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http://dx.doi.org/10.12814/jkgss.2019.18.1.055

A Study on the Open Cut Restoration of Underground Cavity Using Concrete Mat  

Park, Jeong-Jun (Incheon Disaster Prevention Research Center, Incheon National University)
Shin, Heesoo (Institute of Technology Research and Development, UCI Tech co. Ltd.)
Chung, Yoonseok (Korea Conformity Laboratories)
You, Seung-Kyong (Dept. of Civil Engineering, Myongji College)
Hong, Gigwon (Institute of Technology Research and Development, Korea Engineering & Construction)
Publication Information
Journal of the Korean Geosynthetics Society / v.18, no.1, 2019 , pp. 55-65 More about this Journal
Abstract
This paper describes results of experimental and numerical analyses, in order to analyze a reinforcement effect of concrete mat on open cut restoration of underground cavity. The plate loading tests were conducted to evaluate a reinforcement effect of concrete mat, at reinforcement depths from the ground surface of 10 cm, 20 cm, and 30 cm. The result showed that the reduction ratio of stress (earth pressure) was about 60% at all reinforcement depth. The reinforcement effect considering ground surface settlement and reduction ratio of stress based on laboratory tests and numerical analysis was significant, at reinforcement depths from the ground surface of 10 cm~20 cm. LFWD test results showed that subgrade modulus was the largest when concrete mat was installed 20 cm below ground surface. Therefore, it is effective to reinforce concrete mat within 20 cm from the surface, when the underground cavity due to damage of underground utilities was formed in the height direction to the bottom of the pavement layer.
Keywords
Concrete mat; Underground cavity; Open cut restoration; Ground subsidence; Plate load tests; LFWD test;
Citations & Related Records
Times Cited By KSCI : 11  (Citation Analysis)
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