Special TBM

H&V(Horizontal & Vertical) TBM

H&V means Horizontal variation & Vertical variation.
The feature of H&V TBM are; ①independently controlled circular TBMs that are connected each other with flexible joint. ②Each TBM can be disconnected in the ground as needed. ③Cross articulation system allows spiral advancing movement and as a result, the position of each TBM can change from a top and bottom line to right and left line.

H&V(Horizontal & Vertical) TBM
Year of delivery / Place of delivery1998 / Tokyo
Construction nameMinamidai Pipe Line
Owner nameTokyo Metropolitan Government Bureau of Sewerage
Contractor nameNishimatsu / Takenaka Civil Engineering / JDC JV
TBM outer diameter3.29m / 2.89m
Excavation distance736m / 929m
FeaturesDiverge during excavation
⌀5.85m/11.79m H&V(Horizontal & Vertical) TBM
Year of delivery / Place of delivery2015 / Tokyo
Construction nameTachiai River Drainage Channel
Owner nameTokyo Metropolitan Government Bureau of Sewerage
Contractor nameShimizu Corporation
TBM outer diameter5.85m / 11.79m
Excavation distance774m / 777m
FeaturesSpiral excavation

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

⌀4.19m T-BOSS method

It is one of the methods to connect the excavating tunnel to an existing tunnel. It has a built-in steel cylinder driven by cutter head driving power.
The steel cylinder has special cutter bits and bore through the existing tunnel wall, either steel segments or reinforced concrete segments. While advancing forward, the tunnel wall of TBM stays close to the exisiting tunnel.
The steel cylinder can resist ground pressure and water pressure, so that ground improvement work can be reduced and tunnel connection work can be done more safely and effectively.

assembly drawing of T-BOSS
Year of delivery / Place of delivery2022 / Tokyo
Construction nameHigashi Ojima Pipe Line
Owner nameTokyo Metropolitan Government Bureau of Sewerage
Contractor nameKumagai Gumi Co., Ltd.
TBM outer diameter4.19m
Excavation distance1880m
Features It makes unnecessary for site workers to work on the cutting face and thus improves safety and construction efficiency.

Inner Shell DSR TBM (Draw a Shield for Recycle system)

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 departure shaft, where a new external casing is fitted, and excavation is then begun on the next construction section. Because the TBM’s internal unit is resued, there is no need to construct an arrival shaft. The drive shaft can also be set up anywhere along the construction route.

⌀2.68m Inner Shell DSR TBM
Inner Shell DSR TBM
Year of delivery / Place of delivery2001 / Tokyo
Construction nameReconstruction work near Honkomagome 1, 3-chome, Bunkyo-ku
Owner nameTokyo Metropolitan Government Bureau of Sewerage
Contractor nameArai / Shiraishi JV
TBM outer diameter2.68m
Excavation distance686m

Mother and Child TBM

It has a built-in Child unit TBM that can be separated in the underground. As a result, the Mother unit TBM and Child unit TBM can excavate tunnels of different size. Various methods can be applied to the cutter head separation technology, depending on the conditions such as the type, size, and diameter difference of cutter head between the Mother unit and Child unit.

⌀8.17m/6.78m Mother and Child TBM
Mother and Child TBM1
Mother and Child TBM2
Year of delivery / Place of delivery2005 / Tokyo
Construction nameLine 13 South Ikebukuro Line A Construction
Owner nameTokyo Metro Co., Ltd.
Contractor nameObayashi / Toa / Dai Nippon JV
TBM outer diameter8.17m / 6.78m
Excavation distance 132m / 1,454m

Eccentric multi-axis TBM (DPLEX TBM)

It is a method of excavation by driving multiple parallel links that support the cutter head. By changing the cutter head to a shape other than a circle, various cross-section excavations are possible.

⌀7.67m Eccentric multi-axis TBM (DPLEX TBM)
Year of delivery / Place of delivery1999 / Hyogo
Construction nameKanaoka Stormwater Storage Pipe Line
Owner nameItami City
Contractor nameShimizu / Kumagai / Maeda JV
TBM outer diameter7.67m
Excavation distance 1,150m

⌀3.93m / 2.14m Eccentric multi-axis TBM (DPLEX TBM)
Year of delivery / Place of delivery2002 / Osaka
Construction nameDoigawa Stormwater Line Sewage Pipe Line (No. 2)
Owner nameSakai City Construction Bureau Sewerage Department
Contractor nameObayashi / Daiho / Sakai Doken JV
TBM outer diameter3.93m / 2.14m
Excavation distance1,777m
Features Mother and Child TBM, DPLEX TBM

Multi-Face TBM (MF TBM)

⌀7.44m/16.44m Multi-Face TBM (MF TBM)

The MF TBM has multiple cutter heads overlapping each other, and excavate several kinds of sections, wind or tall oblong cross sections. It can be used effectively in limited areas or spaces in underground structures. It can supply effective tunnel sections to meet construction conditions and tunnel purposes.

Year of delivery / Place of delivery2000 / Tokyo
Construction nameKiyosumi Construction Area on Subway Line 11
Owner nameTeito Rapid Transit Authority
Contractor nameKumagai / Maeda / Mitsui JV
TBM outer diameter7.44m / 16.44m
Excavation distance373m

MSD TBM (Mechanical Shield Docking TBM)

⌀2.59m MSD TBM (Mechanical Shield Docking TBM)

Two TBMs coming from opposite directions meet each other under the ground. One TBM has a steel cylinder pushing forward to the other machine. Another TBM has rubber ring jointing with the cylinder. The steel cylinder and rubber ring can shut off soil and ground water completely. After docking, the equipment and structure inside the two machines are removed, then tunnels are jointed.

Jointing method

drawing of Jointing method

Joint details

drawing of Joint details
Year of delivery / Place of delivery2010 / Tokyo
Construction nameWater pipe (1500 mm) between 2781 Aiharamachi and 706 Aiharamachi, Machida City
Owner nameTokyo Metropolitan Government Bureau of Waterworks
Contractor nameShimizu / Fudo Tetra Construction JV
TBM outer diameter2.59m
Excavation distance1,538m
Features It is an economical method that does not require an auxiliary construction method to strengthen the shaft or ground.

TBM for steep inclines

It is a TBM dedicated to steep slopes that excavates tunnels with a slope of more than 30% diagonally upward. In order to excavate steep slopes, a large gripper and anti-slip steel or invert block are supported by shield jacks to prevent the machine from slipping. 3 of 4 past constructions in Japan are manufactured by us.

⌀2.7m TBM for steep inclines
Year of delivery / Place of delivery2002 / Miyazaki Prefecture
Construction nameKomarugawa Power Plant Hydraulic Pipeline Inclined Shaft
Owner nameKyushu Electric Power Co., Inc.
Contractor nameOkumura / Sato / Daiho / Asanuma JV
TBM outer diameter2.7m
Excavation distance1,780m

Vertical TBM

⌀4.76m Vertical TBM

It is a TBM that vertically excavates the ground including rocks of deep underground. 
In addition to various seals that support high water pressure, the soil discharge system is divided into two line to reduce water pressure during excavation, achieving stable excavation.

Year of delivery / Place of delivery2006 / Okayama Prefecture
Construction nameKurashiki Base Propane Storage Tank I Construction (Water Supply / Ventilation Shaft)
Owner nameJapan Oil, Gas and Metals National Corporation (JOGMEC)
Contractor nameShimizu / Hazama / Okumura JV
TBM outer diameter4.76m
Excavation distance 146m

Automatic underwater excavation machine

The automatic underwater excavation machine has a built-in excavation pattern that automatically excavates the base plate directly on the cutting edge so that the caisson can be smoothly submerged in a wide range of ground conditions.

Year of delivery / Place of delivery2021 / Osaka
Construction nameNeyagawa Northern Underground River Jyohoku Shaft
Owner nameOsaka Prefecture
Contractor nameToda / Hanshin / Daiyo JV
Caisson inner diameter28m
Caisson depth102m

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