Experimental Study on the Shear Strength Evaluation of a Three-dimensional Assembled Concrete Retaining Wall Blocks

Sehyun Park; Kyoungyoung Choi; Daesung Jung; Kyeongmo Kim; Hyunkoo Kang

doi:10.14481/jkges.2025.26.5.13

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2025 Vol.26, Issue 5 Preview Page

Experimental Study on the Shear Strength Evaluation of a Three-dimensional Assembled Concrete Retaining Wall Blocks 콘크리트 입체결합 옹벽블록의 전단강도 평가에 관한 실험적 연구

1 May 2025. pp. 13-25

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Abstract

In this paper, we propose a three-dimensional assembled wall block in which all blocks in the upper-lower, left-right, and front-back directions are joined together to resist shear across the entire cross-section of the block, rather than the existing method in which only the upper-lower blocks are supported by horizontal shear keys. The horizontal shear strength according to the arrangement form between the front and back blocks and the friction resistance strength between foundation concrete and blocks were experimentally evaluated, and shear strength estimation formulas for design were presented. By comparing the horizontal shear strength with that of the existing segmental block gravity wall using the shear key method, it was verified that the horizontal shear strength of the proposed three-dimensional assembled retaining wall blocks is very superior. It is thought that the shear strength estimation formula proposed through this study can be used as basic data for the design and stability review of segmental block gravity walls using three-dimensional assembled retaining wall blocks. In addition, it is expected that the three-dimensional assembled retaining wall block will provide a good solution for responding to complex disasters due to climate change by improving the structural stability of segmental block gravity walls.

Keywords

Segmental block gravity wall

Three-dimensional assembled retaining wall block

Reinforced earth wall

Horizontal shear test

Shear strength

본 논문에서는 기존의 상-하 블록만 수평 전단키에 의해 지지되는 방식이 아닌, 상-하, 좌-우 및 전-후의 모든 블록이 결합됨으로써 블록의 전체 단면이 전단에 저항하는 입체결합 옹벽블록을 제안하였다. 전면블록과 배면블록의 배열 형태에 따른 수평전단강도와 기초콘크리트와 블록간 마찰저항강도를 실험적으로 평가하고, 설계를 위한 전단강도 산정식을 제시하였다. 전단키 방식의 기존 조립식 옹벽블록과 수평전단강도를 비교하여, 제안된 입체결합 옹벽블록의 전단저항강도가 매우 우수함을 검증하였다. 본 연구를 통해 제안된 전단강도 산정식은 입체결합 옹벽블록을 사용한 블록쌓기옹벽의 설계와 안정성 검토에 기초 자료로 활용 가능할 것으로 판단된다. 또한, 입체결합 옹벽블록은 블록쌓기옹벽의 구조 안정성을 개선하여 기후변화에 따른 복합재난 대응에도 좋은 해법을 제공할 수 있을 것으로 기대된다.

키워드

블록쌓기옹벽

입체결합 옹벽블록

보강토 옹벽

수평전단실험

전단 강도

References

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Information

Publisher :Korean Geo-Environmental Society
Publisher(Ko) :한국지반환경공학회
Journal Title :Journal of the Korean Geo-Environmental Society
Journal Title(Ko) :한국지반환경공학회 논문집
Volume : 26
No :5
Pages :13-25
Received Date : 2025-03-27
Revised Date : 2025-04-02
Accepted Date : 2025-04-21
DOI :https://doi.org/10.14481/jkges.2025.26.5.13

Journal of the Korean Geo-Environmental Society ISSN:1598-0820(Print) 2714-1233(Online) 한국지반환경공학회 논문집

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