H-shaped steel sheet pile wall
Hardenable synthetic resin composition and its use
Hardened material supported rock bolt and apparatus for installi
Heading shield
Hermetic load distributor mat
High capacity tieback installation method
High face-area low-volume concrete wall block, form and method
High lift temporary roof support for mines
High shear strength clay liner, method and apparatus for its pro
High strength corrugated metal plate and method of fabricating s
High strength corrugated metal plate and method of fabricating s
High tensile strand, anchorages and methods of installation ther
High vacuum extraction of soil contaminants along preferential f
Hole filling and sealing method and apparatus
Hole shoring system
Hollow bars and method of manufacture
Hollow rod and method of making and using
Horizontally-yielding earth stabilizing structure
Housing for a support shoe in a trench falsework
Hydraulic advancing support frame