A PROPOSAL OF HOW TO MAKE ROAD SINKHOLE POTENTIAL MAPS DUE TO EARTHQUAKES

Abstract

 In large-scale earthquakes, not only damage that can be confirmed visually, but also many “invisible damages” occur. Typical “invisible damage” on roads is the frequent occurrence of cavities under the pavement, which are known to expand and become shallower over time after an earthquake. For this reason, it is necessary to grasp the situation immediately after an earthquake. Therefore, it is effective to prepare road sinkhole potential map that evaluates the risk of cavities caused by an earthquake in advance for each point on the road. Thus, in this paper, we proposed a procedure to create a road sinkhole potential map due to an earthquake. In the procedure, the ground conditions, the structural conditions, and the level of shakings are considered. In addition, some practical problems such as the difficulties, gathering the details of buried structures are pointed out.