Waterproof plugging construction method and waterproof plugging implementation project

1, plugging construction method

Plugging: Use a chisel or a percussion drill to make the water penetrating site 4 to 5 cm deep and a hole of 2 to 3 cm in diameter. After flushing, add water (gray:water=1:0.3) to the r-1 material and mix well. Into the material group (size similar to the hole), the palm of the hand feels warm, quickly stuff the material in the hole, and press the palm of your hand for a few minutes, after the palm feels stiff, release the palm and flatten it with a wooden board. 15 minutes after wet curing;

Plastering: After the base surface has been cleaned and fully wetted, add water (ash:water=1:0.4) to the r-1 material (stirred or pellets) and put it into a putty form. Use a trowel or a scraper to quickly apply Layer material (thickness 1mm), the coating is cured after curing, sprayed with water, and then on the second layer of material (thickness 1mm), when the material is put into use, the force is applied to make the coating dense. If there is still some water seepage or wet stains, just add a layer of water in the water or wet spot until it is not wet. And pay attention to lap, not too much each ingredient (each stirring should be used before the condensation) in order to avoid waste. After curing, the coating should be wet cured for 3 days.

d, Note: Mixing materials used with the distribution, mixing good material must be used before the condensation; try to avoid construction under the hot sun, if the construction coating under the hot sun, the sun should be promptly added measures and wet conservation, Antifreeze should be added to the construction below 0°C. When the material is stored, it should be placed in a dry place indoors. After the material is removed from the bag, the excess material should be tightly closed and not exposed to moisture.

(3) Ultra-early strong self-leveling cement-based grouting material Ultra-early strong self-leveling cement-based grouting material new product, is a cement-based, setting time adjustable water-hardening grouting material, which is characterized by super early strength, high strength, Micro-expansion and self-compacting, self-leveling, good irrigability, and simple construction.

The product is a powder material, easy to use, according to the cement ratio of 0.35 ~ 0.45 directly add water, stir evenly after use. After infusion, no need to shake

This product is particularly suitable for emergency repair projects, such as the railway bed base disease rectification project (without affecting the train operation), the 3800-meter-high Qinghai Dagu Mountain Highway tunnel grouting (cold area), Yunnan Baihushan Tunnel, Shanghai The grouting and plugging of over 10 tunnels including the tunnel outside the tunnel was successfully applied. In the rapid repair of No. 4 blast furnace in Wuhan Iron and Steel Works, ultra-early self-leveling self-leveling concrete was prepared using the ultra-early-strength grouting material developed. , 6h concrete strength reached more than c30, the application effect is very good, saving maintenance time, reducing the huge losses brought about by the suspension of maintenance.

3 construction methods

a. Drilling: The principle of fabric hole is to close the dense and middle hole first, and punch the hole with a pressure fan to completely clear the hole and sludge. Through the punch hole, the connection relationship between hole positions can be understood. Determine the sizing hole and the vent hole;

b. Grouting: Prior to grouting, a water injection test shall be conducted to check whether the holes are unblocked, and then ultra-early-strength self-leveling cement-based grouting materials shall be slurried with a mixing mechanism according to the ratio of gray water to grout 1:0.4. After putting it into the drum,

The squeezing is performed by the pressure pump feeding the slurry from the pipeline to the working surface, and the grouting process may depend on the setting time of the slurry to ensure its strength.

4 matters needing attention

a. The product should be used under the stable environment of 16°C~28°C. The condensation time of the products used at other temperatures will vary greatly. Therefore, when the user uses them, it should be explained that we will provide products at low temperature or high temperature. ;

b, the product should be stored in a dry environment, shelf life of 6 months, should be used after passing the test.

(4) Modified epoxy resin grouting material

The modified epoxy resin grouting material is characterized by high strength and strong adhesive force of epoxy resin. It is modified to have good durable adhesive force at the wet contact surface, disperse with water, and good irrigation property. It is a high-quality grouting material that improves the compactness of concrete, repairs seams, and reinforces water.

1 modified epoxy resin grouting materials should meet the following conditions to use

a, can be filled, after solidification does not shrink, no dissolved substances, can be filled k = 10-6 ~ 10-8cm / s, stratum can be poured into the 0.01mm crack;

b. With strong adhesion, it can bond seams, wet seams, underwater seams, and can bond cracks that are contaminated with oil, organic matter, dust, etc.;

c. Comprehensive mechanical and physical properties, strength, bond strength, tensile strength, shear stress and other indicators, can be applied to the construction under dynamic load (such as high pressure water head water shutoff reinforcement, reinforcement of subway and highway track bed, reinforcement of house foundation , Reinforcement of bridges, reinforcement of concrete structures and plugging of water, etc.);

d, the material does not contain dissolved substances, no shrinkage, no pollution to the environment, corrosion-resistant non-corrosive consolidation body non-toxic, good durability (adhesion),

f. After the sealing material is consolidated, take the chemical slurry from the grout nozzle from the left side of the crack to the right (or right to left) or from the bottom to the top. The grouting pressure must be slowly increased when the grouting is performed. After the pressure rises to 1~8mpa, under the premise of no pressure, if the gauge of the grouting pump indicates that the needle does not substantially fall within 2~3min, the nozzle grouting can be stopped and moved to the next nozzle for continuous irrigation. In the process of filling, if there is flooding of the grouting nozzle, the flooding nozzle will be closed (the high pressure rubber pipe is fastened with iron wire). If leakage occurs at the sealing seam, grouting should be stopped, and the area should be blocked with the sealing material. Bit;

e. Surface cleaning and equipment maintenance

After the slurry solidifies, the surface should be cleaned in time.

The continuous use of the grouting machine shall not exceed 10 h in total. If the priming machine stops working more than 30 min halfway, the machine shall be cleaned in time, and the special cleaning agent or acetone may be used for cleaning.

Always check the machine before use, if found abnormal, immediately repair it to prevent accidents.

3 crack repair testing

Drilling machine for coring inspection. The test result should be that the surface of the concrete is smooth and compact, the slurry is filled with cracks, and the core sample is subjected to a concrete strength test to reach the original design value.

Smear repair

The process of repairing cracks and smearing ruggedness is as follows:

1) Thoroughly clean and wet the surface to be repaired and remove any loose material and excess water.

2) Apply a paste to the base material in the repair area.

3) Mix the smear layer and mix until the desired consistency is obtained. If the mixture is too dry, add the wet premix; if the mixture is too dilute, add the dry material of the specified ratio and mix well.

4) Use a squeegee, a ruler to apply cracks and uneven surface smear repair mix proportions. The repair mix must be able to flow into cracks or weathered areas to find and fill all pores.

5) Use a paste to coat the patch and finally apply the patch to make the surface level and smooth.

6) Carefully protect already repaired areas, avoid walking, water flow, etc. until dry.

3. Limitation of use and coating maintenance of permanent condensate RMO concentrate

1) Construction is required when it is rainy or snowy or below 10°C. Measures must be taken. When RMO concentrate precipitates, it cannot be used.

2) The RMO coating needs sufficient curing time. After 12-24 hours, normal traffic does not hurt. The use of the interior is not straight to the sun. The allowable time is 72 hours.

The surrounding conditions concern the need for coating time between the coating and the last coat. Apply the coating outdoors, fully exposed to sunlight, quickly dry in warm, dry weather, after 20-30min, when you reach the dry surface, you can apply additional layers, coating layer. If indoors, day and night maintenance may be required in cold and humid climates. For the follow-up process to achieve practical work.