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2021 Vol.37, Issue 3 Preview Page

Research Article

Evaluation of Drainage Capacity of Precast Concrete-panel Retaining Wall Attached to In-situ Ground Using Numerical Analysis

수치해석을 이용한 원지반 부착식 판넬옹벽의 투수성 평가

Youg Kyu Kwon1
,
Jae Won Lee2*
,
Young-cheol Hwang3
,
Hoki Ban4
,
Minjae Lee5
권 용규1
,
이 재원2*
,
황 영철3
,
반 호기4
,
이 민재5
1Member, Ph.D. Student, Dept. of Civil Engrg., Chungnam National Univ.
2Member, Vice President, Sejong E&C.
3Member, Prof., Dept. of Civil Engrg., SangJi Univ.
4Member, Associate Prof., Dept. of Civil Engrg., Kangwon National Univ.
5Prof., Dept. of Civil Engrg., Chungnam National Univ.
1정회원, 충남대학교 토목공학과 박사과정
2정회원, 세종 E&C 부사장
3정회원, 상지대학교 스마트건설공학과 정교수
4정회원, 강원대학교 토목공학과 부교수
5비회원, 충남대학교 토목공학과 정교수
*Corresponding Author
31 March 2021. pp. 43-50
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Abstract

On the construction of new roads, the cut slope is inevitable and thus has been widely applied in the mountainous area. Particularly, the retaining wall with the precast concrete panel is often selected for its higher stability and mostly constructed in bottom-up method. However, the bottom-up method results in steeper slope as 1:0.05 before constructiong retaining wall and thus causes poor compaction at backfill which may induce instability during or after the construction. To overcome this problem, precast concrete panel retaining wall was attached in-situ ground (so called top-down). This paper presents the evaluation of drainage capacity of top-down method which has impermeable layer between panel and mortar being used to increase the ability of attachment of the precast concrete panel.

Keywords
Precast concrete panel
Drainage system
Permeability
Slope stability
FEM

우리나라는 산지가 많은 지형적인 특성으로 도로와 도시 개발에 따라 산지를 굴착하고 옹벽을 설치하는 공사가 매년 증가하고 있다. 특히 Panel식 옹벽은 안정성이 높기 때문에 사용빈도가 높으며, 일반적으로 Bottom-up방식을 사용하고 있다. 하지만 옹벽을 설치하기 위해 1:0.3정도의 기울기로 굴착 후 옹벽을 시공하는 방식인데 이러한 방식은 경사굴착으로 인해 추가 토공처리가 필요하며, 되메움과 다짐불량에 의한 안정성 저하 등의 문제점을 지니고 있다. Top-down방식의 경우 이러한 문제점을 보완할 수 있다. 하지만 Panel을 사면에 부착시키기 위해 사용되는 모르타르로 인해 옹벽과 사면 사이에 불투수층이 생긴다. 따라서 본 연구에서는 가상의 사면에 불투수층을 고려하여 배수시스템들의 역할이 우기시 사면의 안정성에 미치는 영향에 대하여 비교 분석하였다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 37
  • No :3
  • Pages :43-50
  • Received Date : 2021-03-15
  • Revised Date : 2021-03-22
  • Accepted Date : 2021-03-23
  • DOI :https://doi.org/10.7843/kgs.2021.37.3.43
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