Effect of Apparent Cohesion on Translational Failure Analyses of Landfills

Qian, Xueren; Koerner, Robert M.

doi:10.1061/(asce)1090-0241(2004)130:1(71)

Cited by 43 publications

(48 citation statements)

References 4 publications

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“…(12) can also be used for the seismic stability analysis of the cover system as shown in Figure 4. In this case, the interface strength parameters of the bottom liner are substituted by strength parameters of the cover soil.…”

Section: Equilibrium Equationmentioning

confidence: 99%

“…If there is no seismic force ( 0 h k = ), eq. (12) changes to that of Qian et al [12] , which can be used for the static translational stability analysis of the landfill.…”

Section: Equilibrium Equationmentioning

confidence: 99%

“…The composite liner between the waste and the retaining wall is usually connected with the base composite liner of the landfill, and it possibly occurs the sliding failure along composite liners of the back slope of the landfill, the base of the landfill, and the inside slope of the retaining wall, as shown in Figure 1 [11] . In this paper, approximate solutions of the factor of safety and the yield acceleration coefficient of the landfill are presented based on the limit equilibrium wedge method [12] , which takes into account the shear strength of waste. The results of the borehole investigation, the SASW, and the moderate-scale dynamic triaxial tests are used to calculate the horizontal equivalent acceleration-time history of the sliding landfill along liners by the 1D equivalent linear response analysis.…”

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confidence: 99%

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Seismic stability and permanent displacement of landfill along liners

Chen

Gao

Zhu

et al. 2008

Sci. China Ser. E-Technol. Sci.

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The three-part wedge limit equilibrium method for seismic stability analysis of the landfill along liners is presented. The approximate solutions of the factor of safety and the yield acceleration coefficient are obtained. Parametric studies show that the interface strength of liners, the shear strength of waste and the height of retaining wall can influence the seismic stability of landfill along liners. The density and the shear wave velocity of the field waste are obtained by the borehole investigation and the spectral analysis of surface wave (SASW), respectively. The strain-dependent shear modulus and damping ratio of the artifical waste are obtained by the moderate-scale dynamic triaxial tests. The one-dimensional (1D) equivalent linear dynamic response analysis is used to calculate the horizontal equivalent seismic coefficient-time history of the sliding landfill during earthquake. The seismic permanent displacement of the landfill along liners with different site conditons and heights is evaluated by the Newmark method. The catculated results show that ratio of k y /k max , site conditions, the amplitude and frequency content of the bedrock motion can affect the seismic permanent displacement of the landfill along liners in some degree. Finally, the seismic stability and permanent displacements of three expanded configurations of a certain landfill case are analyzed.landfill, liner, seismic stability, permanent displacement, Newmark method Geosynthetics are widely used in liners and the cover system of a modern municipal solid waste (MSW) landfill. This composite liner system functions effectively a barrier to the leachate and infiltrations, including compacted clay, geotextile, geomembrane, geonet and so on. But the shear strength of some of their interfaces is extremely low, which tends to result in the sliding failure of the landfill along these interfaces [1][2][3] . In the seismic impact zone, seismic design should be conducted for the landfill construction. During earthquake the landfill may slide along liners and the permanent displacement may be induced, which can damage the leachate and the gas collection

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Section: Equilibrium Equationmentioning

confidence: 99%

“…If there is no seismic force ( 0 h k = ), eq. (12) changes to that of Qian et al [12] , which can be used for the static translational stability analysis of the landfill.…”

Section: Equilibrium Equationmentioning

confidence: 99%

mentioning

confidence: 99%

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Seismic stability and permanent displacement of landfill along liners

Chen

Gao

Zhu

et al. 2008

Sci. China Ser. E-Technol. Sci.

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“…Landfill failures were classified into six modes (Mitchell and Mitchell 1992), which were analyzed by traditional slope failure analyses Seed et al 1990;Stark and Poeppel 1994). Qian et al (2003) and Qian and Koerner (2004) employed a double-wedge approach to analyze landfill stability along the bottom liner system. A three-wedge approach was subsequently proposed to evaluate the stability of landfills with engineered berms Qian and Koerner 2009;.…”

Section: Introductionmentioning

confidence: 99%

Centrifuge modeling of municipal solid waste landfill failures induced by rising water levels

Chen

Yang

et al. 2017

Can. Geotech. J.

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New types of synthetic municipal solid wastes (MSWs) were developed, exhibiting engineering characteristics similar to those of real MSWs at different states of degradation in terms of total unit weight, void ratio, water content, compressibility, permeability, stress-strain relationship, and shear strength. Using these synthetic MSWs, several centrifuge model tests on the stability of geosynthetics-lined landfills with rising water levels were performed. The test results revealed the developing processes of MSW landfill failures induced by rising water levels. In most tests, a continuous slide occurred once a critical water level was attained. The ratio of critical water level and landfill height was 0.75-0.92 for present model tests using fresh or partly degraded synthetic MSWs with landfill slope ratio of 1:1-1:3, increasing with the increases of MSW degradation states and decreases of the slope ratio. An engineered berm increased the critical water level by 1.3%-9.5%. The landfills without an engineered berm tended to slide along the bottom liner; however, for normal landfills with an engineered berm and a slope ratio of 1:3, penetrating cracks developed when the failures occurred. These results provide a good reference for water level and stability control of the landfill, and the construction of an engineered berm is suggested to improve the stability of these landfills. Mots-clés : déchets municipaux solides, décharges de déchets, essais sur modèle centrifuge, niveau d'eau critique, rupture de pente.

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“…Qian et al (2003) and Qian & Koerner (2004) used the limit equilibrium method to analyze the landfill slopes. In their studies, the sliding mass was splited into two wedges, the active wedge and the passive wedge.The equilibrium function was set up to obtainthe safety factor after analyzing the two wedges.…”

Section: Introductionmentioning

confidence: 99%

Stability analysis of MSW slope layered by aging

Fan

Huang

Liu

et al. 2016

JGS Special Publication

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As the age of waste changes, the strength of the waste varies during the service years of the landfill. On base of the upper bound limit analysis theorem, two mechanisms for stability analysis of landfills layered by aging are presented in this paper. The rotational-translational mechanism is generalized to analyze the multi-layer municipal solid waste (MSW) landfill slope. The other failure mechanism is comprised of irregular blocks undergoing translational movements. To examine the two mechanisms, the cases of a soil slope layered horizontally and a landfill slope layered by aging are taken into consideration in the case studies. In comparison with the results from the shear strength reduction finite element method (SSRFEM), it demonstrates that the validity of the two mechanisms in the stability analysis of landfill slope cases considering the aging of landfills. In addition, the stability of the Coll Cardús in Spain with complex layers by aging is analyzed, and the results are also compared with those from the SSRFEM.

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Effect of Apparent Cohesion on Translational Failure Analyses of Landfills

Cited by 43 publications

References 4 publications

Seismic stability and permanent displacement of landfill along liners

Seismic stability and permanent displacement of landfill along liners

Centrifuge modeling of municipal solid waste landfill failures induced by rising water levels

Stability analysis of MSW slope layered by aging

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