Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지

The Settlement Behavior of Dynamically Compacted High Rock Embankment

고성토 암버력 동다짐 지반의 침하거동

  • 지홍근 (수원대학교 토목공학과, 대우건설 토목사업본부) ;
  • 배경태 (대우건설 토목연구팀) ;
  • 노정현 (대우건설 토목연구팀) ;
  • 유광호 (수원대학교 토목공학과)
  • Published : 2012.04.01
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Abstract

A high rock embankment by means of phased dynamic compaction has hardly carried out in Korea. Settlement of each layer is measured in order to verify the settlement behavior of dynamically compacted high rock embankment. A high rock embankment is generally constructed by dividing into several sub-embankments. Such a sub-embankment and dynamic compaction may induce an increase of pressure at the lower part of embankment and cause a different behavior of ground from initial status. In this study, settlement of a high rock embankment is estimated using a hyperbolic model taking into construction history. The results from prediction are compared with those obtained from field measurements. And second creep settlement is predicted using pre-loading test.

본 연구에서는 부지 내 절토부에서 발생하는 암버력을 층당 7m씩 총 9층으로 단계별 동다짐 성토하여 조성된 최대 63m 고성토(高盛土) 암버력 지반의 거동특성을 파악하기 위해, 각 층 성토 완료 시 지중침하계를 설치하여 성토 중 침하량을 분석하였다. 또한, 암버력을 성토 단계별로 동다짐할 경우 하부 성토지반의 구속압 증가로 인하여 지반의 변형특성이 초기 상태와 차이가 발생할 것으로 예상됨에 따라 시공이력을 반영한 수치해석을 실시하여 지중침하계로부터 계측한 성토 단계별 침하량과 비교하였다. 한편, 최종 성토완료 후 선행재하 시 계측한 침하량을 분석하여, 본 연구대상 현장의 2차 크리프 침하량을 예측하였다.

Keywords

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