PJ Fox

A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics

J. Aalbers, SS AbdusSalam, K Abe, V Aerne et autres

Abstract The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for weakly interacting massive particles, while featuring …

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Large Dynamic Direct Shear Machine for Geosynthetic Clay Liners

PJ Fox, CJ Nye, T. G. Morrison, JG Hunter et autres

Abstract A large direct shear machina for static and dynamic shear strength testing of geosynthetic clay liners (GCLs) and GCL liner systems is described. The machine tests rectangular GCL specimens measuring 305 × 1067 mm and has a maximum shear displacement of …

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Getting the measure of spasticity in MS: The Multiple Sclerosis Spasticity Scale (MSSS-88)

JC Hobart, Afsane Riazi, Alan J. Thompson, IM Styles et autres

Efficiency of Seepage Consolidation for Preparation of Clay Substrate for Centrifuge Testing

J Lee, PJ Fox

Abstract Seepage consolidation under normal gravity conditions can be used to prepare clay soil substrates for subsequent testing in a geotechnical centrifuge. Currently available information provides no information regarding the general efficiency of this method, which would be expected to vary widely …

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Discussion of “A Comparative Study of Suction-Induced Seepage Consolidation Versus Centrifuge Consolidation” by R. G. Robinson, T. S. Tan, and F. H. Lee

PJ Fox, J Lee, Tao Qiu

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Laboratory Measurement of GCL Shear Strength

PJ Fox, TD Stark, RH Swan

This paper discusses the laboratory measurement of internal and interface shear strengths of geosynthetic clay liners (GCLs). All relevant issues are addressed, including test apparatus, gripping/clamping, hydration, consolidation, shear displacement rate, and post-test measurements. The standard 300 x 300 mm direct shear …

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Numerical Model for Contaminant Transport in Consolidating Sediments

PJ Fox

A numerical model for coupled, one-dimensional, large strain consolidation and contaminant transport, called CCT1, is presented. The large strain consolidation algorithm includes all the capabilities of a previous code, CS2. The contaminant transport algorithm includes advection, dispersion, and linear equilibrium sorption with …

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Model for Capillary-Induced Radial Flow in Cohesionless Soils

GL Sivakumar Babu, PJ Fox

Abstract Capillary phenomena in cohesionless soils play an important role in the migration of liquids through the unsaturated zone above and close to groundwater sources. The purpose of this paper is to present the results of a theoretical and experimental study of …

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CS4: A Large Strain Consolidation Model for Accreting Soil Layers

PJ Fox

This paper presents a piecewise-linear model, called CS4, for one-dimensional consolidation of an accreting soil layer. CS4 was developed using a fixed Eulerian coordinate system and general constitutive relationships defined by discrete data points. The model includes the effects of vertical strain, …

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Consolidation Characteristics of Wastewater Sludge

AH Aydilek, TB Edil, PJ Fox

Capping is a cost-effective remediation method for soft contaminated sludge. he Madison Metropolitan Sewerage District evaluated different remediation alternatives to treat its polychlorinated biphenyl (PCB) contaminated sludge and the U.S. EPA agreed to permit capping as the method of remediation. Design of …

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Discussion on “Theoretical Evaluation of the Transient Response of Constant Head and Constant Flow-Rate Permeability Tests” by M. Zhang, M. Takahashi, R. H. Morin, and T. Esaki

PJ Fox, Yanfeng Zhu

This short article is a discussion on Theoretical Evaluation of the Transient Response of Constant Head and Constant Flow-Rate Permeability Tests by M. Zhang, M. Takahashi, R. H. Morin, and T. Esaki. The authors of this discussion state that while assumptions of …

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A study of the CBR Bearing Capacity Test for Hydrated Geosynthetic Clay Liners

PJ Fox, DJ De Battista, S. H. Chen

A modified version of the California Bearing Ratio (CBR) penetration test was used to investigate the bearing capacity of hydrated geosynthetic clay liners (GCLs). The bearing capacity of GCLs is a concern because, once hydrated, the soft bentonite may squeeze laterally under …

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