Behavior of the Ground under a Building due to Adjacent Ground Excavation

Jong-Min Lee

doi:10.7843/kgs.2018.34.4.49

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2018 Vol.34, Issue 4 Preview Page

Research Article

Behavior of the Ground under a Building due to Adjacent Ground Excavation 근접굴착시 건물 하부 지반의 거동

30 April 2018. pp. 49-55

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Abstract

A pre-load of bracing was imposed to prevent the horizontal displacement on the strut of the braced wall adjacent to the building during the ground excavation. For this purpose, large scale model tests were conducted, without and with pre-load on braced wall. Adjacent building load was also imposed in different locations, that were 0 m, 1D, 2D on ground surface. In this study, model tests in 1:10 scale were performed in real construction sequences, and adjacent building was 12 m in width and the size of model test pit was 2 m in width, 6 m in height, and 4 m in length. As a result, it was found that the stability of the existing building adjacent to the braced wall within Rankine’s active zone could be greatly enhanced when the horizontal displacement of the braced wall was reduced by applying a pre-load. which was larger than the designated axial force on the strut of the braced wall.

Keywords

Braced wall

Pre-loading

Adjacent ground excavation

Large scale model test

근접굴착 시 지반변위를 억제하여 기존건물의 안정성을 확보하기 위해 굴착공사 중 흙막이벽체의 버팀대에 선행하중을 가하고 그 효과를 확인하였다. 선행하중을 가한 경우와 가하지 않은 경우에 대해서도 대형모형실험을 하였다. 지표면에 건물하중이 없는 경우와 건물하중이 있는 경우 각각 0m, 1D, 2D 에 대해 대형모형실험을 실시하였다. 본 연구에서는 모형실험에는 12m 폭의 기존건물을 축척 1:10으로 사용하였고, 폭 2m, 높이 6m, 길이 4m를 가진 대형토조에서 흙막이벽체와 인접건물의 거동에 대하여 실험을 수행하였다. 그 결과, 흙막이벽체의 버팀대에 선행하중을 작용시켜 흙막이벽체의 수평변위를 억제시켰을때 벽체배면 가상주동활동영역 내에 있는 인접건물의 안정성이 크게 향상되는 것을 확인하였다.

References

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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 : 34
No :4
Pages :49-55
Received Date : 2018-03-30
Revised Date : 2018-04-12
Accepted Date : 2018-04-17
DOI :https://doi.org/10.7843/kgs.2018.34.4.49

Journal of the Korean Geotechnical Society ISSN:1229-2427(Print) 2288-646X(Online) 한국지반공학회 논문집

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