[Service] Earthquake Survey

Utilizing the property of increased elastic velocity! We will indirectly estimate the ground conditions from the layer thickness.

Our company conducts "refraction seismic exploration." This survey method involves observing refracted waves that have returned after being refracted at boundaries of strata with different underground velocities, using measuring devices installed on the surface to determine the underground velocity structure. Artificial elastic waves (P-waves or S-waves) are generated near the surface, for example, by blasting. 【Features】 ■ Utilizing the property of increased elastic velocity, we indirectly estimate ground conditions from the elastic wave velocity structure and the relationship between elastic wave velocity and layer thickness. ■ In bedrock, we use the P-wave velocity, which varies due to rock quality, hardness or softness of the bedrock, degree of weathering or alteration, and the state of fractures, as a parameter to infer the quality of the ground from differences in elastic wave velocity distribution. ■ In the field of earthquake engineering, the obtained elastic wave velocities and layer thicknesses are directly used for seismic design or seismic response analysis. *For more details, please refer to the PDF materials or feel free to contact us.

Site and ground investigationGeological Survey CompanyGeological Survey