How to solve the blockage phenomenon encountered by through-wall casing?

How to solve the blockage phenomenon encountered by through-wall casing?
Through-wall casing, as a kind of pipe that needs to be buried in advance, is believed to be no stranger to many workers in the engineering industry. The phenomenon of blockage. So how to properly deal with the clogging problem encountered by the repaired through-wall casing?
Method 1: Fill in advance with filler.
As the through-wall casing generally needs to be installed together with the foundation civil construction in the actual construction process, some soft filler should be used for filling before the foundation civil construction is installed and concrete is poured. This measure can effectively prevent the occurrence of blockage caused by mortar and other substances entering the casing in the process of concrete pouring. Method 2: Welded steel plate seals one end of the casing.
Through-wall casing has excellent performance and can be installed and used under various harsh site conditions, and the casing can also be used in basement environment. However, to prevent blockage of the casing used in the basement, the exposed casing mouth during the prefabrication of the wall casing is best sealed with welded steel plates until it needs to be installed and then unblocked.
 
Method 3: Taping seal on exposed casing
For installation in the wall or through the floor, roofing through the wall casing, it is best to leave openings in the foundation civil construction, to be completed after the construction of the overall structure and then buried through the wall casing into the part. Moreover, when installing wall casing in the reserved position, the two sections of the casing must be sealed with tape or other sealing materials before formal installation to avoid blockage caused by foreign objects entering the casing during the installation process. The above content is the correct solution to prevent the clogging of through-wall casing. Every engineer who needs to use efficient professional through-wall casing wants to make the casing play a convenient role in its application, so in the actual installation process, we must take the right measures and pay attention to every construction detail to eliminate the existence of clogging of through-wall casing.