Tunnelling Activities in Japan 2020

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Contents

　１．Constructing a Tunnel by NATM with Minimum 5m Covering Under a Dense Residential Area,
　　　while Considering the Surrounding Environment

　２．Neighboring Construction of a Long and Massive Mountain Tunnel’s Fault Crush Zone

　３．Construction of SCL Tunnel with Ground Freezing Underneath Existing MRT Tunnels in Singapore

　４．Construction of an Underground Passage with a Rectangular Shaped Muddy Soil Pressure
　　　Balanced Shield Machine

　５．Building a Crossing under Railway Using HEP&JES Method at a Terminal Station

　６．Overcoming Challenges: Small Overburden, Acidic Water, Construction Under a National Road

　７．Tunnel Construction in a Widened Section

　８．Construction Period Shortened with Precast Concrete for Mountain Tunnel Lining

　９．Excavating Mixed Rock, where Risk of Landslide is High

１０．Verification of Deformation During Excavation of Pelitic Schist and Effect of Countermeasures

１１．Drilling and Blasting Hard Ground Close to Rocks in Danger of Falling and a Railway Tunnel

１２．Tunnel Construction Directly Beneath a Residential Area

１３．Construction of Adjacent Tunnels Using the URUP Method

１４．Excavating the Shield Tunnels with the Largest Cross Section in Japan

１５．Construction of Large Section Shield Tunnel at a Location with Sharp Curve, Steep Slope,
　　　and Adjacent to Important Structures

１６．High-Speed Construction with Large Section Slurry Shield Method

１７．World's First Spiral Excavation Using H & V Shield Method

１８．Diverging the Slurry Shield Machine from The Narrow Shield Yard

１９．Simultaneous Installation of Two Caissons

２０．Japan's Largest Waterway Tunnel, which Reduces the Discharge of up to 600 m3/s

２１．World's First Use of Liquefied CO2 Freezing Method for Protection of Shield Arrival Area in Seabed

　　　　　　　　　　　　　　　　　

Innovations in Technology

２２．SP-MAPS®

２３．Cutting Face Projection Mapping System

２４．Geological Evaluation of Tunnel Face Using Artificial Intelligence

２５．Development of an “Excavation Cycle Evaluation System” using Artificial Intelligence that
　　　Automatically Recognizes Tunnel Face Works

２６．Automatic Tunnel Geological Condition Analysis System Using Multi-Spectral Images

２７．Tunnel Face Stability Prediction System "TFS-Learning"

２８．Face Condition Viewer

２９．Face Collapse Detection System: Rock Fall Finder

３０．Guidance System to Enhance Productivity of Scaling

３１．Starlight Sensor System to Detect and Control the Height of Placed Lining by Light…

３２．Geological Evaluation Technology for Rock Tunnelling Using ICT

３３．Steel Arched Support Erection Robot

３４．Fore-Plate Method

３５．Automatic Calculation of Appropriate Amount of Explosive for Tunnel Blasting Based on Drilling
　　　Data in Excavation

３６．Full Precasting of Large Underground Structures Using Circular Segments

３７．Development of The Next Generation TBM Equipped with Conventional Tunneling Mode…

３８．Exclusive Rock Bolt Placement Machine that Realized Full Mechanization of Drilling,
　　　Mortar Injection, and Rock Bolt Insertion

３９．High-Fluidity Concrete with Low Cement Content “Neuro-Crete Neo®”…

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