SUBJECT
Tunneling
Electronic books
10
Underground construction
10
Excavation
9
Tunnels
8
Soil mechanics
6
Congresses
5
Rocks
5
Design and construction
4
Earth pressure
4
Engineering geology
4
Retaining walls
4
Rock excavation
3
Rock mechanics
3
Analysis
2
Culverts
2
Foundations
2
Highway engineering
2
Landslides
2
Prevention
2
Testing
2
Aqueducts
1
Boring machinery
1
Cities and towns
1
Design
1
Environmental aspects
1
Equipment and supplies
1
Mining engineering
1
Nuclear excavation
1
Rock-drills
1
Specifications
1
Subways
1
Technological innovations
1
Trenchless construction
1
Underground areas
1
Waste disposal in the ground
1