Tunnelling Activities in Japan 2018

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Contents

　１．Streamlining the Boring of an Urban Railway Tunnel by Using Two Methods Jointly,
　　　SENS and Shield Tunneling

　２．Heaving of roadbed Countermeasures in Squeezing Ground

　３．Construction of a shield tunnel under an operating railway track

　４．Improvement Project for Kiba Station on the Tozai Subway Line

　５．Construction of an underground passage with small cross-section under railroad tracks
　　　by covering with steel plates

　６．Ultra-large cross section tunneling by widening from inside -Isshiki Tunnel,
　　　Chubu Odan Expressway-…

　７．Tunnel drilling in weak ground using the Early Cross Section Closure Method

　８．The Largest Shield Tunnel Project in Japan

　９．Construction of a road tunnel of the world’s largest class directly beneath a railway station using
　　　the R&C Method

１０．World’s First Application of Underground Large Diameter Tunnel Widening Technology Using
　　　Enlargement Shield Tunneling Machine

１１．Construction project on the Namboku Route close to the Port of Tokyo

１２．Restoration of a Mountain Tunnel Damaged in the 2016 Kumamoto Earthquake

１３．Construction of a long-distance deep shield that passes through the central part of the Tokyo
　　　Chiyoda Trunk Line Project

１４．Direct excavation of RC structures with a shield machine and construction of a sharply curved
　　　alignment

１５．Construction of a shaft and a water-tight pressure tunnel with a large cross-section in a lake

１６．Widening of an extremely large underground cavity from small aqueducts

１７．Construction of an Underground Power Plant by Remodeling an Existing Plant

１８．Construction of a gas pipeline using small cross-section shield tunneling for rocks under high
　　　water pressure Construction of A-1 Nabiki section for Toyama pipeline

　　　　　　　　　　　　　　　　　

Innovations in Technology

１９．Development of an Upward Shield Machine Retrievable Through a Tube

２０．Hard Rock Tunnel Boring Machine TM-100 Applied to the boring of hard rock with a uniaxial
　　　compressive strength 100 MPa

２１．FSC-100, machine drilling of an extremely long pilot hole

２２．Technology for measurement of potential water inflow collected ahead of the tunnel face

２３．High-compactability concrete: Concrete that enables economic construction of high-quality lining

２４．Reduction of water inflow into tunnels, using ultrafine cement

２５．Rock Grouting Technology for Redcucing Groundwater Inflow in Deep Underground

２６．New energy-saving cutter structure for large section shield machines for rapid construction

２７．Construction of an underground discharge duct with prefabricated steel-concrete composite
　　　segment rings along a 3D composite curved path for deep a discharge conduit at pumping station

２８．Shaft type remote control underwater machine T-iROBO UW

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