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http://dx.doi.org/10.14481/jkges.2022.23.8.17

Safety Evaluation of the Settlement Amount of the Bridge Earthwork Transition Area Using the Ground Penetrating Radar in the Soft Ground Section  

Jung, Gukyoung (Dept. of Safety and Health Convergence Engineering, Soongsil University)
Jo, Youngkyun (Dept. of Safety and Health Convergence Engineering, Soongsil University)
Kim, Sungrae (Dept. of Safety and Health Convergence Engineering, Soongsil University)
Publication Information
Journal of the Korean GEO-environmental Society / v.23, no.8, 2022 , pp. 17-22 More about this Journal
Abstract
To reduce the bump of bridge/earthwork transition area caused by the settlement of the soft ground during public use, the road agencies have been continuously overlay or repavement at those areas. In this study, the vehicle-mounted ground penetrating radar with 1GHz air-coupled antenna was used to estimate the settlement amount of those areas for nine bridges built in the soft ground. Results shows that it is possible to effectively measure the thickness of pavement up to a depth of 1 m on an asphalt road with ground penetrating radar technology that can inspect under the road surface. Distinctively deformation of the road surface, the variation in the thickness of the pavement measured at bridge/earth transition areas is equivalent to a minimum of 50 mm and a maximum of 600 mm, and there is a risk of cavity in the ground. The difference in the increased pavement thickness is 50~250 mm for each bridge connection, which may cause the differential settlement. In this study, by using the result of the ground penetration radar, a plan for improving drivability and maintenance of the settlement is suggested and applied to the field.
Keywords
Soft land; Bridge/Earthwork Transition Area; Settlement; Ground Penetraing Radar;
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