|
2017
|
Invention
|
Compressible group mix for use in absorbing compressive or deformation stresses. The present inve... |
|
2016
|
Invention
|
Annular fill compressible grout mix for use behind pre-cast concrete segment installed in time de... |
|
|
Invention
|
Compressible grout mix for use in absorbing compressive or deformation stresses of subterranean f... |
|
2010
|
Invention
|
Clip for joining steel ribs used as tunnel liner supports. The present invention is directed to a... |
|
2009
|
Invention
|
Steel liners for tunnels. The present invention is directed to a steel segment assembly for linin... |
|
|
Invention
|
Door arrangement for a tunneling machine. The present invention provides a door arrangement for a... |
|
2006
|
Invention
|
Ground water treatment system. The present invention provides for an apparatus to treat water to ... |
|
1996
|
Invention
|
Tunnel digging machine. A tunnel digging apparatus has an undercarriage pivotally attached to a m... |
|
|
Invention
|
Tunnel boring machine. The present invention relates to a tunnel boring machine having a cutting ... |
