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Articles 1 - 9 of 9
Full-Text Articles in Geotechnical Engineering
Refined Analysis On Stress State Of Cutoff Wall Of High Asphaltic Core Dam On Super-Deep Overburden, De-Gao Zou, Yong-Qian Qu, Xian-Jing Kong, Kai Chen, Jing-Mao Liu, Jin Gong
Refined Analysis On Stress State Of Cutoff Wall Of High Asphaltic Core Dam On Super-Deep Overburden, De-Gao Zou, Yong-Qian Qu, Xian-Jing Kong, Kai Chen, Jing-Mao Liu, Jin Gong
Rock and Soil Mechanics
The concrete cutoff wall is the main anti-seepage structure of the rockfill dam resting on the deep overburden foundation, and is the key to ensuring the dam safety. Therefore, it is of great significance to accurately simulate the stress state of cutoff wall for evaluation of the rockfill dam resting on the deep overburden. Combining the incremental iteration method and the finite element-scaled boundary finite element coupling method (FEM-SBFEM), this paper realizes the trans-scale refined numerical analysis of the stress and deformation of the rockfill dam, which overcomes the low precision of the conventional midpoint increment method in solving local …
Soil-Bentonite Slurry Trench Cutoff Wall Bore Logs, Jeffrey C. Evans
Soil-Bentonite Slurry Trench Cutoff Wall Bore Logs, Jeffrey C. Evans
NSF Soil-Bentonite Slurry Trench Cutoff Wall Documents
Bore logs for the soil-bentonite slurry trench cutoff wall constructed in Montandon Pennsylvania.
Data Sheet For Vane Shear Testing In Soil-Bentonite Cutoff Wall, Jeffrey C. Evans
Data Sheet For Vane Shear Testing In Soil-Bentonite Cutoff Wall, Jeffrey C. Evans
NSF Soil-Bentonite Slurry Trench Cutoff Wall Datasets
This data sheet shows the measurements taken from vane shear tests in a soil-bentonite slurry trench cutoff wall. The vane obtained for the test was built in accordance to the ASTM standards of designation 2573. Due to the softness of the clay, to ensure the feasibility of acceptable torque resolution, the vane’s diameter, shaft diameter, and vane height at 100 mm, 16.5 mm, and 250 mm respectively were the largest acceptable sizes to use from the abovementioned standards.
Data Sheet For Marchetti Dilatometer In Soil-Bentonite Cutoff Wall, Jeffrey C. Evans
Data Sheet For Marchetti Dilatometer In Soil-Bentonite Cutoff Wall, Jeffrey C. Evans
NSF Soil-Bentonite Slurry Trench Cutoff Wall Datasets
This data sheet shows the measurements taken using a Marchetti dilatometer in a soil-bentonite slurry trench cutoff wall for the purpose of finding the in situ lateral stresses. There are several data sets within the data sheet. Each set is labelled with the time, date, and location along the cutoff wall. The transverse orientation is perpendicular to the wall alignment and the longitudinal orientation is parallel to the wall alignment.
Experimental Study Of Hydraulic Conductivity Of A Soil-Bentonite Cutoff Wall, Landon Crawford Barlow
Experimental Study Of Hydraulic Conductivity Of A Soil-Bentonite Cutoff Wall, Landon Crawford Barlow
Master’s Theses
Soil-bentonite (SB) cutoff walls are commonly employed in the US to control groundwater flow and subsurface contaminant migration. In these applications, both the short-term (as built) integrity of the barrier and the potential for degradation in the integrity of the barrier over time are of critical importance. Although many laboratory studies have been conducted to investigate the performance of SB cutoff walls as hydraulic barriers and the various factors affecting this performance, field investigations are scarce. With support from the National Science Foundation, a 200 m long, 7 m deep, and 0.9 m wide SB cutoff wall has been designed, …
Assessment Of Backfill Hydraulic Conductivity In An Instrumented Soil-Bentonite Cutoff Wall, Landon Barlow, Michael A. Malusis
Assessment Of Backfill Hydraulic Conductivity In An Instrumented Soil-Bentonite Cutoff Wall, Landon Barlow, Michael A. Malusis
Faculty Conference Papers and Presentations
The objective of this paper is to present a comparison of measured hydraulic conductivities (k) for soil-bentonite (SB) backfill within a 60-m-long section of a 200-m-long, 7-m-deep cutoff wall constructed and instrumented for studying SB backfill properties and variability at the field scale. Backfill k was measured using flexible-wall tests (70-mm diameter) on remolded specimens prepared from surface grab samples collected during construction; flexible-wall tests on undisturbed specimens collected from the wall; larger-scale rigid-wall tests (150-mm diameter) on remolded specimens prepared from grab samples; and slug tests conducted within the wall. Applied effective stresses in the laboratory tests …
Soil-Bentonite Slurry Trench Cutoff Wall Closeout Report, Daniel Ruffing
Soil-Bentonite Slurry Trench Cutoff Wall Closeout Report, Daniel Ruffing
NSF Soil-Bentonite Slurry Trench Cutoff Wall Documents
Assessment report of the construction of a soil-bentonite slurry wall including milestone dates, work description, and quality control.
Chemical Compatibility Of Model Soil-Bentonite Backfill Containing Multiswellable Bentonite, Michael A. Malusis, Matthew D. Mckeehan
Chemical Compatibility Of Model Soil-Bentonite Backfill Containing Multiswellable Bentonite, Michael A. Malusis, Matthew D. Mckeehan
Faculty Journal Articles
The objective of this study was to evaluate the chemical compatibility of model soil-bentonite backfills containing multiswellable bentonite (MSB) relative to that of similar backfills containing untreated sodium (Na) bentonite or a commercially available, contaminant resistant bentonite (SW101). Flexible-wall tests were conducted on consolidated backfill specimens (effective stress =34.5 kPa) containing clean sand and 4.5–5.7% bentonite (by dry weight) using tap water and calcium chloride (CaCl2) solutions (10–1,000 mM) as the permeant liquids. Final values of hydraulic conductivity (k) and intrinsic permeability (K) to the CaCl2 solutions were determined after achieving both short-term termination criteria as …
Compressibility And Hydraulic Conductivity Of Zeolite-Amended Soil-Bentonite Backfills, Catherine Hong, Charles D. Shackelford, Michael A. Malusis
Compressibility And Hydraulic Conductivity Of Zeolite-Amended Soil-Bentonite Backfills, Catherine Hong, Charles D. Shackelford, Michael A. Malusis
Faculty Journal Articles
The effect of zeolite amendment for enhanced sorption capacity on the consolidation behavior and hydraulic conductivity, k, of a typical soil-bentonite (SB) backfill for vertical cutoff walls was evaluated via laboratory testing. The consolidation behavior and k of test specimens containing fine sand, 5.8 % (dry wt.) sodium bentonite, and 0, 2, 5, or 10 % (dry wt.) of one of three types of zeolite (clinoptilolite, chabazite-lower bed, or chabazite-upper bed) were measured using fixed-ring oedometers, and k also was measured on separate specimens using a flexible-wall permeameter. The results indicated that addition of a zeolite had little impact …