Research experiments have shown that the faults of medium and low voltage power cables in buildings are mostly caused by faults in the intermediate joints and terminal heads of the cables, as well as poor sealing and moisture infiltration, resulting in a decrease in insulation strength. However, the medium and low voltage power cable network mostly adopts a tree shaped power supply method, with a large number of cable terminal heads. In response to this situation, the cable waterproof sealing method is adopted for the sealing of structural damage points with small seepage areas. Next, let's take a look together.

　　Cable waterproofing and sealing method:

　　(1) Plugging materials

　　 There are many types of sealing construction materials for cable waterproofing and sealing, commonly used are: sealing agent and sealing king. This type of building material is based on cement and mixed with chemical learning materials such as accelerators and catalysts, which can rapidly increase the solidification and strengthening of enterprise materials. Due to the addition of additives, although it can solidify quickly and improve strength, the shrinkage starts to accelerate in the later stage, which can easily lead to the appearance of such cracks at the repair site, causing the repair point to quickly fail. Therefore, in recent years, pure cement slurry has often been used to directly plug leaks. The cement used is ultra early strong setting cement, double fast cement, and self leveling fast setting cement. Mainly through the characteristics of cement initial setting block, which can take 5-8 minutes, and final setting for 10-12 minutes, the initial and final setting time is short, the strength continuously increases quickly, and there is a certain degree of influence on the refinement, providing good maintenance and management effects. Therefore, there have been many research and application problems in recent times.

　　(2) Construction

　　During the construction process of cable waterproofing and sealing, for the insertion point, we cut it into a horn hole with a diameter of about 8-15cm and a depth of 6-10cm, with a pointed inner circle. We first pick the hole and clean the surrounding wall with water, then mix the sealing material with water to make it semi dry and hard, friction it into a column, and then use a thin water slurry brush to quickly remove the hard block. We quickly block the hole, surrounding wall, cement, and wall concrete, and can loosen it after hardening. After general treatment, if there is no water seepage, it is considered successful sealing. Once water seepage occurs, you must chisel it out before filling it up.

　　For seams and cracks, first cut the straight lines between the seams into serrated grooves along the direction of the seams. Except for the water seepage area, other parts shall be treated according to the above method first, and the water seepage area shall be treated before centralized treatment. The method of waterproof sealing with quick setting cable shall be used for waterproof sealing, and after mixing, it shall be quickly hardened, rolled into thick strips, and immediately pressed into the seepage area. Make the appeal penetration point achieve the purpose of plugging the leak.

　 Although the penetration point can be quickly blocked, playing a role in surface water seepage, water is still inside the structure, and over time, the impact on the structure is significant. Corrosion and freeze-thaw of steel bars can damage the underground structure. However, the specific methods used to deal with the specific situation are described above. The above is an introduction to the construction method of the cable waterproof sealing method, hoping to be helpful to you.