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2021 Vol.31, Issue 3 Preview Page

Research Article

The Evaluation of Pullout Resistance and Installation Damage according to the Shape of Flexible Strip Reinforcement

신장형 띠형 보강재의 형상에 따른 인발저항 및 시공성능 평가 실험 연구

Jaehyeung Jeoung1*
,
Jaehong Kim2
정 재형1*
,
김 재홍2
1Research Fellow, Geotech Research Division, Korea Institute of Civil and Building Technology
2Director of the Headquarters, Daihan Cork Co., Ltd.
1한국건설기술연구원 지반연구본부 연구위원
2대한 콜크 연구소장
*Corresponding Author
30 September 2021. pp. 321-332
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Abstract

Though development of reinforced earth wall is on the rise recently, safety verification for various methods remains behind which has caused the problems including collapse after installation. This study aims to evaluate the field applicability of the shape of flexible strip reinforcement according to pullout resistance test and field damage test. The test specimens were 3 shape of reinforcement, the typical flexible band reinforcement, developed luged band reinforcement, and band type reinforcement made by cutting geogrid. It was found that reinforcement of type have strengths and weaknesses, respectively. The best type of flexible strip reinforcements can be selected, if the conditions are considered with the installation conditions of the reinforcing earth retaining wall and the particle size of the backfill materials.

Keywords
reinforced earth wall
pullout resistance
installation damage test
flexible strip reinforcement

최근 새로운 개념의 보강토 옹벽이 많이 개발되고 있으나, 개발된 보강재에서 발생되는 시공과정에서 문제나 붕괴와 같은 문제의 연구는 부족한 실정이다. 이에 본 연구에서는 신장형 띠형 보강재의 형상에 따른 현장 적용성을 인발저항시험과 내시공성시험으로 평가하고자 하였다. 시험체는 일반적인 신장형 띠형 보강재, 돌기가 부착된 개발된 신장형 띠형 보강재, 지오그리드를 절단하여 만든 띠형 보강재를 사용하여, 신장형 띠형 보강재 형상의 차이에 대한 기초적인 연구를 수행하고 각 보강재료의 장단점을 비교하였다. 연구 결과로서 보강재의 형상에 따른 장 ‧ 단점을 명확하게 가지고 있는 것으로 나타났으며, 보강토 옹벽의 설치 조건과 뒤채움재의 입도를 고려하여 선택한다면 최선의 보강재를 선택할 수 있을 것으로 나타났다.

키워드
보강토 옹벽
인발저항시험
내시공성 시험
신장형 띠형 보강재
References
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 31
  • No :3
  • Pages :321-332
  • Received Date : 2021-08-10
  • Revised Date : 2021-08-30
  • Accepted Date : 2021-09-01
  • DOI :https://doi.org/10.9720/kseg.2021.3.321
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