if you find that there are cracks on the steel plate, it means that the water-stop steel plate you purchased is a fake and shoddy product, and you should immediately find the manufacturer to return it. <>