Heading

• Six Methods for Groundwater Control in Shaft Excavation
• Verification Items During PS Anchor Testing
• Technical Inheritance and Digitization for Large-scale Excavation
• Strength Specifications for Shotcrete on Slopes
• Grouting for Groundwater Treatment in Upward PS Anchor Holes in Underground Power Plants Arches
• Standards for Groundwater Treatment in PS Anchor Holes in Underground Power Plants Arches and Water Stopping
• Measures to Improve PS Anchor Cycle Time
• Causes of Variability in Load Measurement Values of PS Anchor Load Cells
• Encountered Expansive Mudstone Geology During Tunnel Construction
• Planned Layout for Underground Power Plant Work Shafts in Mudstone Geology
• Historical Changes in Japan's Underground Power Plants
• Rain Measures Unique to Tropical Rainforests
• Curtain Grouting Above the Underground Power Plant Cavern
• Tunnels Using NATM Method
• The underground cavities excavated for power plants in mudstone geology.
• Upward Drilling and Insertion of PS Anchors
• Management Values for Elongation During PS Anchor Tensioning
• Points to Note During Manufacturing of Covering formwork of Large sectional Arch Lining Concrete
• Fundamental Technologies for Underground Power Plant Cavern Construction
• Rapid-setting Materials for Shotcrete
• Shaft Winch Repairs Completed After an Accident
• Concrete Placement for Water Pressure Steel Pipe Shafts
• Special High-altitude Work Vehicles Used at Underground Storage Base Sites
• Standards for Concrete Placement in Arch Linings for Underground Power Plants
• Basic Review of Changed Underground Power Plants Construction Plans
• Vibration Control from Blasting at PS Anchor Anchorage Sections
• Causes of Increasing Load Cell Values of Upward PS Anchors in the Arch Sections of Underground Power Plants
• Safety Factors Used in Underground Power Plants Cavern Design
• Management Standards for Excavation in Underground Power Plants Arches
• Rock Support for Large-section Underground Power Plant Arches
• Management Standards for Wire Elongation During PS Anchor Tensioning
• Analysis of Underground Cavities
• Filling of Over Cutting Tunnels
• Blasting for Invert of Large-section Tunnels
• Drilling Diameter for Rock Bolts and Method of Grouting
• Downward Installation Angle of Sidewall Rock Bolts and Mortar Filling Behind Washers
• Concrete for Large-section Diversion Tunnel Linings
• Displacement Measurement Associated with Tunnel Excavation
• Days Required for Arch Lining Work in Underground Power Plant Caverns
• Installation of Upward Rock Bolts
• Measures to Prevent Fall of rocks at Tunnel Faces
• Evacuation During Tunnel Blasting
• Form Removal Time and Concrete Strength for Large-section Tunnel Arch Concrete
• Preparation of Construction Plans for Large-section Diversion Tunnel Linings
• Details of Covering formwork for Large-section Tunnel Arch Lining
• Concrete Placement for Large-section Tunnel Arches
• Reinforcement Assembly for Large-section Tunnel Arches
• Pre-investigation and Displacement Measurement Plan Before Starting Underground Power Plant Caverns
• Management Standards for Elongation Values During Tensioning of PS Anchors in Underground Arch Sections
• Geothermal Measurement Inside Tunnels
• Differences Between Load Cell Indications and Tension Jack Readings for PS Anchors
• Installation of Underground Displacement Gauges
• Investigation of a 100-year-old Power Plant Waterway Tunnel
• Cutting Slope Protection Works at Tunnel Inlets
• Groundwater Amounts Feasible for Shaft Excavation and Sheet Piling for Shafts
• Construction Considerations for Water Conveyance Tunnels and Water Pressure Pipe Shafts
• Secondary Grouting Below PS Anchor Packers
• Grouting Construction Plan for Power Plant Waterway Tunnels
• Turbidity Treatment Facilities for Power Plant Construction and Tunnel Inlet Construction and Slope Cutting
• Lahar Layer Water Pumping and Pump Test Inside Shafts
• Measurement Management Plan for Large-section Tunnels in Shirasu Soil
• Preparations Before PS Anchor Installation
• Verification After Completion of PS Anchors in the Underground Arch of the Power Plant