Slope stability and bearing capacity of landfills and simple on-site test methods

Abstract

This study discusses strength characteristics (slope stability, bearing capacity, etc.) of waste landfills through on-site tests that were carried out at 29 locations in 19 sites in Japan and three other countries, and proposes simple methods to test and assess the mechanical strength of landfills on site. Also, the possibility of using a landfill site was investigated by a full-scale eccentric loading test. As a result of this, landfills containing more than about 10 cm long plastics or other fibrous materials were found to be resilient and hard to yield. An on-site full scale test proved that no differential settlement occurs. The repose angle test proposed as a simple on-site test method has been confirmed to be a good indicator for slope stability assessment. The repose angle test suggested that landfills which have high, near-saturation water content have considerably poorer slope stability. The results of our repose angle test and the impact acceleration test were related to the internal friction angle and the cohesion, respectively. In addition to this, it was found that the air pore volume ratio measured by an on-site air pore volume ratio test is likely to be related to various strength parameters.

Keywords

Landfill strength characteristics slope stability bearing capacity repose angle test impact bearing test differential settlement air pore volume ratio

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References

Japan Society of Civil Engineers (2010) Guidelines for Design of Wind Turbine Support Structures and Foundations. Tokyo, Japan: Maruzen, pp.1–454.

Kinki Construction Engineering Office, Kinki Regional Development Bureau, Ministry of Infrastructure, Land, Transportation and Tourism of Japan (1996) Testing Method with Simple Instrument for Measuring Bearing Capacity of soil Ground. Hirakata, Osaka, Japan: Kinki Construction Engineering Office, pp.1–13.

Koelsch

(2009) Static stability of landfills. In: Toolkit Landfill Technology. German Geotechnical Society (DGGT), pp.1–24. Available at: http://www.landfill-technology.info.

Mstukura

Onda

(1989) Angle of repose: A matter of semantics and a variety of the measuring method. In: Environmental Research Center. Tsukuba, Ibaraki, Japan: University of Tsukuba, pp.27–35.

Omine

Yamawaki

Doi

. (2015) Simple testing method for evaluating in-situ strength of solid waste materials by horizontal resistance of short piles. In: ISWA15 World congress Antwerp. Poster session, 7–9 september 2015. Antwerp, Belgium.

Omine

Yamawaki

Kawasaki

. (2014) Estimation of strength of solid waste materials by in-situ direct shear and Earth pressure tests. In: 7th International congress on environmental geotechnics, 10–14 November 2014. Melbourne, Australia, pp.1227–1233.

Salomo

K-P

(2012) Schwimmende gruendung von windkraftanlagen auf deponien am beispiel der deponie georgswerder in Hamburg. In: Baugrundverbesserung in der geotechnik, symposium baugrundverbesserung in der geotechnik, 14–15 september 2010. Wien, Austria, pp.451–466.

The Japanese Geotechnical Society (2004a) JGS 1521–2003, Japanese Standards for Geotechnical and Geoenvironmental Investigation Methods - Standards and Explanations, pp.495–504.

The Japanese Geotechnical Society (2004b) JGS 1612–2003, Japanese Standards for Geotechnical and Geoenvironmental Investigation Methods - Standards and Explanations, pp.579–586.

10.

The Japanese Geotechnical Society (2009) JIS A 1202:2009, Japanese Standards and Explanations of Laboratory Tests of Geomaterials, pp.97–103.

11.

Yamawaki

Omine

Doi

. (2015) Slope stability of solid waste layers inside and outside of Japan. In: ISWA15 World congress Antwerp, 7–9 september 2015. Belgium, pp.499–504.