|
| | Abstract | | The 2011 off the Pacific coast of Tohoku Earthquake did serious damage to people's lives not only by the direct damage of an earthquake but also by the tsunami, subsidence, and liquefaction. We are conducting various geological risk assessments about this earthquake. A liquefaction risk is an element of the geological risks, and we are carrying out a geophysical research using an in-vehicle GPR system as part of liquefaction risk investigation in Itako, Ibaraki which suffered liquefaction damage. With the in-vehicle GPR system, we try to image under paved roads three-dimensionally at high speed. As a result, we find the system has a capability to carry out surveys along the survey line length of 60,701 m in three days. And we interpreted 15 anomalies which can be small-scale subsurface cavities under the survey lines. |
|
|
|
| |
|