RESEARCH CONCERNING METHOD FOR RISK JUDGEMENT OF BLOCK WALL BASED ON HEIGHT AND INCLINATION

Abstract

 In Japan, natural disasters such as typhoons, earthquakes, and tsunamis arise frequently, and the danger of block walls collapsing when a disaster occurs has been noted. Therefore, there is an urgent need to understand the current status of block walls and inspect them. Against this background, researchers of Tokushima University has been conducting field surveys based on the Ministry of Land, Infrastructure, Transport and Tourism's inspection index with the cooperation of the prefectural government and municipalities. However, block walls are scattered all across the country, and the current inspection method, which dispatches workers directly to the site, cannot cover a wide area. Therefore, we developed a method for extracting block walls from the point cloud data measured over a wide area and have been working on labor-saving of the field survey. In this research, we propose a new method for the risk judgement of block wall based on height and inclination, using the point cloud data.