What Is A Shield Machine Tail Seal?

Let us first popularize what is a shield machine? 

DSH Seals tells you that a shield machine is a construction machine that can not only support the 

pressure of the formation, but also excavate in the formation. The construction of the urban subway 

using the shield machine method is to use the assembly machine to assemble the prefabricated 

segments into the tail of the shield machine with the shield excavation for a certain distance (usually 1.2 

meters or 1.5 meters), and then continue to excavate and then assemble. , again and again. In order to 

ensure that the inside of the shield and the outside of the shield shell are completely closed and shield 

construction personnel, shield machines generally have three types of seals: shield machine tail rubber 

seals, hinged seals and main bearing seals. 

So, how does the rubber seal at the tail of the shield machine achieve good results?

The shield tail seal is an encapsulation measure set up to prevent soil sand, groundwater, slurry injected 

from the back, mud water and soil on the excavation surface from flowing into the shield from the gap 

between the shield tail and the segment. The shield machine tail seal usually uses three rows of stainless 

steel wire brushes: and the shield machine tail seal grease is injected between the steel brushes for 

real-time filling to achieve a good sealing effect.