Earthquake
Seismic Strengthening / Liquefaction Mitigation
Japan is well known as a country with frequent earthquake. Forecasts even indicate the very high likelihood of an earthquake with a seismic intensity of lower 6 could strike at any time within the next 30 years in various regions.
As a civil engineering company of such country, we achieve total cost savings for our clients through our proprietary technologies that allow aseismic reinforcement and liquefaction mitigation works to be executed even from limited spaces on the ground, leaving existing buildings unaffected.
Restoring the 100-year history of the Tokyo Station
Earth retaining and foundation works to preserve and restore the Marunouchi station building of the Tokyo Station
The Marunouchi station building of the Tokyo Station is a historic building and designated as among the nation’s important cultural properties. While preserving the external appearance, the original third floor was restored and the largest seismic base isolation work to date in Japan was implemented. We built the earth retaining walls around the Marunouchi station building and replaced the pine piles that had supported the building with permanent piles.
Aseismic reinforcement of historical buildings
Related technologies
Constructing while leaving living space unaffected
Aseismic reinforcement of personal residences
Damaged residence by liquefaction
Our grid-form ground improvement technology makes it possible to apply integrated liquefaction countermeasures to residential lots and nearby public facilities including roads.
Even we use the smallest rig, we can create over 2,0m diameter of the columns of the jet grouting.
Related technologies
Examples presented
Earth retaining and foundation works to preserve and restore the Marunouchi station building of the Tokyo Station
| Area | Tokyo |
|---|---|
| Objective | Aseismic Reinforcement and Liquefaction Mitigation Renovation |
| Techniques | Diaphragm Wall/Cast-Place-in Pile |
| Period | 08/2010～06/2011 |
| Comment | (8/2007～6/2010) |
