| BUILDING OF EVERLASTING FOUNDATIONS BASED
ON RESPECTIVE PURPOSE OF CONSTRUCTION |
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In Japan where many earthquakes occur,
foundation works play the vital role for
every construction work. It is expected demands
for foundation works will increase more and
more for the future, which should call for
highly improved drilling technology with
much accuracy.
Utilizing excellent technology cumulated
on oil field and geothermal wells, we are
handling drilling jobs in all corners of
foundation works, underground diaphragm walls,
vertical shafts, pilot holes, drainage galleries,
etc.
We hold the following civil engineering
works which set the records of Japan:
- Drilling of a 4.4m diameter hole through
hard stones
- Drilling of a 6.1m diameter hole through
soft soils in Yokohama
- Drilling of a water well of 1m diameter
x 176m deep
- Drilling of an 1.7m I.D.
x 113m deep
vertical shaft using Multi-Path
Method
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4.4m hole Bit (hard stones)
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6.1m hole Bit (soft soils)
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Multi-Path Method
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| 1. STEADY TECHNOLOGY INNOVATIONS AND UNIQUE
NEW TECHNOLOGY |
| Since the establishment of our company,
we have been striving for development of
drilling technology for foundation piles
in order to cope with large scale civil construction
works in Japan and abroad. As a result, we
could complete Honshu-Shikoku Long-Span Bridge
Project, National Crude Oil Stock Pilling
Project and Tokyo Bay Transverse Highway
Project. We will keep on our efforts to participate
in specialized project such as Large Diameter
Drillings, Over-Lapping Method and underground
Diaphragm Walls. |
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OVERLAP METHOD
It is, at first, to drill full cross section
for piles with high vertical accuracy at
certain intervals, then drill remaining lapped
sections using TDC own developed O.L bits
for formation of underground diaphragm walls
and gradings of seabed base rocks. This technology
is also useful for drillings at hard stone
steep slopes with high vertical accuracy. |
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LARGE DIAMETER BATTER PILING TECHNOLOGY
It is our company's patent to form high
precision battered piles by mean of non-weight
drill collar which utilizes floating force
by Reverse Circulation Drilling Technology.
We connect non-weight drill collar having
sealed in outer pipe right above the bit
for the sake of generating floating force
to prevent the angle loosening of the bore.
We have completed Kami Goto, Shiroshima
and many other berth foundation piling works
for National Crude Oil Sotckpilings by this
patented technology.
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| 2. CIVIL FOUNDATION WORKS & COMPLETED
JOBS |
Having been paid hot attentions to the
development projects ashore know as Water
Front, the vital technic for the development
is drilling practices in the sea. We have
splendid knowhows and results on seabed and
riverbed drillings for underwater coffering
works, seabed diaphragm walls, seabed buried
anchors and underwater foundation of bridges.
In Japan, Multi-Column Method Work for
Onaruto Bridge of Honshu-Shikoku Long-Span
Bridges, foundation work for Kami Goto National
Crude Oil Stockpiling, Water Intake Shaft
work of Hokkaido Shiriuchi Thermal Power
Station are the dominant works we have completed.
In overseas countries, we have completed
hard stone drilling works for an Offshore
Building and Ferry Terminal in Hong Kong
and many soft stone drilling foundation works
as for Pakse Bridge in Lao, Mekong Bridge
in Cambodia, New KB Bridge in Parao, Rupsa
Bridge in Bangladesh.
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PAKSE BRIDGE
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PAKSE BRIDGE FOUNDATION WORK, PAKSE LAO
Geography & Strength:
Sandy stone - 400 kg/cm2
Completed Jobs:
- Casing Drill Method
1.8m dia x 9m - 21m length x 40 piles
- Reverse Circulation Method
1.8m dia x 18.5m - 30m length x 40
piles
- Earth Drilling Method
1.5m dia x 26m - 44m length x 42
piles
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MEKONG BRIDGE
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MEKONG BRIDGE FOUNDATION PILING WORK,
KAMPONG CHAM, CAMBODIA
Geography & Strength:
Cohesive soil, sandy soil, gravel -
N-value >50
Completed Jobs:
- Reverse Circulation Method
2m dia x 22m - 40m length x 106 piles
- Earth Drilling Method
1m dia x 27m - 36m length x 82 piles
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NEW K-B BRIDGE
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NEW K-B BRIDGE FOUNDAITON PILING WORK, PARAO
Geography & Strength:
Coral reef, andesite - 500 kg/cm2
Completed Jobs:
- Casing Drill Method
- Removal of old piles & formation
of new piles
2m dia x 29m - 31m length x 34 piles
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CHRISTMAS IS., KIRIBATI
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BERTH FOUNDATION PILING WORK, CHRISTMAS IS.,
KIRIBATI
Geography & Strength:
Sand, limestone - 100-200 kg/cm2
Completed Jobs:
- Reverse Circulation Method
1m dia x 2.3m length x 24 piles
0.7m dia x 11.4m length x 52 piles
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RUPSA BRIDGE
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RUPSA BRIDGE FOUNDATION PILING WORK BANGLADESH
Geography & Strength:
Cohesive soil, sandy soil - N-value
<70
Completed Jobs:
- Reverse Circulation Method
2.5m dia x 63m length x 24 piles
2.5m dia x 74.8m length x 36 piles
- Earth drilling Method
0.9m dia x 40`50m length x 332 piles
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PILING WORK OF TLU INSTALLATION
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PILING WORK OF TLU INSTALLATION, SAKHARIN,
RUSSIA
Geography & Strength:
Silty rock, sand stone - 510-500 kg/cm2
Completed Jobs:
- Casing Drill Drilling Method
2.5m dia x 33.2m length x 4 piles
- Reverse Circulation Method
2.25m dia x 48.8m length
x 4 piles
SAKHARIN |
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NAMIKATA BERTH
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NAMIKATA BERTH PILING WORK, EHIME, JAPAN
Geography & Strength:
Sediment layer (with sand, clay, gravel)
Weathered granite, granite - 100-500
kg/cm2
Completed Jobs:
- Reverse Circulation Method
0.7m - 1m dia x 26.6m length x 44
piles
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