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Research Article

Estimation of Shear Plane at Failed Landfill Using Field and Laboratory Tests

현장 및 실내실험을 이용한 매립지 전단활동면 추정에 대한 연구

Hoseong Choi1
,
Tae-Hyung Kim2*
,
Sung-Wook Kim3
최 호성1
,
김 태형2*
,
김 성욱3
1Master of Science, Department of Civil and Environmental Engineering, Korea Maritime and Ocean University
2Professor, Department of Civil and Environmental Engineering, Korea Maritime and Ocean University
3CEO, Geo-information Research Group Co., Ltd.
1한국해양대학교 건설공학과 석사졸업
2한국해양대학교 건설공학과 교수
3(주)지아이 지반정보연구소 대표이사
*Corresponding Author
30 September 2019. pp. 315-327
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Abstract

Back analysis has been used to evaluate the factor of safety and circular failure plane at the landfill failure site. However, the estimated circular failure plane by back analysis is quite different from what is observed in the field. Thus, this study was conducted to estimate an actual shear failure plane inside the ground which gives a more accurate failure plane. Cone penetration test (CPT), boring test, soft X-ray image scan, density logging, and ultrasonic logging were conducted at the field and laboratory. The result of CPT showed significantly lower cone resistance, pore pressure, and undrained shear strength at a particular part. This part is a possible shear failure plane inside the ground. To validate, the soft X-ray scan images were analyzed and found the disturbed (inclined) bedding plane induced by shear activity at the estimated shear failure plane. Density and ultrasonic logging tests also found a similar result. Thus, the method in this study is possible to estimate the shear failure plane inside the ground.

Keywords
landfill
circular failure
shear failure plane
CPT
X-ray image

매립지 비탈면의 전단파괴 해석은 일반적으로 역해석 통한 파괴원호활동면을 추정하고 안전율을 산정한다. 그러나 현장 상황과 해석을 통해 산정된 원호파괴면 사이에는 서로 상이한 경우가 존재한다. 그래서 연구에서는 매립장에서 발생된 파괴면을 정확히 판정할 수 있는 근거가 될 수 있는 지반내 전단활동파괴면의 위치를 파악하기 위하여 연구를 실시하였다. 이를 위해 콘관입시험, 시추조사, 연 X-선 영상 분석, 밀도검층, 초음파주사검층 등의 현장 및 실내실험을 실시하였다. 조사 결과 콘관입시험 결과로 부터 관입저항치, 간극수압, 비배수전단강도가 주변 구간에 비해 현저히 감소하는 특정 구간을 확인할 수 있었고 지반내의 전단파괴면으로 예측된다. 추가 확인을 위해 실시된 연 X-선 영상 판독 결과 예상 활동 지반층에서 층리가 교란된(경사진) 것으로 나타났다. 밀도검층과 초음파주사검층 결과에서도 유사하게 파괴면 위치에서 다른 위치와는 다른 경향을 보이는 구간을 확인하였다. 본 연구에서 사용된 방법으로 지반내 파괴면 추정이 가능함을 알 수 있었다.

키워드
매립지
원호파괴
전단파괴면
콘관입시험
연 X-선 영상
References
1
Baligh, M.M., Azzouz, A.S., Wissa, A.Z.E., Martin, R.T., Morrison, M.J., 1981, Piezocone penetrometer, Proceedings of Symposium on Cone Penetration Testing and Experience, St. Louis, ASCE, 247-263.
2
Bishop, A.W., 1955, The use of slip circles in the stability analysis of slopes, Geotechnique, 5(1), 7-17.
10.1680/geot.1955.5.1.7
3
Campanella, R.G., Gillespie, D., Robertson, P.K., 1982, Pore pressure during cone penetration testing, Proceedings of the 2nd European Symposium on Penetration Testing, ESOPT II, Balkema, Pub. Amsterdam A.A., 507-512.
4
Day, R.W., 2011, Forensic geotechnical and foundation engineering, McGraw-Hill, New York.
5
Duncan, J.M., 1996, State of the art: limit equilibrium and finite element analysis of slopes, Journal of Geotechnical and Geoenvironmental Engineering, 117(12), 577-596.
10.1061/(ASCE)0733-9410(1996)122:7(577)
6
Geo-Slope, 2004, User's guide, SLOPE/W for slope stability analysis, Geoslope International, Calgary, 444p.
7
Janbu, N., 1968, Slope stability computations, soil mechanics and foundations engineering report, The Technical University of Norway, Trondheim.
8
Katz, O., Aharonov, E., 2006, Landslides in vibrating sand box: What controls types of slope failure and frequency magnitude relations?, Earth and Planetary Science Letters, 247(3-4), 280-294.
10.1016/j.epsl.2006.05.009
9
Kjekstad, O.L., Lunne, T., Clausen, C.J.F., 1978, Comparison between in situ cone resistance and laboratory strength for overconsolidated North Sea clays, Marine Geotechnology, 3(1), 13-36.
10.1080/10641197809379792
10
Klar, A., Aharonov, E., Kalderon-Asael, B., Katz, O., 2011, Analytical and observational relations between landslide volume and surface area, Journal of Geophysical Research, 116, F02001, 1-10.
10.1029/2009JF001604
11
Lunne, T., Christofferson, H.P., Tjelta, T.I., 1985, Engineering use of piezocone data in North Sea clays, Proceedings of the 11th International Conference on Soil Mechanics and Foundation Engineering, San Francisco, Balkema Pub. Rotterdam, 2, 907-912.
12
Lunne, T., Kleven, A., 1981, Role of CPT in North Sea foundation engineering, Proceedings of session at the ASCE National Convention: Cone Penetration Testing and Experience, St. Louis, 76-107.
13
Mitchell, J.K., Chang, M., Seed, R.B., 1993, University of the kettleman hills landfill failure: A retrospective view of the failure investigations and lessons learned, 3rd International Conference on Case Histories in Geotechnical Engineering, 1379-1392.
14
Peng, R., Hou, Y., Zhan, L., Yao, Y., 2016, Back-analyses of landfill instability induced by high water level: Case study of shenzhen landfill, International Journal of Environmental Research and Public Health, 13(126), 1-17.
10.3390/ijerph1301012626771627PMC4730517
15
Rad, N.S., Lunne, T., 1988, Direct correlations between piezocone test results and undrained shear strength of clays, Proceedings of the International Symposium on Penetration Testing, ISOPT-1, Orlando, Balkema Pub. Rotterdam, 2, 911-917.
16
Rahardjo, H., Ong, T.H., Rezaur, R.B., Leong, E.C., 2007, Factors controlling instability of homogeneous soil slopes under rainfall, Journal of Geotechnical and Geoenvironmental Engineering, 133(12), 1532-1543.
10.1061/(ASCE)1090-0241(2007)133:12(1532)
17
Schlumberger, L., 1989, Log Interpretation Principles/Applications, Schlumberger Education Services, Texas, 241p.
18
Schmertmann, J.H., 1978, Guidelines for cone penetration test, performance and design, Report FHWA-TS-787-209, Federal Highway Administration, Washington, 145.
19
Stark, C.P., Guzzetti, F., 2009, Landslide rupture and the probability distribution of mobilized debris volumes, Journal of Geophysical Research Atmospheres 114(2) F00A02, 1-16
10.1029/2008JF001008
20
Towhata, I., 2007, On failure of municipal waste landfill, Progress in Landslide Science, 147-149.
10.1007/978-3-540-70965-7_10
21
Varnes, D.J., 1978, Slope movement and types and preocesses Landslides; analysis and control, transportation research board, National Academy of Sciences, Washington D.C., Special Report 176, Chap.2, 11-33.
22
Yoo, H.-K., Choi, B.-H., 2002, Analysis of factors affecting the slope stability of uncontrolled waste landfill, Journal of the Korean Geoenvironmental Society, 3(1), 5-12 (in Korean with English abstract).
Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 29
  • No :3
  • Pages :315-327
  • Received Date : 2019-09-03
  • Accepted Date : 2019-09-19
  • DOI :https://doi.org/10.9720/kseg.2019.3.315
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