연약지반에 설치된 기존 콘크리트 말뚝의 재사용 가능성 평가

초록

This study employed numerical analysis to identify potential issues associated with two scenarios for the removal of existing concrete piles originally installed as foundations for a planned structure. Considering hazard factors that may arise from temporary excavation and backfilling operations, as well as the geotechnical characteristics of the excavation ground and the surrounding groundwater conditions, the analysis compared (i) complete removal of all piles and (ii) staged removal of only the necessary portions around the building. In addition, displacements at each construction stage were evaluated for both scenarios to predict their effects on adjacent ground and structures. The results indicate that decisions regarding pile removal should be made with careful consideration of site-specific ground conditions and groundwater distribution. Furthermore, the carbon emission analysis indicated that the complete removal of the piles results in an additional emission of approximately 9,585 ton-CO2eq. Regarding the reforestation required for carbon neutrality, it was verified that a period of 60 years must elapse following the planting of 76,680 pine trees.

키워드