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http://dx.doi.org/10.12814/jkgss.2019.18.3.079

Evaluation on Cavity Expansion under Pavement based on Groundwater Injection test  

Park, Jeong-Jun (Incheon Disaster Prevention Research Center, Incheon National University)
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.3, 2019 , pp. 79-88 More about this Journal
Abstract
This study described a results of groundwater injection test in cavity, in order to evaluate characteristics of cavity expansion under pavement. That is, groundwater amount proportional to the cavity volume was injected into the generated cavity step by step, and then the cavity with the changed size was monitored as the injected groundwater was drained. The test result showed that the cavity volume by groundwater injection increased, and then it converged or decreased. This means that some of the relaxation soil around the cavity collapsed, and the fine-grained soils in some soils filled the void in the surrounding soils when the cavity is expanded by groundwater injection. The volume change and expansion characteristics of the cavity according to the groundwater injection step were analyzed. The result showed that the cavity extended laterally. Therefore, it was found that the cavity expansion is caused by the repetition of the relaxation soil collapse due to the groundwater flow and the loss of the collapsed soil below the cavity.
Keywords
Cavity expansion; Groundwater injection test; GPR exploration; Volume change; Ground subsidence;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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