description

The precast concrete ring is driven from the entrance shaft of the micro tunnel boring machine. For long driving, too much resistance may damage the concrete ring or slow down the progress of the micro tunnel boring machine. Therefore, an intermediate station should be installed and used to take over the thrust exerted on the starting shaft.

Product advantages

Erosion resistance: water, foam, mud, etc...

Stress resistant

Good lubricity

Biodegradability

In line with the concept of sustainable development, in line with environmental protection requirements

Certified by the tunnel boring machine manufacturer