Characteristics of
Civil Engineering Business
Pneumatic caisson
technology
The pneumatic caisson method is used for installing a variety of underground structures, including bridge foundations. We have installed more than 2,000 structures so far and developed unique technology such as technology realizing fully automated high-pressure work (New Dream) construction method.
Shield Tunneling and Pipe Jacking Technology
this boring technique uses tube-shaped tunnel excavator to prevent the surrounding soils from collapsing and excavate safely.
among them, shield tunneling method is a excavation method while excavating tunnel. blocks, which will be the outer walls of the tunnel, are assembled inside the machine to form walls.
Pipe jacking method is a tunneling method which thrust forward Tunneling Machine with Jacking Pipes from drive shaft.
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Mud pressurization (DK) shield methodThe representative shield construction method aimed at stabilizing the cut face with mud -
Double-O-Tube (DOT) Shield MethodEPB method can build multiple circular tunnels. -
DPLEX shield methodEPB method for building tunnels with arbitrary cut faces. -
J-DPLEX shield methodDPLEX shield method that uses hydraulic jack to rotate the cutter. -
Mud pressurizing propulsion methodRepresentative method of pipe jacking method that stablize the face with mud. -
DAPPI construction methodThis method allows cutterhead to be detached from drive shaft to remove obsticles, then restart excavating.
and it can be used for shield tunneling method as well as Pipe Jacking method.
Port and harbor technology
This construction method allows for the fast and economical manufacture of breakwater structures to keep the inside of the port and harbor safe from waves, protecting continental areas from damage resulting from tsunamis and tidal waves, and preventing corrosion of the seashore.
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Dolphin dock construction methodThe construction method for manufacturing caissons on the dolphin-type working ship -
Semicylindrical slit caissonThe construction method for reducing the wave power transferred to the breakwater by using a semicylindrical slit. -
In situ mixing (ISM) methodThe construction method for constructing structures and foundation grounds by mixing gravel generated on-site
Urban rejuvenation technology
This technology realizes economical and safe maintenance, repair, and renewal work of existing structures that are expected to deteriorate rapidly.
Green technology
We are engaged in the development of superior technology that reduces the environmental burden, such as creation of recycle-based society and regional environment conservation.
