Tunnel
Boring
Machines

English2023.6（1）Our mission

We do more than just excavate tunnels—
we create new spaces
for the growth of humanity
On October 1, 2021, Kawasaki Heavy Industries, Ltd. and Hitachi Zosen Corporation merged their
TBM (tunnel boring machine) business via a joint incorporation-type company split to create
Underground Infrastructure Technologies Corporation (UGITEC).
This merger brings together both company’s half century of TBM technology and experience, both inJapan and overseas. This allows UGITEC to provide customers with solutions and services perfectly
tailored to any challenge or need.
UGITEC is boldly working to become the preeminent solutions provider in underground space

1

Table o f Co n ten ts
Our mission

1

History3

development, contributing to the advancement of underground infrastructure and the creation of a

Geological Map and Cutterheads

5

more sustainable society.

Technology, Products, and Achievements

7

We sincerely thank you for your continued support.

• Slurry TBM

7• EPB (Earth Pressure Balance) TBM

9• Hardrock and Boulder TBM

11• Various TBM

12• Rectangular TBM

15• Special TBM

17• Cutter Exchange

23• High-Speed Excavation

25• Hardrock and Boulders

26

Units Delivered

27

Network

29

2

1957

2006

2016

2019

Roof TBM delivered(Φ11.6 m)

1988

TBM goes into use(Φ8.78 m)

1994

2004

Open TBM delivered(Φ12.84 m)

APORO cutter TBM
delivered(W10.64 m × H7.44 m)

This first machine led Kawasaki to become aThis machine capable of boring through soft

This machine was used to excavate theThis machine was used to construct the Hida

This machine was used for underground

This machine was used for the Tachiai River

conduit tunnel connecting the Sada River andleading developer and manufacturer of TBM.

ground and hardrock was used for theundersea tunnel section of the Trans‐Tokyo Bay

Tunnel on the Tokai-Hokuriku Expressway. TBM

construction of the Tokyu Toyoko Line from

Rainwater Conduit Development Project. The

Koishiwara River in Fukuoka Prefecture’s Chikugo

It was the first application of the roof shield

excavation of the Channel Tunnel. It contributed

Expressway. It boasted the largest diameter ofare equipped with a roller cutter on the anterior

Shibuya Station to Daikanyama Station.

spiral tunneling method involves running two

River system. In addition to hardrock, the projecttunneling method to a subway tunnel project insignificantly to the success of the project,

any TBM in the world at that time. The machine

surface of the cutterhead, which is used to cut

A non-circular shield was needed in order to

TBM side-by-side which, as they progress,

was made even more difficult by the 2.0 MPa ofJapan. This machine was used to excavate acompleting excavation of the planned 16 km

was used to dig two 10 km tunnels, one atop

through solid rock mass. Since their

keep as much distance as possible between thechange positions with one another in a spiralingplanned water pressure, but with the use of two

231 m section of the Marunouchi Line running

section a full eight months ahead of schedulethe other. It was called a “slurry machine”

introduction, they have been modified to handle

sewerage piping and the tunnel. The

fashion, moving from a side-by-side alignment

machines incorporating cutting-edge technology

from Kokkai-gijidomae Station to Shinjuku.

and then excavating an additional 4 km whenbecause it mixed the excavated soil with watera wide range of soil geology, not just hard rock.

bi-sectional cutterheads on the machine rotate

to a top-and-bottom alignment and vice versa.

borne from many years of experience, a total

requested.

to create slurry and discharge it.

1960

1970

1980

Slurry TBM delivered(Φ14.14 m)

1990

World’s first spiral tunnelingusing H&V method(W11.79 m × H5.85 m)around one another in a circle as they spin.

2000

Excavation completedof hardrock with planned waterpressure of 2.0 MPa (Φ2.99 m)
This machine was used to construct a watertunnel length of 5 km was excavated.

2010

2020

More than half a century of TBM.
Capitalizing on reliable technology to create new underground space.
From railways and roads to underground rivers and enormous underground cities, the potential for underground

History

space is limitless. And in order to carry out the excavation work to create these underground spaces, you needtunnel boring machines (TBM). Thanks to their outstanding technological strength, Kawasaki Heavy Industries andHitachi Zosen have led the industry for more than half a century.
Now, these two companies have merged their TBM business to develop more robust technological strength and awider range of operations enabling the creation of new and innovative underground space.

1970

3

1980

1990

Start of TBM
production (Φ2.7 m)

World’s first multi-face
TBM (Φ7.42 m x 12.19 m)

Hitachi Zosen made use of its shipbuilding
technology to develop and manufacture the first
open, hand digging-type TBM. This represents

the world’s first multi-face TBM equipped withTrans‐Tokyo Bay Expressway (Aqua Line) andthe start of TBM history at Hitachi Zosen. It was

two cutterheads. Because it was able to buildused in sewerage construction in Yokohama

2000

2010

2020

World’s first tri-sectional
multi-face TBM delivered(Φ7.8 m x W17.3 m)

Pressurized hardrock slurry
TBM delivered (Φ7.85 m)

This machine was used to construct theWork completed on slurry
TBM with largest diameterin the world (Φ14.14 m)

Used to construct the Marmaray Tunnel in

EPB TBM with largest
diameter in the world
delivered (Φ17.45 m)

Kyobashi Tunnel on JR East’s Keiyo Line. It wasThis slurry TBM was delivered for use on the

Hitachi Zosen completed production of the

Istanbul, Turkey. This machine, which operated

Used to construct Seattle’s State Route 99

Rectangular TBM withbi-sectional synchronized
retractable cutter delivered(W7.29 m × H4.69 m)world’s first tri-sectional multi-face TBM, whichusing high-speed rotation and was able totunnel in the U.S. This machine incorporated aThis machine was used to construct thewas the largest of its kind at the time. It waswas capable of simultaneously excavating rail

pulverize hardrock, helped to build a railway

variety of then-cutting-edge technologies andpassageway tunnel from Ginza Station to the Ginza

multiple tunnels at the same time, it helped toequipped with originally developed fullyline tunnel space and platform space. It was

tunnel that connects Europe and Asia.

had the largest diameter for a machine of its

cut down on construction costs.

automatic segment assembly, which greatly

used to construct Osaka Business Park Station

kind at the time.

cross section was needed in order to make effective

1967

1987

accelerated the rate of construction. Of theon Osaka Municipal Subway’s (now Osaka
Metro) Nagahori Tsurumi-ryokuchi Line.

2011

use of the limited underground space beneatheight machines used for this project, this one

2005

Six shopping complex. A TBM with a rectangularCity.

was used to excavate the longest section.

1993

1994

2021

Establishment of UGITEC

Ginza. It was able to excavate a tunnel a mere 2.6 m
beneath the surface of a metropolis without having
any effect on the ground above.

2015
4

We can accommodate everything from small to ultra-large diameters,
deep or long-distance excavations, highly specific tunnel cross sections,
sharp curves, and much more with a diverse lineup of more than

2,700 proven machines.

Silt & Clay5

Sand

GravelRock
6

Technology, Products, and Achievements

Slurry TBM

A slurry mixture is circulated inside the cutter chamber, with the slurry pressure being used to stabilize theface and facilitating safe excavation through solid rock mass. The excavated earth is mixed with the slurry
and transported as liquid up to the surface where treatment equipment separates it into slurry andsediment. Slurry TBM adapted for large diameter/high water pressure-bearing tunnels are perfect forhandling seabed and riverbed tunneling and other projects with similarly harsh operational requirements.
The largest machine we have manufactured has a diameter of 14.14 m.

2017

Kanagawa Prefecture, Japan

Yokohama Ring Expressway Northwest Route
Tunnel Construction
Project ownerCity of Yokohama Road Bureau

Contractor

Hazama Ando/Iwata Chizaki/
Toshida/Miyamoto Doboku JV

2003

Machine outer dia. 12.64 m
Excavation length 3,889 m
Features

Tokyo, JapanTokyo Metropolis Katsushima Pumping Station
Conduit Construction
Project owner

Japan Sewage Works Agency

Contractor

Kajima/Maeda/Ando JV

Machine outer dia. 8.99 m

Simultaneous excavation,no backup car

Excavation length 383 m
Mechanical bit exchanging device,
steel pipe pile cutterhead

Features1994

Kanagawa Prefecture, Japan

Trans-Tokyo Bay Expressway Kawasaki Tunnel Kawajin North (No. 1) Construction
Trans-Tokyo Bay Expressway Central Tunnel Kawajin North (No. 1) Construction
Trans-Tokyo Bay Expressway Central Tunnel Kisarazu North (No. 1) Construction
Trans-Tokyo Bay Expressway Kawasaki Tunnel Ukishima North (No. 1) Construction
Project ownerTrans-Tokyo Bay Expressway Corp.

Contractor

Kajima/Konoike/Sumitomo JVNishimatsu/Toda/Zenitaka JV
Maeda/Tekken/Fujita JV
Kumagai/Hazama/JDC JV

Machine outer dia. 14.14 m
1,800 m2,100 mExcavation length
2,419 m
2,500 mFeatures7

Automatic segment assembly system

Slurry TBM use pressurized
slurry circulated inside the cutter
chamber to cut through rockmass, which prevents collapse of
the face. The excavated earth istransported as a liquid up toslurry treatment equipment,
which separates it into slurry andsediment. The slurry is carriedback to the face as part of an
integrated, sequential system.
The pressurized slurry, mud film,
and cutterhead interact
synergistically to counter theearth and groundwater pressure
and stabilize the face.

System Flow

FeaturesSlurry TBM adapted for large diameter/thick earth cover/highwater pressure-bearing tunnels are perfect for handlingseabed and river tunneling and other projects with similar
operational requirements. Because the excavated earth istransported up to the surface as slurry (a liquid), it can becontinuously extracted, and because the lubricating effect of
the slurry reduces abrasion for the excavating member, themachine can be operated over longer distances.

Achievements
We have a great deal of experience from 2 m-classsmall-diameter to large-diameter tunneling. Examples oflarge-diameter machines we have delivered include a φ
14.14 m unit for the Trans-Tokyo Bay Expressway, a φ12.64
m unit for the Otsu Floodway, and a φ12.34 m unit for the
Kawasaki Shibukawa Reservoir.

Regulatingtank

P1 pumpspeed controller

Treatment
plant

P1

G.L.
W.L.

Flow meter

Earthand water Earth and water pressure: P
pressure: P Added pressure: ∆p

Pressuregauge

Density meter

Pressure maintenance valve
Slurry inflow

P2

Slurry outflow

PE8

Technology, Products, and Achievements

EPB (Earth Pressure Balance) TBM

Excavated soil is stored inside the cutter chamber, where it is combined with an additive and mixed toundergo plastic fluidization, thereby facilitating stabilization of the face under earth pressure for safe
excavation through solid rock mass. The soil is carried out via a screw conveyor. The shield configuration canbe adapted for highly water-permeable hardrock, shallow earth covering, boulders, and a wide range of othersoil conditions and difficulties. A ribbon screw conveyor transports coarse gravel and other types of groundsoil. The largest machine we have manufactured has a diameter of 17.45 m.

2011

Osaka Prefecture, Japan

Yamatogawa Route Tunnel Construction
Project owner

Hanshin Expressway Co. Ltd.

Contractor

Kajima/Tobishima JV

2010

Tokyo, Japan

Central Circular Route Shinagawa Line Oi Zone
Tunnel Construction

Machine outer dia. 12.47 m
Excavation length 4,012 m
Features

The EPB TBM with the largest diameter in the world (at the time). A full suite of shieldtunneling backup equipment was delivered together with this unit.

Mechanical bit exchanging device

Project ownerTokyo Metropolitan Government
Bureau of Construction

Contractor

Obayashi/Seibu/
Keikyu Construction JV

United States

State Route 99 Tunnel Construction

Machine outer dia. 13.6 m
Excavation length 550 m/345 m
Features2013

URUP method

Project owner

Washington State Departmentof Transportation

Contractor

Seattle Tunnel Partners

BACKUP FACILITIES

Machine outer dia. 17.45 m

SECONDLY GROUT EQUIPMENTBELT CONVEYOR

Excavation length 2,856 m
Features
In order to counter earth and waterpressure on the face, excavated soil isstored inside the cutter chamber, thereby
controlling the internal chamber earthpressure and stabilizing the face.
When there is not much binder material
within the excavated soil itself andwaterproofing and flowability are poor, an
additive is injected through the face.
The excavated soil is kneaded to improveextraction.

9

Features
The shield configuration can be adapted for highly
water-permeable hardrock, shallow earth covering, boulders,and a wide range of other soil conditions and difficulties.
A ribbon screw conveyor transports coarse gravel and othertypes of ground soil. This improves sediment extraction
efficiency, which also facilitates faster tunneling.

Achievements
We have a great deal of experience from 2 m-classsmall-diameter to large-diameter tunnel excavation.
Examples of large-diameter machines we have delivered
include a φ13.6 m unit for the Tokyo Central Circular Route,a φ9.21 m unit for the Hong Kong Express Rail Link, and an
φ8.25 m unit for subway tunnel construction.

System Flow

Bundled delivery with backup equipment,
double arm erector (vacuum type), cutter bit
and disk roller cutter exchanging device

BACK FILLING B

BACK FILLING A

DUCTADDITIVE EQUIPMENT

Mud preparation plant

W.L.
Earth
and waterpressure: P

Plastic pressure: P

Soil hopper

HIGH VOLTAGE
TRANSFORMER(480V)

DEWATERING SYSTEM

Earth pressure gauge
Mud additive

INVERTER PANELMIDDLE FLOORHOSE REELOPERATION ROOMLUNCH ROOMHIGH VOLTAGE
TRANSFORMER(690V)
EMERGENCY GENERATORFOAM EQUIPMENT

P

G.L.

UPPER FLOOR

FIRE SUPPRESSIONSYSTEM

MEDICAL ROOMREFILL EQUIPMENT

WORK SHOP

LOWER FLOOR

10

Technology, Products, and Achievements

Various TBM

Hardrock and Boulder TBM

Open TBM

These TBM can pulverize rock at the face to excavate boulder-filled soil and hardrock. Three types ofcutterhead shapes—flat, semi-domed, and domed—are available to accommodate the specificground conditions. The mounted disk roller cutters can be switched between an ultra-hard chip
insert type and a ring exchangeable type to provide optimal performance in any situation. The largest
machine we have manufactured has a diameter of 10.82 m.

1988

The main components in these machines include a cutterhead, cutter drive unit, main beam, gripper, androof support. This simple structure enables operators to work on the cutterhead in close proximity to theface. Open TBM provide high performance and economical operation under solid hardrock conditions. They
are excellent for linear excavation, as the boring direction is regulated by the main beam.

FranceChannel Tunnel T2
1989

FranceChannel Tunnel T3

2017

Fukuoka Prefecture, Japan2014

JR Agatsuma Line Relocation Line Yanba Tunnel Construction

Contractor

T.M.L.

Project owner

East Japan Railway Co.

Machine outer dia. 8.78 m

Contractor

Shimizu/Nishimatsu/Hazama JV

Excavation length 20,010 m/18,858 m

Machine outer dia. 6.82 m

Features

Excavation length 4,160 m

2004

Vacuum erector

Kyoto Prefecture, Japan

Singapore Power EW1 Construction Section

Fushimi Section Tunnel Construction

Project owner

Singapore Power Assets

Project owner

Hanshin Expressway Public Corp.

Project owner

Japan Water Agency

Contractor

Obayashi Corp.

Contractor

Obayashi/Sato Kogyo/Seibu Construction JVContractor

Taisei Corp.

Machine outer dia. 6.88 m

Machine outer dia. 10.82 m

Excavation length 3,018 m

Excavation length 1,704 m

Excavation length 10,795 m
Features

Planned water pressure of 2.0 MPa,
oil backup system

Features

Hardrock focused, equipped with segment
conveyance apparatus, simultaneous
excavation, no backup car

Gunma Prefecture, Japan

Eurotunnel

Koishiwara River Dam Water Conveyance Facilities
Construction

Machine outer dia. 2.97 m

11Singapore

2003

Project owner

FeaturesSlurry TBM with largest diameter12

Technology, Products, and Achievements

Various TBM
New Open TBM

Full Shield TBM

These TBM are suited to a wide range of ground conditions, just like a full shield TBM, while
also being particularly effective for high-speed excavation in solid ground conditions, just likean open TBM. The shield shell resists ground loosening and falling rocks while enabling
operators to work on the cutterhead in close proximity to the face.

A cylindrical shell structure accommodates a broad range of ground conditions,from hard rock to soft ground, including fracture zones.

2007

South Korea

Geoyo Karak Cable Tunnel
Project owner

Korea Electric Power Corp.

Contractor

Daewoo Engineering & Construction,
Dong-Ah Geological Engineering Co. Ltd.

Machine outer dia. 12.84 m
Excavation length 4,290 m

2004

Gifu Prefecture, Japan

Cutter driving motor

Lubrication
injection port(front body)

Lubrication
injection port
(rear body)

CementMain gripper injection port Pre-boring port

Tail seal

Tokai-Hokuriku Expressway Hida Tunnel Construction
Project owner

Japan Highway Public Corp.

Contractor

Taisei/Nishimatsu/Sato JV

Erector

Machine outer dia. 12.84 m

Belt conveyor

Excavation length 4,290 m

Pitching device

Front gripper

Direction
control jackThrust jack

Rolling jack

Shield jackPre-boring port

Φ12.84 m new open TBM structure

13

14

Technology, Products, and Achievements

Rectangular TBM
APORO Cutter

MMST (Multi-Micro Shield Tunneling) Method

This cutter allows users to select a circular or non-circular—such as rectangular—
excavation cross section. The cutter mechanism utilizes a sophisticated cutter positioning
system to ensure highly precise excavation cross sections. This cutter is highly effective for
excavating hard ground and ground that contains obstructions.

This method involves shield tunneling of multiple smaller cross sections within the outer shell of a large
cross-section tunnel, with the internal earth being excavated after the outer shell has been shaped. We have
manufactured vertically aligned slurry and EPB rectangular TBM for small cross sections used for excavation
within an outer shell.

2016

Tokyo, Japan

2002(No. 13 Mutual Line Operation) Shibuya–
Daikanyama Underground Construction(Public Works Construction No. 1 Section)
Project owner

Tokyu Railways Co., Ltd.

Contractor

Kajima/Nishimatsu/Tekken JV

Kanagawa Prefecture, Japan(High Load) KJ124(4)–KJ132(1)Tunnel Construction
Project owner

Metropolitan Expressway
Public Corp.

Contractor

Taisei/Kajima/Toda JV

Machine outer dia. 7.44 m × 10.64 m

Machine outer dia. 7.68 m × 3.05 m

Excavation length 577 m

Excavation length 1,080 m

Other Types

OHM Method
By changing the direction and speed of rotation of the revolving shaft and the axis with which
it is eccentrically fixed, a single rotating cutter can excavate a variety of cross sections,
including rectangular, recessed-sided, expanded, and elliptical. The inner space within asquare cross section can be effectively utilized to also achieve a shallower cutting depth.

Motor
Idler

Pinion gear

Rear drive
gear

CutterInner gear
(Fixed)Planetaly gear
Front drive gear

2002

Kyoto Prefecture, Japan

Kyoto City Subway Tozai Line Ishida Station
Accessway Part 2 Construction

2016

2014

Tokyo, Japan

Kyoto Municipal Transportation
BureauUnderground Accessway Improvement and TEPCO Conduit Relocation for Public Facilities
Improvement Work Accompanying Class One Urban Redevelopment of Ginza Roku-chome District 10

Tokyo Metro Yurakucho Line
Kotake-mukaihara Station–Senkawa Station

Contractor

Tobishima/Nishimatsu/Morimoto/
Kohsei/Kcon JV

Project owner

Ginza Roku-chome District 10 Urban Redevelopment Association

Project ownerTokyo Metro Co., Ltd.

Contractor

Kajima Corp.

Contractor

Kumagai Gumi Co., Ltd.

Machine outer dia. 4.28 m × 3.83 m

Machine outer dia. 8.99 m

Machine outer dia. 5.7 m × 6.8 m

Excavation length 142 m

Excavation length 383 m

Excavation length 175 m/145 m

Features

Rectangular (OHM)
Features

15

Tokyo, Japan

Project owner

Equipped with two cutterhead units for oblong rectangular cross-section
excavation and two retractable cutter units for excavating rectangular cornersections. A hood is attached to control electrical interference with theretractable cutters. Minimal earth covering of 2.6 m.

Features

Composite circular(circular cutter + retractable spokes)

16Technology, Products, and Achievements

Special TBM
H&V Method

T-BOSS (T-type basement Branch Off Shield System) Method

The machine excavates two independent tunnels in close proximity running parallel to one another. It canalso create divergent branches and have the cutterheads rotate (spiral) around one another as they move
forward. Of the eight projects that have used this method in Japan in the past, we have provided themachines for seven.

A cutting ring comprised of cutting bits housed in the shield is rotated via the rotational torque of the cutterhead,directly cutting and penetrating the existing tunnel and mechanically joining a new tunnel to it in a T-shaped
junction. When joining the tunnels, the cutting ring serves to prevent soil and water infiltration, thus reducing theneed for ground reinforcement and improving the safety and efficiency of the joining process.

2015

Tokyo, Japan

Tachiai River Main Rainwater Conduit Construction
Project ownerTokyo Metropolitan Government Bureau of SewerageContractor

Shimizu Corp.

Machine outer dia. 3.29 m/2.89 m
Excavation length 736 m/929 m
FeaturesSpiral excavation

2022

Tokyo, Japan

Higashi-ojima Main Pipeline Construction
Project ownerTokyo Metropolitan Government Bureau of SewerageContractor

Kumagai Gumi Co., Ltd.
Machine outer dia. 4.19 m
Excavation length 1,880 m
Features

T-BOSS
Cutter bit

1998

1998

Subway No. 12 Roppongi and Aoyama Section Construction

Project ownerTokyo Metropolitan Government Bureau of Sewerage

Project ownerTokyo Metropolitan Subway Construction Co., Ltd.

Contractor

Nishimatsu/Takenaka Civil Engineering & Construction/JDC JV

Contractor

Hazama/Aoki/Aisawa/Tokura/Ito JV

P.14①（P.14②）

Machine outer dia. 7.06 m/13.18 m

Machine outer dia. 7.06 m/13.18 m

Excavation length 118 m

Excavation length 118 m

Features

Branch divergence during excavation

Over cutterTokyo, Japan

Minamidai Main Pipeline Construction

Features17

Tokyo, Japan

Special cutting bit

World’s first TBM equipped with a parallel articulating
mechanism; four cutters equipped on the same surface

Protective
concrete
Existing tunnel

Cuttingring

Fixing jig
Ring thrust jack

TBM Outline

When cutting existing pipework18

Technology, Products, and Achievements

Special TBM
DSR (Draw a Shield for Recycle system) Method

DPLEX (Developing Parallel Link Excavation) Shield Method

The TBM’s external casing and internal unit are constructed as independent units, and the internal(drive) unit is removed following completion of tunneling of the first section. It is taken to the launchshaft, where a new external casing is fitted, and excavation is then begun on the next construction
section. Because the TBM’s internal unit is reused, there is no need to construct an arrival shaft.
The launch shaft can be set up anywhere along the construction route.

Multiple parallel links supporting the cutterhead are used to drive the excavation process.
Various excavation cross sections can be created by changing to a non-circular shaped cutterhead.

In excavation

In retraction

Before removalof internal unit

During removalof internal unit

After removalof internal unit

1999

Osaka Prefecture, Japan

Kanaoka Rainwater Storage Piping Construction
2001

Tokyo, Japan

2002

Osaka Prefecture, Japan

Doi River Rainwater Drainage Pipe Installation (No. 2 Section)
Project owner

Sakai City Construction Bureau
Sewerage Department

Machine outer dia. 7.67 m

Contractor

Obayashi/Daiho/Sakai Engineering and Construction JV

Excavation length 1,150 m

Machine outer dia. 7.67 m

Project owner

Itami City

Bunkyo Ward Honkomagome 1/3-chome Area Reconstruction

Contractor

Shimizu/Kumagai/Maeda JV

Project ownerTokyo Metropolitan Government Bureau of SewerageContractor

Arai/Shiraishi JV

Machine outer dia. 2.68 m

Excavation length 1,150 m

Excavation length 686 m

Features

Parent–child and DPLEX methods

Parent–Child Shield Method

MF Shield Method

Inside the machine is a child unit that can be detached underground, thereby facilitating
continuous construction of tunnels of varying diameters within a single shield. A variety ofmethods can be used for cutter separation, depending on such factors as cutterhead
configuration, size, and difference in diameter between the parent and child units.

Multiple circular shield cutterheads are staggered in front and back one another, and theoverlapping shields are used to construct various tunnel cross sections. Because this method
allows excavating tunnels with large cross sections, both vertically and horizontally, it can be
tailored for excavation in sites where there are limitations or are already many other
underground structures. It can also efficiently build tunnel cross sections for the given projectrequirements or intended site usage.

Detachment procedure of
retractable cutter type machine

Excavation by parent unit

2005

Tokyo, Japan

Route 13 Minami-ikebukuro A Line
Construction Section

19

Detachment of child unit

2000

Tokyo, Japan

Project ownerTokyo Metro Co., Ltd.

Teito Rapid Transit Authority Line 11
Kiyosumi Section Public Works Construction

Contractor

Obayashi/Toa/DNC JV

Project owner

Teito Rapid Transit Authority

Machine outer dia. 8.17 m/6.78 m

Contractor

Kumagai/Maeda/Mitsui JV

Excavation length 132 m/1,454 m

Machine outer dia. 7.44 m/16.44 m

Launch of child unit

Excavation length 373 m

20

Technology, Products, and Achievements

Special TBM
MSD (Mechanical Shield Docking) Method

Vertical TBM

A receiving TBM and penetrating TBM excavate towards one another and dock underground, joining to create a single
tunnel. The two units are joined by a steel cylinder within the penetrating TBM, which is pushed into the penetrationchamber of the receiving TBM. The junction part resists the surrounding earth and water pressure and prevents soil
and water from entering. After the junction is created, the steel cylinder is utilized as a structural body strengthening
the tunnel and preventing water inflow for completion of the tunnel’s secondary lining.

This slurry shield TBM is used to excavate verticalshafts, including deep hardrock shafts. In addition
to various seals capable of withstanding highwater pressure, a two-part soil removal system
for reducing water pressure during boring is used
to ensure the stability of excavation.

In excavation
Penetration chamber

In jointing
Rectractable cutter

Rubber ring Steel cylinder Skin plate

Receiving side

Penetrating side

Segment Thrust jack

Receiving side

2006
Penetrating side

Thrust jack Segment
Steel cylinder inserted

Retractable cutter

Joint details

See “Joint details” below

Retractable jackRubber ring

Steel cylinder

Grouting pipe

Okayama Prefecture, Japan

Kurashiki Base Propane Storage Tank I Construction(Water Supply and Ventilation Shaft)
Project owner

Japan Oil, Gas and Metals National
Corp.

Contractor

Shimizu/Hazama/Okumura JV

Machine outer dia. 4.76 m
Excavation length 146 m

Seal

2010

Steel plate

Seal

Extrusion rod

Tokyo, Japan

Water Pipe (1,500 mm) Tunnel Construction from No. 2781 to No. 1241
in Aihara-machi, Machida City
Project ownerTokyo Metropolitan Government Bureau of Waterworks

Contractor

Shimizu/Fudo Tetra JV

Machine outer dia. 2.59 m
Excavation length 1,538 m
Features

MSD extrusion face (articulated)

Incline Shaft TBM
This TBM is used for steep-gradient tunneling, where the upward gradient of the tunnel
exceeds 30%. In order to excavate steep tunnels, a large gripper and slip-prevention steel
parts or invert blocks are used with a shield jack to keep the machine from slipping as it
digs. Of four projects carried out in Japan, our machines have been used for the pilot tunnel
in three of them.

Automated Underwater Excavators
These machines are equipped with excavation patterns for automatically boring the grounddirectly beneath the cutting edge in order to ensure smooth installation of caissons under awide variety of ground conditions.

2002

Miyazaki Prefecture, Japan

Omarugawa Power Station Hydraulic Piping
Inclined Tunnel Construction

2021

Osaka Prefecture, Japan

Project owner

Kyushu Electric Power Co., Inc.

Neyagawa North Underground Channel
Johoku Vertical Shaft Construction

Contractor

Okumura/Sato/Daiho/Asanuma JV

Project owner

Osaka Prefecture

Machine outer dia. 12.47 m

Contractor

Toda/Hanshin/Daiyo JV

Excavation length 4,012 m

Caisson inner dia. 28 m
Caisson depth

21

102 m

22

Technology, Products, and Achievements

Cutter Exchange
Slide Rotary-Type Disk Roller Cutter Exchanging Device

Double Casing Slide Gate-Type Cutter Bit Exchanging Device

This device allows disk roller cutters to be exchanged safely from inside the TBM (cutter frame) and undernormal atmospheric pressure, thereby ensuring operators do not have to work in dangerous spaces, such asnear the face or inside the cutter chamber, when excavating hardrock.

• Cutter bits can be safely replaced under normal atmosphericpressure.

Excavation direction• When the gate is opening or closing, the inner casing retracts so thatthe gate and seal do not come into contact, thereby ensuring smoothgate operation and reduced risk of seal damage.
• A gate seal presses against the gate after gate closure to ensure
there is no water inflow.

CasingBit seal
Cutter bit• Has a compact structure, which enables greater interlinkage formore cutter bits to be installed closely together.

Rear part of bit
Jack

Fixing flange
Inner casing• After cutter bits are taken out, filler material (e.g., grease) is injected
into the empty space to keep out rock mass debris or inflow.

Gate seal
Gate• All main components, including the gate, can be replaced, thereby
ensuring excellent maintainability.

Gate driving screw• The inner casing can be taken out for replacement when the gateseal is damaged.

Arc Gate-Type Bit Exchanging Device
Cutter face during excavation• Cutter bits can be safely replaced under normal atmosphericpressure.
• When the arc gate is closed, it is designed to be pulled backward sothat external pressure ensures it remains tightly closed against water,even when subjected to strong water pressure.
• When opening or closing, the gate seal is separated from the seal
surface, thereby facilitating smooth operation and a reduced risk ofdamage to the seal.
• Has a compact structure well suited to devices for replacing large
excavation tools, such as disk cutters.
• After cutter bits are taken out, filler material (e.g., grease) is injected
into the empty space to keep out rock mass debris or inflow.
• Can be equipped with a variety of excavation tools, such as replacing adisk cutter with toothed cutter bits.
• Has a removable gate, thereby allowing for exchanging in the eventthat the seal is damaged.

Cutter frame interior during cutter exchange

Features
1. Can be equipped anywhereon the cutter frame cross section• A twin-ring-type disk roller cutter minimizes the total
amount of equipment.
• The number of cutter frames is reduced to ensure
effective soil intake opening.

2. Capable of withstanding high water pressure• Cutter exchange has been successfully demonstrated
at earth and slurry pressures of 2.0 MPa.

3. Can be converted to cutters that can
excavate soft ground

4. Equipped with a soil consolidation
prevention system and disk roller cutter
abrasion detection system

Mechanical Bit Exchanging Device for Large-Diameter TBM
An access hole installed in the central or leg section of the cutterhead allows operators toenter the cutter spoke and, with the use of a simple jig, exchange worn cutter bits. Cutter
bits can be exchanged not only when they are worn but also to accommodate the conditionsof the face. Since 2002, we have delivered nine machines equipped with this device.

• A soil inflow prevention plate and additive discharge
prevent consolidation within the cutter holder.
• A magnetic abrasion detector prevents uneven wear,
and a physical abrasion detector measures theamount of abrasion.

5. Easy maintenance• The device (including the ball gate holder unit) can be
replaced under existing water pressure.

• Applicable to complex ground conditions (hardrock,earth and sand mixtures).

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24

Technology, Products, and Achievements

High-Speed Excavation

Hardrock and Boulders

Simultaneous Excavation(Long Stroke)

Simultaneous Excavation(Double Jacks)

The shield jack stroke and tail interior space can beextended to enable tunneling at the same time as segment
assembly. Incorporating a semi-automated erector, which
automatically transports segments to the segment assembly
site, allows greater operational efficiency and safety.

An advance jack and erection jack are installed in theinternal unit to enable tunneling at the same time assegment assembly.

2009

2003

Tokyo, Japan

Boulders can be crushed by this device inside the front of the TBM. It helps to reduce
operational downtime caused by blockages in the slurry discharge pipe. It also improves
intake, which reduces abrasion to the front of the cutterhead.

Tokyo, Japan

Central Circular Route Shinagawa Line Shield Tunnel (North) Construction

East-West Gas Pipeline Construction

Project owner

Metropolitan Expressway Co. Ltd.

Project ownerTokyo Electric Power Co.

Contractor

Kajima/Kumagai/Penta-Ocean JVContractor

Kajima/Nishimatsu/Obayashi JV

Machine outer dia. 12.5 5m

Machine outer dia. 3.62 m

Excavation length 8,030 m

Excavation length 9,030 m

FeaturesFeatures

Mechanical bit exchanging device, vacuum erector

Front Crusher

Reduced Work Site Operations

Max. monthly distance 1,168 m Avg. monthly distance 665 m

Automatic Segment Assembly System
This system automates the entire segment assembly process, including
segment delivery, supply, gripping, positioning, and fastening. A variety
of segment coupling methods can be accommodated (short bolts, longbolts, cotters, etc.), thereby facilitating better assembly quality andsafety and, particularly in the case of large diameters, speed.

Short bolt system

Automated backup equipment

Cotter driving

Sensing apparatus positioning

Deck-Mounted Power Unit

Bundled Delivery of Backup Systems

By putting the power unit, which is usually mounted on the
backup car, onto an operation deck within the TBM, lesstemporary launch hoses and cables are needed, thereby
speeding up initial set-up operations.

All of the slurry transport equipment and slurry treatment
equipment needed for operation of a slurry TBM can bedelivered together with the machine.

Cutter drive
inverter panel

Operation room

Segment automatic
assembly device

Cutter driving
motor

Segment shaperetention device

Backfillgrouting device

Power unit
Power unit

Cutterhead

Hydrauliccylinderfor lifting

No.1 backup car
Segment transporting hoist
Segment stock conveyor

Segment feeder
Shield jack
Articulation jackHydrauliccylinderfor sliding
Electric motor
for turning
Hydraulic cylinder
for pitching
Cotter fixing device
Shield jack25

CotterfeederHydrauliccylinderfor rotating

Hydrauliccylinderfor rolling
Cotter feeder
Sensing device
Gripping device

Hydraulic cylinder
for yawing

26

Units
Delivered

UGITEC TBM are recognizedthroughout Japan and around the world
For more than half a century, we have been manufacturing TBM tailored to the needs and conditions ofdifferent countries and regions. Today, UGITEC machines are used all over the world.

Φ9.22 m EPB TBM (Hong Kong)Φ7.8 m Slurry TBM (South Korea)

Φ6.24 m EPB TBM (Taiwan)
East Asia
China
Hong Kong
TaiwanΦ8.11 m EPB TBM (United Kingdom)

South Korea

EuropeUnited Kingdom
FranceDenmarkΦ17.45 m EPB TBM (United States)Φ6.9 m Slurry TBM (Singapore)
Southeast Asia
Φ5.22 m EPB TBM (United Arab Emirates)
Middle East
United Arab Emirates
Turkey27

Φ6.44 m Slurry TBM (India)
South Asia
India

North America
United States

Philippines
Singapore
ThailandIndonesia
Malaysia28

Network

Trade Name

Underground Infrastructure Technologies Corporation
Abbreviation: UGITEC

Offices and Plants

Head

3F Dojima Plaza Building, 1-5-30 Dojima, Kita-ku, Osaka 530-0003, Japan

OfficeTel: +81-6-7222-0837 Fax: +81-6-7222-8420
4 min. walk from Kitashinchi Station on JR Tozai Line

Established

October 1, 2021

Head Office

3F, Dojima Plaza Building, 1-5-30 Dojima, Kita-ku, Osaka 530-0003, Japan

Access4 min. walk from Nishi-Umeda Station on Osaka Metro Yotsubashi Line
5 min. walk from Watanabebashi Station on Keihan Nakanoshima Line
10 min. walk from JR Osaka Station

Tel: +81-6-7222-0837 Fax: +81-6-7222-8420
CapitalBusiness

480 million yen

Tokyo

8F Shibaura Renasite Tower, 3-9-1 Shibaura, Minato-ku, Tokyo 108-0023, Japan

OfficeTel: +81-3-6777-7101 Fax: +81-3-3457-7026
AccessTunnel excavation business (tunnel boring machines); civil engineering machinery-related design,

4 min. walk from JR Tamachi Station
7 min. walk from Toei Subway Mita Station

development, repair, and sales; other related business
Partner Sakai Works, Hitachi Zosen Corporation
Plants1-5-1 Chikko-shinmachi, Nishi-ku, Sakai, Osaka 592-8331, Japan
Ariake Works, Hitachi Zosen Corporation
1 Ariake, Nagasu-machi, Tamana-gun, Kumamoto 869-0113, Japan
Harima Works, Kawasaki Heavy Industries, Ltd.
8 Niijma, Harima-cho, Kako-gun, Hyogo 675-0180, Japan29

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