What should I pay attention to when burying rubber expansion joints into the ground?

In special pipelines need rubber expansion joint connection, such as roads, bridges, this time can not be set on the ground or in the air, only the rubber expansion joint buried in the ground to use.
After the rubber expansion joint pre-buried pieces of ground, it is likely to get heavier squeezing working pressure than on the road, when passing through the case, this time the rubber expansion joint gets the key is very large, very easy to cause the rubber expansion joint is crushed.
If the problem of leakage occurs in the process of underground use, it is very troublesome in terms of maintenance. Therefore, when installing rubber expansion joints underground, special devices should be installed to protect the rubber joints in order to prevent a great deal of gravity from crushing the rubber joints, and for sealing problems, it is important to apply unique raw materials to it for secondary sealing in order to avoid its leakage and prevent the carrying out of maintenance.
Because the work is carried out underground, as long as we operate in a reasonable and standard way, then the rubber soft joints can be used between 3~4 years, of course, all these should exclude some external factors of damage and interference.