[논문]토사 함량에 따른 자갈 성토재료의 침하특성 분석

이수형; 김지호; 김범준; 윤찬영

doi:10.14481/jkges.2023.24.11.41

[국내논문] 토사 함량에 따른 자갈 성토재료의 침하특성 분석
The Influence of Soil Content on the Settlement Behavior of Gravel Embankement 원문보기

한국지반환경공학회논문집 = Journal of the Korean Geoenvironmental Society, v.24 no.11, 2023년, pp.41 - 49

이수형 (Advanced Railroad Vehicle Division, Korea Railroad Research Institute) , 김지호 (Department of Civil Engineering, Gangneung Wonju National University) , 김범준 (Institute of Disaster Prevention, Gangneung Wonju National University) , 윤찬영 (Department of Civil Engineering, Gangneung Wonju National University)

초록
AI-Helper

본 연구에서는 토사가 혼합된 암성토 제방의 침하 특성을 분석하기 위하여 실트질 재료 혼합에 따른 토사재료의 물리적 특성을 확인하고, 토사재료 혼합 비율에 따른 자갈재료의 압축특성을 분석하였다. 이를 위하여 사질토에 실트질 재료를 혼합하여 토사재료의 압축특성을 분석하였으며, 도상자갈과 유사한 입도분포를 갖는 암성토 재료에 다양한 비율의 토사를 혼합하여 지반을 조성하고 중형챔버를 이용한 일차원 압축실험을 수행하였다. 실험결과, 혼합토사 재료의 경우 Transition Fine Content(TFC)는 하중 조건에 따라서 21~26% 범위로 나타났으며, 토사가 혼합된 암성토 재료의 경우, 자갈 시료 내 토사의 공극 채움비율이 증가함에 따라 총압축량과 크리프 압축이 모두 감소하다가 50% 혼합비 이후에는 다시 침하량이 증가하는 것으로 나타났다.

Abstract ▼ AI-Helper

In this study, we analyzed the settlement characteristics of rockfill embankments mixed with soil by confirming the physical properties of soil materials mixed with silty materials and analyzing the compression characteristics of gravel materials according to the mixing ratio of soil materials. For this, we mixed silty materials into sandy soil to analyze the compression characteristics of soil materials, and we constructed a foundation by mixing various ratios of soil into rockfill materials with a particle distribution similar to that of river gravel, and conducted a one-dimensional compression experiment using a medium-sized chamber. As a result of the experiment, in the case of mixed soil materials, the Transition Fine Content (TFC) appeared in the range of 21~26% depending on the load condition, and in the case of rockfill materials mixed with soil, as the void filling ratio of soil in gravel samples increases, both total compression and creep compression decreases, but after a 50% mixing ratio, the settlement of amount increases again.

주제어

표/그림 (20)

그림 Fig. 1. Grain size distribution
표 Table 1. Fill material for conventional and high - speed railway (KDS 47 10 25, 2021; KCS 47 10 25, 2021)
그림 Fig. 2. Casagrande chart
그림 Fig. 3. Compaction test results on different mixtures
그림 Fig. 4. Variation of void ratio with vertical effective stress in each fine content
표 Table 2. Index properties of kaolinite-s and mixtures
표 Table 3. Index properties of kaolinite-sand mixtures
그림 Fig. 5. Variation of compression index with fine content
표 Table 4. Transition fine contents under different vertical effective stress
표 Table 5. Rock material for concrete track (KCS 10 25, 2021)
그림 Fig. 6. Sample particle size range according to specification
그림 Fig. 7. Various gravel size
그림 Fig. 8. Various mixing ratio
표 Table 6. Test condition
그림 Fig. 9. Photographic image of test setup
그림 Fig. 10. Vertical displacement according to varying for mixing ratio
그림 Fig. 11. Summation of vertical displacement with mixing ratio
그림 Fig. 12. Summation of vertical displacement for each loading
그림 Fig. 13. Creep coefficient with mixing ratio
표 Table 7. Creep coefficient

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