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Evaluation on Behavior Characteristics of a Pocketable Expansion Material for Ground Cavity Based on Wheel T racking Test Results

휠트래킹 시험을 통한 포켓형 지반공동 긴급복구 팽창재료의 거동특성 평가

Jeong-Jun Park1
,
Ju-Ho Kim2
,
Ki-Sung Kim3
,
Dongwook Kim4
,
Gigwon Hong*5
박 정준1
,
김 주호2
,
김 기성3
,
김 동욱4
,
홍 기권*5
1Principal Researcher, Incheon Disaster Prevention Research Center, Incheon National University
2General Manager, UCI Tech Co. Ltd.
3President, UCI Tech Co. Ltd.
4Associate Professor, Department of Civil and Environmental Engineering, Incheon National University
5Director, Institute of Technology Research and Development, Korea Engineering & Construction
*교신저자. *Corresponding Author. 
30 March 2018. pp. 75-83
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Abstract

This paper described a results of dynamic stability by using wheel tracking test and unconfined compression test, in order to evaluate behavior characteristics on the developed pocketable expansion material for emergency restoration of ground cavity. The wheel tracking test result showed that the settlement increment ratio of the recovered ground by the expansion material was decreased compared to the sandy ground in high load condition. That is, it was confirmed that the expansion material was able to restrain the settlement due to the material stiffness, and the same results were obtained for the dynamic stability evaluation results. From the results of unconfined compression test, the pocketable expansion material was found to be able to fully support load on the restored cavity.

Keywords
Ground cavity
Expansion material
Silicon pocket
Wheel tracking test
Dynamic stability

본 연구에서는 지반 내 공동에 대하여 긴급복구가 필요한 경우를 대상으로 개발된 포켓형 팽창재료의 거동특성을 분석하고자, 휠트래킹 시험을 통한 동적안정도 및 일축압축강도시험을 이용한 강도특성을 평가하였다. 휠트래킹 시험 결과, 높은 하중조건 에서 포켓형 팽창재료로 복구된 지반은 모래지반에 비하여 침하량 증가율이 감소하였다. 즉, 포켓형 팽창재료는 재료의 강성으 로 침하억제효과를 나타내는 것으로 확인되었으며, 이는 동적안정도 평가결과에서도 동일하게 나타났다. 휠트래킹 시험 전･후 의 일축압축강도시험 결과로부터 공동 긴급복구용 포켓형 팽창재료는 복구된 지반 상부의 하중지지역할이 충분히 가능한 것으로 평가되었다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 17
  • No :1
  • Pages :75-83
  • Received Date : 2018-02-22
  • Revised Date : 2018-03-04
  • Accepted Date : 2018-03-08
  • DOI :https://doi.org/10.12814/jkgss.2018.17.1.075
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