Grouting of settlement joints in coal conveying corridors and plugging of expansion joints in underground corridors
In view of the problems of grouting leakage filling of settlement joints in coal conveying corridors and plugging of expansion joints in underground corridors, the following are the recommended treatment steps:
1.Finding out exactly where water leaks and leaks are located can be done by observation and detection.
2.When filling the settlement joint, it can be done using flexible grouting technology. The use of chemical grouting materials, such as epoxy materials, can adapt well to the deformation of the base layer, and these materials have good permeability and can fully infiltrate the inside of the gaps. At the same time, these materials still have good flexibility after curing, which can prevent water leakage due to deformation such as re-sedimentation at a later stage.
3.When dealing with the expansion joints of the underground corridor, the debris in the expansion joints should be cleaned up first to ensure that they are dry. Then, the expansion joints are hardened using a plugging agent. Then, a waterproof mortar is used for leveling and flexible plugging treatment. Flexible plugging materials with strong adaptability and good deformation ability should be selected, such as two-component polyurethane waterproof coatings, which can adapt to the micro-deformation of concrete building structures, resist the thermal expansion and contraction of buildings, and have good resistance to humid environments.
The above advice is for reference only, if you still have doubts, it is recommended to consult a building engineer or check out the relevant construction books. The following steps can be adopted for the plugging treatment of expansion joints in underground corridors:
1.After finding the leakage point (joint), remove the tiles within 20cm on both sides of the crack so that the waterproofing construction can be better.
2.After the cracks are cleaned, they are filled with cement slurry and allowed to dry.
3.To apply waterproof coatings, you can choose JS waterproof coatings or polyurethane waterproof coatings. The scraping method should be even, and wait for the waterproof coating to dry completely.
4.At the joints between the new tiles and the old tiles, apply a waterproofing material of the same color as the old tiles. Paste new tiles and do not wash them with water for 24 hours.
In addition, if the situation is serious, it is necessary to remove all the concrete, draw lines on both sides of the crack to mark the location and direction of the joint, please design a suitable waterproof construction plan according to the shape of the joint, and then repair.
The above steps are for reference only. For more information, it is advisable to consult a person.
Grouting of settlement joints in coal conveying corridors and plugging of expansion joints in underground corridors