Design of Inclined Covers with Capillary Barrier Effect by S.-E. Parent and A. Cabral

Bussière, Bruno; Aubertin, Michel; Zhan, Guosheng

doi:10.1007/s10706-007-9139-2

Cited by 11 publications

(4 citation statements)

References 13 publications

(17 reference statements)

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“…Analytical solutions may constitute a powerful tool in the pre-feasibility stage of a project. Bussière et al (2007) discussed existing analytical solutions that are based on a steady-state approach. They pointed out that DL is a time-dependent variable; as a consequence, proper evaluation of the behaviour of inclined CCBEs requires the use of transient analysis (Bussière et al 2003;Cifuentes et al 2006;Yanful et al 2006;Aubertin et al 2009).…”

Section: Discussion On the Validity Of Employingmentioning

confidence: 99%

“…They pointed out that DL is a time-dependent variable; as a consequence, proper evaluation of the behaviour of inclined CCBEs requires the use of transient analysis (Bussière et al 2003;Cifuentes et al 2006;Yanful et al 2006;Aubertin et al 2009). Bussière et al (2007) also express concerns about the risk of oversimplifying the design of CCBEs by using analytical solutions, which must be employed with great care. Table 2 Comparison between DL modelled on SEEP/W and theoretical DL calculated by and Ross (1990) The Authors entirely agree with the above.…”

Section: Discussion On the Validity Of Employingmentioning

confidence: 99%

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Assessment of the Design of an Experimental Cover with Capillary Barrier Effect Using 4 Years of Field Data

2011

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One important step in the design of inclined covers with capillary barrier effect (CCBE) is the determination of the water diversion length (DL). Numerical simulations can predict the DL more precisely than steady-state analytical solutions. Nevertheless, as simplified methods have always been part of engineering design, the application of analytical solutions with conservative boundary conditions, may allow engineers to make reasonable predictions, particularly during the pre-feasibility stage of a project. In this study, a CCBE was designed, constructed and instrumented at the Saint-Tite-desCaps landfill, Quebec, Canada. This CCBE included a seepage control layer superimposing a sand-gravel capillary barrier. The seepage control layer was made up of deinking by-products (DBP), an industrial byproduct that was previously disposed of as waste. The capillary barrier was designed using an adaptation of the Ross analytical solution and the scenario considered was that of steady-state flow during constant seepage flow applied uniformly at the top of the sandgravel capillary barrier. Although these conditions appear simplistic, they were deemed reasonable because placement of the seepage control layer on the top of the capillary barrier led to very low suctions at the interface, thereby allowing uniform downward seepage rates, limited by the saturated hydraulic conductivity of the DBP. In this paper, a discussion about the behaviour of the cover system based on 4 years of field data from several instruments is presented. The challenge of using DBP, more precisely the settlement of the DBP layer and its impact on k sat , is also assessed. The DL was reassessed considering the new k sat . A discussion on the validity of employing analytical solutions to determine DL is also presented. This paper illustrates how certain variables affect the design of inclined CCBEs that include a highly compressible material as seepage control layer.Keywords Cover with capillary barrier effect (CCBE) Á Diversion length Á Seepage control layer 1 Introduction

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Section: Discussion On the Validity Of Employingmentioning

confidence: 99%

Section: Discussion On the Validity Of Employingmentioning

confidence: 99%

Assessment of the Design of an Experimental Cover with Capillary Barrier Effect Using 4 Years of Field Data

2011

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“…(3.25) Figure 3.9 Illustration of diversion length and diversion capacity of a capillary barrier (Tami, 2004c) Several analytical equations have been proposed to calculate the diversion length of a capillary barrier (Bussiere et al, 2007). Steenhuis et al (1991) used the waterentry value of coarse-grained material instead of the pressure that corresponds to the infiltration rate in the SWCC of the coarse-grained layer used by Ross (1990).…”

Section: Lateral Diversionmentioning

confidence: 99%

“…Steenhuis (1991) proposed the use of the water-entry pressure of coarse-grained soil as the bottom integration limit. The Steenhuis's (1991) bottom integration limit is widely accepted by other researchers (Bussiere et al, 2007). On the other hand, the top integration limit of Ross's (1990) equation was modified by Warrick et al (1997) to account for finite thickness.…”

Section: Increase In Lateral Diversion Lengthmentioning

confidence: 99%

Development of dual capillary barrier system using recycled materials

Harnas¹

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At the end of operation, a landfill should be covered in order to reduce water infiltration. A capillary barrier (CB) is a cover system that uses the contrast in hydraulic properties between fine and coarse-grained layers under unsaturated conditions to minimize downward water movement. The performance of a CB in the tropics is tied to its ability to remove water through lateral diversion. Therefore, increasing the lateral diversion capacity of a capillary barrier is an important research area. The use of recycled concrete (RC) and recycled asphalt pavement (RA) is widely accepted in civil engineering applications such as highway pavement construction. Since coarse-grained soil are most suitable for capillary barrier systems, RC and RA could be used as alternative materials for forming capillary barrier cover systems. However, the use of these materials in capillary barrier cover systems has never been investigated. vi

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Acid Mine Drainage From Abandoned Mine Sites: Problematic and Reclamation Approaches

Bussière

2010

Advances in Environmental Geotechnics

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Design of Inclined Covers with Capillary Barrier Effect by S.-E. Parent and A. Cabral

Cited by 11 publications

References 13 publications

Assessment of the Design of an Experimental Cover with Capillary Barrier Effect Using 4 Years of Field Data

Assessment of the Design of an Experimental Cover with Capillary Barrier Effect Using 4 Years of Field Data

Development of dual capillary barrier system using recycled materials

Acid Mine Drainage From Abandoned Mine Sites: Problematic and Reclamation Approaches

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