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A Study on the Characteristics of Behavior of Block-type Reinforced Earth Retaining Wall Considering Failure Surface

파괴면을 고려한 블록식 보강토 옹벽의 거동 특성 연구

Won-Sub Yoon1
,
Jun-Kyu Park2
,
Young-Su Chae3*
윤 원섭1
,
박 준규2
,
채 영수3*
1Member, Ph.D, Dept. of Civil Engineering, The University of Suwon
2Nonmember, CEO, Seo Kang Geo
3Member, Professor, Dept. of Civil Engineering, The University of Suwon
*교신저자. *Corresponding Author. 
30 September 2016. pp. 13-26
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Abstract

In this study, more economical than conventional reinforced soil retaining walls, we compared the behavior characteristic about the safety block type numerically for reinforced retaining wall. In this study, reinforced soil retaining wall, first, was integrated a wall putting shear key on the blocks. Second, construction reinforcement focused on the theoretical failure surface was satisfied with the stability of a retaining wall reinforced by a shear plane. when analyzing, element of using reinforcement was carried out a numerical analysis for the cable element and the strip element, and they were analyzed under the conditions according to the stiffener length, distance, with or without shear key. Analysis for the integration of the front wall was reinforced soil retaining walls by installing a larger displacement shear key confinement effect, if reinforced construction and reinforcement with 1 interval and 2 interval, the failure surface was bigger displacement constraints. Generating a deformation amount was smaller than the generation amount of deformation accrued during construction of AASHTO so that it was stable.

Keywords
Block type wall
Numerical analysis
Joint

본 연구에서는 최근 보강토 옹벽의 보강재와 시공법에 대한 국산화에 대한 요구로 전면벽체나 토목섬유 등을 대체할 수 있는 공법에 대한 개발 수요가 많아짐에 따라 경제적이고, 안정한 블록식 보강토 옹벽의 개발을 실시하고, 새롭게 고안된 블록식 보강토 옹벽에 대해 수치해석을 실시하여 거동특성에 대해 분석하였다. 제안된 보강토 옹벽은 첫째, 블록에 전단키를 두어 벽체를 일체화 하였으며, 둘째, 이론적인 파괴면에 보강재를 집중적으로 시공하여 전단 파괴면을 보강함으로써 옹벽의 안정성을 만족시키는 공법이다. 블록식 옹벽의 거동 특성을 분석하기 위해 해석에서 보강재의 사용 요소는 cable 요소와 strip 요소에 대해 수치해석을 실시하였으며, 보강재 길이, 간격, 블록의 일체화의 조건을 변화하여 해석하였다. 이러한 조건으로 해석한 결과 파괴면만 보강하는 경우보다 전면 벽체 블록과 체결을 위해 긴 보강재를 설치하는 경우가 보강효과를 증가시키고, 변위를 많이 구속할 수 있는 것으로 판단되었으며, 전면 벽체와 체결과 함께 일체화를 고려하기 위해 전단키를 설치하는 경우가 벽체를 개별요소로 해석한 경우보다 변위 구속효과가 있었다. 또한, 긴 보강재를 1간격과 2간격으로 시공한 경우의 발생 변형량은 AASHTO의 시공중 허용 발생변형량에 비해 작게 발생되어 본 연구에서 제안한 공법은 구조물의 중요도에 따라 보강재의 간격을 달리하여 현장에 적용할 수 있는 안정한 공법으로 판단된다.

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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 : 15
  • No :3
  • Pages :13-26
  • Received Date : 2015-11-09
  • Revised Date : 2016-08-02
  • Accepted Date : 2016-08-02
  • DOI :https://doi.org/10.12814/jkgss.2016.15.3.013
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