MEASUREMENT AND EVALUATION OF CRACKS ON ROAD PAVEMENTS FOR DAILY INSPECTIONS BY LOCAL GOVERNMENTS

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04640
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 22010:Civil engineering material, execution and construction management-related
• Research Institution: University of Yamanashi
• Principal Investigator: YOSHIDA Junji 山梨大学, 大学院総合研究部, 准教授 (90345695)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 道路路面 / 維持管理 / 画像計測 / 深層学習 / 健全度評価

Outline of Final Research Achievements

This study develops a system for measuring and evaluating cracks on road pavements, in order to support their daily inspections in local governments. The system consists of three units. The first one is a measurement unit for recording images of road pavements, together with information of GPS. Character-istic points of the unit are that its cost is relatively low and it can easily be installed/detached to standard cars. The second one is an analysis unit of the recorded road images and it divides a road image into blocks, and computes its crack ratio by evaluating cracks inside those blocks using two neural networks. The third one is a visualization unit of the evaluated results. The unit shows crack ratio of each road im-age by a color point on the map, whose location is identified from GPS data and, when cricking a color point on the map, it can also show an evaluated road image, which is an origin of the color point.

Free Research Field

社会基盤の維持管理，画像解析，計算力学

Academic Significance and Societal Importance of the Research Achievements

本研究成果の意義は，地方自治体での道路の維持管理業務の実用化を念頭においた計測ユニットの開発と，その計測結果に対応した健全度評価システムにある．これらの計測ユニットおよび健全度評価システムに学術的な新規性は少ないものの，地方自治体の実務での運用を想定し，低価格で使い易く，かつ明解なアウトプットを提示可能なものを開発することができた．このことから，本研究成果は社会的に大きな意義を有しているものと考えている．