Complex sentence: The Tunnel Boring Machine is expected to be delivered to the site in 2018, after boring the machine will also be adding the circular concrete segments will be added which are delivered into the tunnel via mine cars one at a time.
Split into simpler sentences: The Tunnel Boring Machine is expected to be delivered to the site in 2018. After boring the machine will also be adding the circular concrete segments which will be delivered into the tunnel via mine cars one at a time.