In the tunnel projects, the diameter will reach 6-7 meters, and some one even 14 meters. So most of us will confused. How to install this big rubber seal?
First, before construction, we have pre-buried steel ring. At the edge of each exit seal has small holes. Each five degree has one. Total one piece has 72 holes.
Second, set up the landing stage of scaffold. The landing stage material is diameter 48mm steel pipes. At the same time, the workers can clean the pre-buried steel ring's bolt holes. Then each holes install one bolt.
Thirldly, put the exit seal on the bolts. The seal's holes on the bolts.
Fouth, install the round ring, this is to protect the seal.
Finally, install the fold type pressing plate. The pressing plate is made of 2mm thickness steel plate. Each ring has 17 sets of pressing plates.
