Advances in concrete construction

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Real-scale field testing for the applicability examination of an improved modular underground arch culvert with vertical walls

  • Tae-Yun Kwon (Department of Civil and Infrastructure Engineering, Gyeongsang National University) ;
  • Jin-Hee Ahn (Department of Civil and Infrastructure Engineering, Gyeongsang National University) ;
  • Hong-duk Moon (Department of Civil and Infrastructure Engineering, Gyeongsang National University) ;
  • Kwang-Il Cho (Research Team, Tekhan Inc.) ;
  • Jungwon Huh (Department of Civil Engineering, Chonnam National University)
  • Received : 2023.01.06
  • Accepted : 2023.08.04
  • Published : 2023.06.25
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Abstract

In this study, an improved modular arch system with the lower arch space composed of a precast arch block and an outrigger was proposed as an underground culvert, and its applicability and structural behaviors were confirmed. This modular arch culvert structure with vertical walls was designed using precast blocks and by adjusting the placement spacing of concrete blocks to the upper part form an arch shape and the lower part form a vertical wall shape, based on previously researched modular arch systems. Owing to the vertical wall of the proposed modular arch system, it is possible to secure a load-carrying capacity and an arch space that can sufficiently resist the earth pressure generated from the backfill soil and loading on the arch system. To verify the structural characteristics, and applicability of the proposed modular precast arch culvert structure, a full-scale modular culvert specimen was fabricated, and a loading test was conducted. By examining its construction process and loading test results, the applicability and constructability of the proposed structure were analyzed along with its structural characteristics. In addition, its the structural predictability and safety for the applicability were evaluated by comparing the construction process and loading test results with the FE analysis results.

Keywords

Acknowledgement

This work is supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant 22TBIP-C162228).

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