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A Fundamental Study on the Application of Water Souuble Pouch for Ground Reinforcement

지반보강용 수용성파우치(PVP)의 활용을 위한 기초적 연구

Dongho Jung1
,
Kiho Kim2
,
Joo-Hyun Kim3
,
Jung-Geun Han4*
정 동호1
,
김 기호2
,
김 주현3
,
한 중근4*
1Member, Candidate Ph.D, Department of Civil Engineering, Chung-ang Univ.
2Non Member, Candidate Ph.D, School of Chemical Engineering & Materials Science, Chung-ang Univ
3Non Member, Porfessor, School of Chemical Engineering & Materials Science. Chung-ang Univ.,
4Member, Professor, School of Civil and Environmental Engineering, Urban Design and Study, Chung-Ang Univ.
*교신저자. *Corresponding Author. 
30 June 2017. pp. 121-129
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Abstract

There have been a number of water and sewer pipe breakdown reports followed by ground subsidence. Also, the excavating works for construction due to overcrowding of city have been common. Particularly, in urban areas ground becomes unstable because of the lowered lifeline sinkage followed excavation and backfilling. In order to solve the problem, some reinforcement works for ground by rod tamping or grouting have been applied. However, it is hard to predict when the buried utilities in underground will be damaged. Also, there is a limit for the underground exploration and investigation methods. Therefore, in this study, the estimated about the water soluble polymer pouch including poor mixed admixture which is designed to eliminate the dangerous factors. The reinforcement strength of this method was confirmed by verifying three points: meltiness in a certain period, water solubility in the ground water level, and characteristics of the pouch, which can be stored in daily conditions. It is also proved that this method allows to keep the ground from getting weakened in the installation of water and sewer pipe along with back filling materials.

Keywords
Pouch
Filled material
Lifeline
PVP
Ground reinforcement

도시의 노후화에 따른 상하수도관의 파손사례가 점차 증가하면서 지반함몰의 발생도 크게 증가하고 있고 도시과밀화에 따른 건설과 굴착공사들이 빈번해지고 있다. 특히, 도심에서는 lifeline이 지하화 되면서 지중에서 굴착과 되메움에 따라 원지반의 안정상태가 불안정한 상태를 갖게 된다. 이를 해결하기 위한 방법으로 양호한 토사다짐이나 그라우팅에 의한 지반보강법이 적용되고 있지만 지하매설물의 파손에 따른 시기를 예측키 어렵고, 지반내 구조물의 탐사방법도 한계가 있어 지반함몰과 같은 위험요소를 해결하기는 어려움이 있다. 따라서, 본 연구에서는 사전에 위험요소를 제거하기 위한 방법의 일환으로 개발된 빈배합상태의 혼화재를 포함한 수용성폴리머파우치에 대해 지반보강 적용성을 평가하였다. 대기속에 보관가능한 파우치의특 성과 지하수위내부에서의 수용성 및 일정시간내 융해됨에 따른 보강강도의 발현을 확인할 수 있었다. 이를 통해 상하수도관 매설시 뒤채움재에 혼합매설하는 경우, 지반내 물의상태에 따라 지반의 연약화를 방지가능할 수 있게 되었다.

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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 : 16
  • No :2
  • Pages :121-129
  • Received Date : 2017-06-02
  • Revised Date : 2017-06-19
  • Accepted Date : 2017-06-21
  • DOI :https://doi.org/10.12814/jkgss.2017.16.2.121
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