Tunnelling Activities in Japan 2022

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Contents

　１．Construction of a Watertight Tunnel in Consideration of Environmental Protection for Wetland
　　　Registered Under the Ramsar Convention - The Hokuriku Shinkansen, the Miyama Tunnel -

　２．Breakthrough of a Long Tunnel by Geological Evaluations Combined with Various Types of
　　　Forward Exploration - Hokuriku Shinkansen New Hokuriku Tunnel(Okunono Construction Area) -

　３．Excavation directly under the main road in an urban area using the mountain tunnelling method
　　　with pipe roofing - Kyushu Shinkansen West Kyushu Route, Isahaya Tunnel -

　４．Excavation of a Large-Section, Deep shaft Using a Diaphragm Wall and Chemical Grouting

　５．Repairing the Pilot Tunnel of the Seikan tunnel Tappi Pilot tunnel Repair Works

　６．A large-scale 920-meter-long subway station extension improvement project
　　　using the three-dimensional urban planning system

　７．Square Element Propulsion Method Applicable to Large-Section Horseshoe Tunnels in
　　　Trenchless Areas of Stations

　８．The work of large-scale cross-section expansion of underground station constructed with
　　　pneumatic caisson method

　９．Construction of a Mountain Tunnel under Obstacle-Spotted Areas on Sandy Ground with
　　　Overburden

１０．Mountain Tunnel Construction Using ICT

１１．Countermeasures against swelling of in-service tunnels using precast inverts

１２．Breaking Through the Complex Geological Formations along the Median Tectonic Line with 3D
　　　Computerized Construction

１３．Overcoming mountain tunnels under strong ground pressure with a round triple support structure

１４．ICT construction of a mountain tunnel that obtained Collaborative Safety 2.0 certification

１５．Excavation of Phase II Tunnel by Early Cross-Sectional Closure at Distance of 0.85m
　　　from In-Service Tunnel …

１６．Large-Section Shield Tunnel Excavated Directly Beneath Runway in Service Tokyo International
　　　Airport Tunnel

１７．Construction of a Large-Scale Composite Box Culvert Encompassing a Complex System of
　　　Intertwining Ramps

１８．Immersed tunnel in the Tokyo coastal area that shortened the construction period Uminomori
　　　Tunnel in Tokyo Port

１９．Underground connection to the existing tunnel using a slide hood

２０．22.5% uphill electric cable tunnel by mud-pressure shield in composite ground containing
　　　weathered granite

２１．The construction of a long-distance deep shield passing through central Tokyo

　　　　　　　　　　　　　　　　　

Innovations in Technology

２２．Trial Inspection of Finished Dimension by 3D Laser Scanner

２３．Inspection of Tunnels Using a Running Vehicle with Tunnel Lining Surface Imaging Technology

２４．Tunnel Disaster Prevention Facilities in Tokyo Meropollitan Expressway

２５．Development of Next Generation Tunnel Construction System: Remote control Technology for
　　　Shotcrete

２６．Remote Control Technology for Applying Shotcrete“ T-iROBOTM Remote Shotcreting”

２７．Shield construction using AI to improve efficiency and quality - "AI Transform Shield

２８．Light-Weight Steel Pipe for Forepiling Made with High-Strength Material“ AGF Tuff & Light”…

２９．Development and application of automatic construction system for tunnel-secondary lining

３０．Continuous concrete pouring system using extending/retraction-type hose to improve quality and
　　　save resources while placing lining concrete in tunnels

３１．“A.E.s.SLic” AI Technology that Automatically Evaluates the Surface Quality of Lining Concrete

３２．An Automatic Tunnel Lining Concrete Construction Robot System for Practical Use

３３．“Spacepack®”: A Tunnel Lining Backfill Grouting Method

３４．Automatic Spreading System of Long Waterproof Sheets

３５．Measurement System for Groundwater Inflow Rate and Pressure in Advanced Boring
　　　― T-DrillPacker®

３６．MOLE-FMR (Field Mixed Reality) & FCM (Field Crack Mapping)
　　　― MR Aided Tunnel Inspection System ―

３７．Adopting“ Safety 2.0” to Construction Work

３８．Blast Master: The System that Reduces Excess Digging and Makes a Smooth Excavation Surface

３９．An On-site batcher plant that automatically controls concrete mixing temperature Smart Batcher
　　　Plant ®

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