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2017 Vol.16, Issue 2 Preview Page
Fundamental study on the development of Filling materials for Trenchless Emergency Restoration of Ground cavity

비개착식 지반공동 긴급복구를 위한 충전재료 개발에 관한 기초 연구

Nam-Jae YU1
,
Jung-Geun Han2*
,
Kang-Il Lee3
유 남재1
,
한 중근2*
,
이 강일3
1Member, Deputy General Manager, Korea Conformity Laboratories
2Member, Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ.
3Member, Professor, Dept. of Civil Engineering, Daejin University
*교신저자. *Corresponding Author. 
30 June 2017. pp. 97-107
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Abstract

Recently, there have been a lot of incidents related to ground sinks in urban areas, but restoration work is complicated and inconvenience due to on-site control, and particularly, grouting and soil filling are generally applied as recovery measures, but when the grouting or the soil filling is carried out, material segregation phenomenon occurs in the ground or a lot of restoration amount is often required, depending on the state of sinks and the existence of groundwater under the ground and the soil can be lost due to the flow of the ground water, and thus the purpose of this study is to develop a pouch-type filler applied to a trenchless method for emergency reinforcement of the ground sinks with the aim of quick recovery of the ground sink in urban areas, and as a result, it was confirmed that compression strength and the expansion ratio were different according to the temperature of ground water and the compression strength and the expansion ratio could be controlled by mixing alumina powder.

Keywords
Ground sink
Trenchless emergency restoration
Alumina powder
Hydrophilic polymer

최근 도심지에서 지반함몰이 많이 발생하고 있으며 복구작업시 현장 주변 통제로 매우 복잡하고 불편하고 복구대책 공법으로 그라우팅 및 흙메우기 공법이 적용되고 있지만 지반 내 지하수위의 존재 및 공동상태에 따라 재료분리 현상이 발생하거나 많은 양의 복구재료가 요구되는 경우가 많고 지하수의 흐름에 따라 지반 내에서 유실되는 경우도 발생하고 있어 본 연구는 도심지에서 지반함몰이 발생하고 신속하게 복구하는 것을 목표로 지반공동의 긴급보강을 위해 비개착식 공법에 적용할 파우 치형 충전재를 개발하는 것으로 지하수의 온도에 따라 충전재의 압축강도 및 팽창비가 다른 것과, 알루미나 파우더의 혼합을 통해 압축강도와 팽창률을 조절할 수 있음을 확인했다

References
1
Jung, J. D. (1998), “Concrete Material Engineering”, Bosungkag, pp. 54.
2
Korea Conformity Laboratories (2014), “Performance Evaluation of Grout for Off shore Wind Power structure”, Research Report.
3
Lim, J. G., Kim, Y. J., and Chun, B. S. (2011), “Application of Artificial Neural Networks for Prediction of the Flow and Strength of Controlled Low Strength Material” Korean Geo-technical Society Vol. 27, No. 1, pp. 18.
4
Park, D. H. (2009), “A Study on the Environmentally Friendly and Durable Characteristic of Inorganic Grouting Material”, Hanyang University Graduate School, Doctorate Thesis.
5
Ministry of Knowledge Economy (2010), “The Standardization Technology for the Environmental-Friendly Utilization of Pond-Ash”, Research Report.
6
Seo, D. W., Kim, H. Y., Kim, K. M., and Chun, B. S. (2010), “Engineering Characteristics of Plasticizer Light-weight Foamed Concrete according to Changes of Mixing Ratio”, Korea Geo-Environmental Society, Vol. 11, No. 4, pp. 33-42.
Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 16
  • No :2
  • Pages :97-107
  • Received Date : 2017-05-22
  • Revised Date : 2017-06-13
  • Accepted Date : 2017-06-18
  • DOI :https://doi.org/10.12814/jkgss.2017.16.2.097
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