Reservoir expansion joint How to deal with the leakage and how to stop the leakage maintenance scheme How to stop the leakage of the expansion joint of the pool in the waterworks of Jiangsu Lanlong Building Waterproof and Leak Stopping Engineering Co., Ltd? Contact the * * expansion joint plugging company. Use high-pressure grouting for water plugging and oily foaming polyurethane 。 The oil-based polyurethane quick plugging adhesive reacts with water. Because water participates in the reaction, the slurry will not be diluted and washed away by water. Under the pressure, the grout is poured into the concrete gap or hole, and at the same time penetrates around the gap, and continues to penetrate into the concrete gap to form a network structure, forming an elastomer with low density and water content, which has good adaptability to deformation and good water stop performance. Determination of construction process flow of water plant pool expansion joint plugging grouting waterproof plugging scheme → cracks surface treatment → Embedding grouting holes → Sealing → Sealing inspection → Grout allocation → Grouting → Inspection and sealing must be completed before plugging. Field investigation must be carried out to find out the construction situation on the site, analyze the reasons for water seepage, and find out the length, width, high-level degree and penetration of the leaking part, crack, crack or perforation. The crack surface treatment removes the dust, scum and dirt from the loose layer on the crack surface, and then use a brush dipped with alcohol, acetone and other agricultural production system solvents to clean and keep dry at 30~50mm on both sides of the crack [Random picture 1] There are two types of holes for embedding grouting holes: cross joint and inclined hole, which shall be selected according to the actual situation and needs, Use both when necessary. 1) Design of grouting hole: the position of grouting hole shall be such that the gap between the hole and the leakage crack intersects and is calculated at the leakage amount. 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 water leakage everywhere, holes shall be arranged at concentrated water leakage places. Large cracks and large water flow lead to large hole spacing, while small cracks lead to small hole spacing. Perforating: manual and mechanical methods are adopted according to the construction conditions. Generally, manual and mechanical methods are used together. Embed grouting nozzle: Embed grouting holes at the intersection of cracks, the wider part, and the end crack penetration. Embedding distance: 300~500mm for short joints; The long seam is 500~800mm. When embedding, first apply a layer of structural glue about 2mm thick at the bottom of the grouting nozzle to paste the grout inlet hole of the grouting nozzle on the predetermined position across the seam. Sealing: seal the joint with structural adhesive, and apply a layer of structural adhesive about 1~2mm thick along the crack (30~50mm on both sides of the crack). Small holes and bubbles shall be prevented when applying glue, and shall be scraped flat to ensure reliable sealing. Sealing inspection: after the crack is closed, conduct air pressure leakage test to check the sealing effect. The leakage test shall be carried out after the structural adhesive has a certain strength. How to deal with the leakage of the expansion joint of the waterstop of the sewage pool? Contact * * waterproof and plugging company: first clean the foam, ointment or other fillers in the expansion joint to the waterstop Electric hammer Clean the expansion joint with clean water after roughening. Close and fill the expansion joint with hemp fiber for about 5cm. Then fill the expansion joint with water without leakage. Embed the grouting nozzle in the process of filling the expansion joint. 1、 The effect of slotting and plastering plugging is closely related to materials. Materials provide basic conditions and play a guarantee role for plugging technology. Materials with superior performance and high grade should be reflected in the use of technology. No matter what materials, they must match and adapt to the operation of plugging technology. Therefore, the materials selected for waterproofing and plugging in this project are: specially prepared and produced fast setting and expanding plugging polymer materials for plugging and repairing; Select the leakage point with large water leakage as the center to extend to both sides, and use the impact hammer or manual chiseling to form the V-groove, with the upper opening width of 6-10 cm, the high-level degree of 6-10 cm, the bottom of V as the crack, and the pipe diameter of φ 0.5-1 after the V-groove is formed Hose (Clamping strip) Carry out plastering evacuation and embed grouting holes. The spacing between grouting holes is 80-150 cm, and it shall be ensured that the grouting holes are overlapped in radius. 2、 Embed the grouting nozzle: the grouting nozzle is embedded in the slot with 4-6 branch PV pipes or cast iron pipes, cleaned, and stabilized in the slot with double quick cement or high-grade cement, with the burial depth not less than 2-4cm. 3、 After the grouting nozzle is buried at the closed leaking part, all other parts (within a certain range) that have water leakage or are likely to leak water, except for the grouting nozzle, shall be sealed to avoid slurry leakage and bleeding. 4、 The test injection shall be conducted after the leakage is closed and the grouting nozzle is buried and has a certain strength. Color water is used to replace grout during trial grouting to calculate grouting amount and grouting time, providing reference for determining grout mix ratio and grouting pressure. At the same time, observe the plugging and hole connectivity to ensure normal grouting. 5、 Install and inspect grouting machines and tools to ensure safe use in grouting construction. 6、 Select one of the holes for grouting (select the grouting nozzle at a lower place and with a large amount of water leakage). After the grout is found in the multiple holes, close each hole immediately and continue grouting. The grouting pressure should be greater than the leakage water pressure, so that the grout will burst forward along the seepage channel. When the grout is no longer injected, immediately close the grouting nozzle and then stop grouting. After grouting, the grouting hole and inspection hole shall be sealed tightly. After the grout has solidified, remove the grouting nozzle, observe the grouting plugging effect, and repeat grouting if necessary.
