◆ Earthquake Hazard Mitigation Technology
Preparedness for large earthquakes, beginning with active fault research, and concluding with earthquake resistant design.
Simulation of strong motion
Earthquake ground motions are the result of propagating waves in the earth medium originating from a seismic source. The engineering synthesis and simulation methods have been developed for earthquake ground motions for seismic design of structures, by improving the Green's function method.
Liquefaction Analysis for the Port Facility
A large amount of damage is being sustained with the generation of liquefaction by earthquakes in subsidence and deformation of quays or runways. This figure is the analytical result for liquefaction, and the red zone is the liquefaction area. The prediction of the liquefaction with high accuracy will be conducted.
Detection System for Debris Flows by vibration sensor
In areas where volcanic activity has been present and volcanic sediment has accumulated, significant caution should be taken for the occurrence of debris flow disasters. Debris flows that have been automatically detected by the vibration sensor in the administration office, as well as earthquakes and noise, have contributed to the development of an automatic, real-time detection technique.
Seismic Refraction Analysis using the Tomographic method
The geo-tomographic method has been developed in seismic refraction analysis instead of the conventional one called "Hagiwara's method". This method is able to evaluate the subsurface velocity structure more precisely.
Active Fault Detection using Aerial Photographs
The quantitative detection method of active fault location and length using aerial photographs is developed in collaboration with the Independent Administrative Institutions Public Works Research Institute.
Gravity Survey
The subsidence of ground surface, caused by air-raid shelters or mine cavities, is a problem expected to be solved. The gravity survey method detects the change of density below the ground surface, and it is expected to detect the cavity effectively from the surface.
Two Dimension Resistivity Survey Analysis
The resistivity survey method visualizes the resistivity distribution of the ground. This method is effective for obtaining information about the geological structures in the hydro geological survey or the mountain tunnel survey.
