Explaining the construction technology of drain pipe closing water
道闭水的施行工艺讨论 Discussion on the implementation process of closed water drainage pipes
Drainage pipeline inspection: The plastered surface is the key process of anti-seepage in the well chamber. Often, the seepage of the well is caused by the leakage of the hollow drum or crack in the plastered surface, so the plastered surface should be constructed according to the five-layer method of waterproof plastering. In front of the wipe, the brick wall surface should be cleaned and cleaned with plenty of water and so on.
Although the drainage inspection well is a subordinate structure of the pipeline project, the leakage of the well chamber will also affect the anti-seepage effect of the entire pipeline. We should all understand the reason that the Qianli Embankment was destroyed in the ant hole.
Next, the professional staff of the cement product factory will introduce the concrete implementation process of the drainage pipe to the water for us.
Cement products factory
View masonry of a well
The gray joint mortar should be plump to prevent water seepage between the gray joints between the bricks.
View well's pasta
The plastered surface is the key process of anti-seepage in the well. Often, the seepage of the well is caused by the leakage of the hollow drum or crack in the plastered layer. Therefore, the plastered surface should be constructed according to the five-layer method of waterproof plastered surface. The surface of the brick wall should be cleaned and moistened with water.
The five-layer method is: one layer is cement paste, about 2mm thick, and the second layer is wiped when the slurry surface is not flooded; two layers are cement mortar about 5-7mm thick, and three layers are wiped after initial setting; three layers It is cement paste, and the fourth layer is cement mortar; before the initial setting, the next layer of cement paste is rubbed, and the four layers are compacted to catch up. After surviving, cover the wellhead with plates, hang straw bags or other coverings inside, and insist on watering for maintenance.
The contact part between the cover plate of the well chamber and the brick surface
When hoisting the cover plate, the seat slurry must be plump. If it is cast-in-place, it should be paved with a layer of cement mortar of the same label before pouring the concrete.砼 Cover.
In the trench backfill construction, sometimes such a situation is encountered, that is, the water-closing test is qualified, but the leakage still occurs after a period of use, and the subgrade soil is washed out and subsided. A lot was found in the review because the trenches were not operated in accordance with the technical specifications.
Therefore, after the closed water test is qualified, the backfilling of the trench should also be taken seriously. The backfilling of the gravel at the top of the pipe can only be carried out after the pipe seat 抹 and the tape mortar have formed a certain strength, and the sand cannot directly impact the pipe body. Sand and gravel must not contain hard objects such as large gravel bricks. Both sides of the pipe should be backfilled and tamped at the same time. Layered backfill compaction above the top of the pipe will make the fill constitute a whole and play a role in dispersing the unloading force in the vault. To maintain the safety of the pipe body.