High pressure water leakage plugging scheme for tunnels of Chengdu Hydropower Station Water seepage plugging on the downstream wall of the powerhouse of the hydropower station, and relevant personnel for plugging are on standby for 24 hours [Mr. Kuang: thirteen billion seven hundred and seventy million fifty-eight thousand five hundred and nineteen , thirteen billion nine hundred and twenty-one million eight hundred and eighty-six thousand one hundred and twenty-nine Leak stoppage company, low price] Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd
The plugging company has service outlets all over the country: if you call, the relevant personnel of the plugging company will immediately arrive at your side, and you are worth choosing professional parity. It can meet the needs of your company. You can arrive at the site on the day of receiving the call and provide satisfactory construction scheme and product quotation. We are willing to cooperate happily with your company, which is beneficial to win-win! 1、 Cause analysis 1. The original waterproof layer is damaged due to uneven foundation settlement Settlement joint Water leakage cannot meet the original waterproof design requirements. The above reasons must be analyzed and deeply understood, so that the correct construction can be carried out according to different situations to achieve the purpose of complete water stop. 2. Water leakage from cracks on concrete floor
The crack and water leakage of dock floor is a common problem in concrete structures. Its appearance will not only reduce the impermeability of buildings, but also affect the use function of buildings, further cause steel corrosion and reduce the durability of buildings. Therefore, the causes of concrete cracks are carefully analyzed, and effective measures are taken to prevent cracks in concrete structures. There are many reasons for cracks, mainly including the following: Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd 1. Design reasons, such as the shrinkage deformation of the concrete structure is not fully considered in the design, or the structural reinforcement is too few or too thick in the design, resulting in cracks in the components. 2. Material reasons, such as excessive mud content of coarse and fine aggregates, wrong concrete admixtures, wrong types of admixtures or improper admixtures, will aggravate the shrinkage of concrete. 3. Reasons for concrete mix ratio, such as excessive water cement ratio. Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd 4. The reason for construction and maintenance is that the vibration is not dense during construction, resulting in honeycomb phenomenon and local cracks; Improper heat dissipation measures for mass concrete cause excessive temperature difference inside the concrete, resulting in temperature difference cracks; For example, when pouring concrete, the wind speed is too high, and the concrete loses water too fast due to the sun exposure, resulting in excessive shrinkage of the concrete; Inadequate concrete curing measures will also cause early dehydration of concrete, resulting in shrinkage cracks; Therefore, it is particularly important to strengthen the quality management of the construction site. 5. Use reasons, such as excessive local load, rough decoration, random demolition of load-bearing walls or arbitrary opening, will cause cracking of concrete walls.$3NBNWMHU.tmp)
2、 Waterproof and leakage blocking scheme Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd According to the analysis of the above leakage causes, this waterproof plugging scheme uses grouting to stop water, and then polymer sealing material Flexible protection is followed by rigid protection. The specific plugging scheme is as follows: 1. Grouting plugging king 2. PE foam strip (double row) 3. Fast Plugging agent mortar (40~50mm thick) 4. PG321 two-component polysulfide (20mm thick) 5. Compressive sealant
6, expansion joint - side concrete Waterproof and leakage blocking scheme is as follows: (1) Base course cleaning: Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd Remove the original materials and impurities of the expansion joint to the specified height (generally 7~10cm deep), and flush with water. (2) Fixed grouting channel and grouting pipe: Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd Use quick plugging agent (liquid or powder) to mix ordinary Portland cement above 32.5 grade to fix the grouting channel PE foam strip. When fixing PE foam strip, one grouting pipe shall be buried every 50cm. The grouting pipe adopts a pressure resistant rubber hose with a diameter of Ø 10~13mm, which is used as both the water diversion pipe and the grouting pipe. (3) Grouting plugging: Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd Inject macromolecular grouting material - grouting leak stoppers from the bottom. The grouting pressure should be controlled between 0.3~0.5MPa. When the grouting hole is bleeding, stop grouting, close the valve, and then grout from another hole, and then proceed in sequence. After all grouting is completed, observe whether there is leakage. If there is still leakage in some places, supplement grouting from the nearest hole until there is no leakage. (4) Cutting grouting pipe: After 24h of grouting, all grouting pipes shall be cut off and the interface shall be dried with a blowtorch when no leakage is confirmed. (5) Clean the interface: Use a wire brush to clean up impurities and skin debris generated during baking with a blowtorch. (6) Construction flexible materials: Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd 50~60mm thick PG321 two-component polysulfide sealant shall be applied in the joint, and T-shaped 300 mm wide and 20 mm thick two-component polysulfide sealant shall be applied externally. (7) Make protective layer: After curing of polysulfide sealant, use compression sealant as the next semi-rigid protective layer. 3、 Crack leakage treatment scheme According to the requirements of Party A and the actual situation of the project, it is first necessary to carry out waterproof grouting for the leaking parts of the cracks, then carry out the two-component polysulfide sealant as the flexible waterproof sealing layer, and then carry out the construction of the rigid waterproof protective layer of the compressive sealant again. The waterproof and leakage blocking scheme of rigid protection and flexible waterproof is carried out according to the requirements of the National Technical Code for Waterproofing of Underground Works.
Waterproof and leakage blocking, structural reinforcement construction procedures are as follows: 1. First chisel a 70mm deep and 60mm wide "V" joint at the construction joint and flush it with water. 2. Fixed grouting channel and grouting pipe The PE foam strip of grouting channel shall be fixed with quick plugging agent and ordinary Portland cement above 32.5 grade. When fixing the PE foam strip, a grouting pipe shall be buried every 50cm or so. The grouting pipe shall be a pressure resistant rubber hose of Ø 10~13mm, which has been used as both water diversion pipe and grouting pipe. 3. Grouting leakage stopping and water stop and polysulfide flexible sealing waterproof construction Inject macromolecular grouting material - grouting plugging king from one side, and the grouting pressure is controlled between 0.3~0.5MPa. When the grout comes out from one hole next to the grouting, stop grouting, close the valve, and then grout from another hole to plug the leakage, and then proceed in sequence. After all grouting is completed, observe whether there is leakage. If there is still leakage in some places, supplement grouting from the nearest hole until there is no leakage. PG321 two-component polysulfide sealant shall be applied after pipe cutting.
Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd 4. Construction of rigid protective layer After waterproof and leak stopping grouting, the cracks will not leak again, but the strength of the structure has not been improved. It is necessary to use compressive sealants plus various additives, activators and additives to make a structural reinforcement material with high degree and low viscosity. When the material is solidified and reaches the deadline, it can produce a structural strength greater than C30, so that the upper and lower concrete slabs can be connected as a whole, To achieve the goal of long-term overall work. 4、 Leak stoppage process: 1. Before determining the repair plan and plugging, field investigation must be carried out to find out the concrete construction quality, analyze the causes of water leakage, find out the position where the crack occurs, the width, length, height and penetration of the crack, understand the water leakage in rainy and dry seasons, measure the flow and flow rate of the leakage, etc. Through full investigation, the repair plan should be correctly formulated and all preparations should be made. 2. Material performance characteristics DH-814 Ⅱ polyurethane quick plugging adhesive is reactive when it meets water. Because water participates in the reaction, the slurry will not be diluted and washed away by water, which is an advantage that other grouting materials do not have; Under the pressure, the grout is poured into the concrete cracks, and at the same time it penetrates around the cracks. When it meets water, it reacts again, foams and expands, forms a secondary penetration, and continues to penetrate into the concrete cracks, eventually forming a network structure, becoming an elastomer with low density and water content, having good adaptability to deformation and good water stop performance. 3. The design of grouting holes and the hole arrangement of hole arrangement grouting holes can be divided into two types, namely, cross joint and inclined hole, which can be selected according to the actual situation and needs, and both can be used when necessary. Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd (1) Design of grouting hole: position of grouting hole,
The hole shall intersect the water leakage crack and be selected at the place with large water leakage. (2) Principle of hole arrangement: the location and number of grouting holes shall be reasonably arranged according to different water leakage situations. For the purpose of deriving water leakage, holes shall be arranged at concentrated water leakage places. Large cracks and large water flow will lead to large hole spacing, while small cracks will lead to small hole spacing. 4. According to the construction conditions, manual and mechanical methods are adopted for drilling. Generally, manual drilling and mechanical drilling are used together. 5. Check the operation of grouting equipment and pipelines, check the strength of the consolidation nozzle, dredge the cracks, and further select grouting parameters (such as gel time, grouting pressure and grout dosage). 6. Grouting is the central link of the whole chemical grouting, which must be carried out after all preparations are completed. Before grouting, the division of labor must be carried out in a preparatory manner, and the posts must be fixed, especially the operation of full-time skilled personnel. Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd (1) Before grouting, the whole system shall be checked as a whole. Grouting can be carried out only when the grouting machines and tools operate normally and the pipelines are unblocked. (2) Vertical joints are generally grouted from bottom to top, and horizontal cracks are grouted from one end to the other or from both ends to the middle; For concentrated water leakage, the holes with large water leakage shall be grouted first. 7. Finish grouting. When the pressure is relatively stable, continue grouting for another 1-2 minutes to finish grouting. Dismantle the pipeline for cleaning. 8. When the sealing hole is checked to be free of water seepage, remove the grouting head and fill the hole with cement mortar and other materials. 5、 Precautions: 1、 The characteristic of water is that water penetrates everywhere. It gradually penetrates into the interior of the building through wind pressure, convection, impact, adhesion, capillarity and other forces, and it is not easy to detect from the surface in the process of penetration. In other words, to find the cause of water leakage, we must go deep into the "viscera" analysis and judgment, so as to suit the remedy to the case. 2、 Pressure change of water and steam Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd Once the water penetrates into the building, in a limited space, when the sun shines and generates heat energy, it will form water vapor, which will generate a lot of pressure enough to damage the original waterproof layer, and even the surface decoration and decorative materials (such as paint falling off, wallpaper blackening, tile bulging, and wooden floor bulging). In other words, if a unit of water turns into water vapor, In the limited space inside the building, 1240 times of pressure is generated. The destructive nature of the pressure is terrible. (Therefore, we often find that the waterproof glue is applied on the foam cement with water, and soon the whole bulge is peeled off.) 3、 The interface between the base layer and the waterproof material must be free of swelling, sand, honeycomb, wood, paper scraps, sludge, small stones, or loose and unstable surface, because of poor adhesion, coupled with the destruction of solar ultraviolet rays, the building itself is hot and cool, and the destruction of steam pressure, which is easy to cause aging and failure of the waterproof layer.
4、 The front waterproof is excellent. For example, the roof waterproof is directly applied to the roof surface, the wall waterproof is directly applied to the external wall, and the water tank leakage is directly applied to the inner layer of the water tank. The water will spread to other places under pressure, and it is not easy to construct in the dead corner of the house. The word "better than" here is relatively comparative, not better. With the development of science and technology, waterproof materials for back surface construction and expansion crystals produced by injecting synthetic resin at high and low pressure have been introduced in the market, which can also be waterproof, but not all occasions can be successfully constructed, so it is necessary to adopt front waterproof construction. Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd 5、 Containment type waterproofing is easy to fail. Waterproofing should start from the root cause. With containment method, water is everywhere and will also cause pressure damage. If the root cause is not cured, it can't be good. For example, the location of the roof leakage is just inside the illegally built room, and ordinary people want to intercept water from the outside, which is easy to fail. 6、 The definition of leak stop is No matter the water pressure, rain or roof, the paint in the room will not change color or bubble. 7、 The concept of "free waterproof" Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd To achieve the waterproof effect, it does not need to spend money. In addition to "deterioration", concrete itself has waterproof function. For example, for the houses built in the past, the exterior walls were not pasted with tiles, and the clay stones would not leak, but now the houses in the villa area still leak after the expensive * * * waterproof coating is made! 8、 No material is better. Any waterproof material has its uniqueness and applicability. The concept of "one dose cures all diseases" is wrong. So how to choose materials is an important topic. Good doctors are mainly "taking medicine" instead of being led by "medicaments". Choosing Yancheng to stop leakage will stop you from worrying about water leakage! Yancheng Zhiruixiang Waterproof and Leak Stopping Engineering Co., Ltd
