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Hydroconsolidation potential of palouse loess
Permeability and capillarity
Compressibility, s~elling and consolidation
See also: 8160~ 9 816042 LOW-FLO~, LOW PERMEABILITY M E A ~ S IN LARGELY IMPERMFABLE ROCKS Proc 0ECD Nuclear Energy ~ency/Intermatlonal Atctnic Energy Agency Workshop, Paris, 19-21 March 1979. Publ Paris: OECD, 1979 Papers aml discussions consider the use of geolc~ical fcrmatlons as radic~ctive waste repositories ~ t h e i m l x n - t a ~ e of t h e r e being no gromslwater to transport waste matter. 816043 EFFECT OF STRESS ON THE PRIMARY F~MEABILITY OF ROCK CORES - A FACET OF RYDRAULIC FRACTURING Heystee, R; Roeglers, J C Can Geotech J, VlS, N2, May 1961, P195-20~ To study the permea~lllty-stress relationship, a radial permeameter was const~,_cted amd three rock types tested. Derived e x l = ' e s s i o n s show that during radially divergent ar~ convergent flow in the permeameter, the state of stress in the rock specimen is tensile and ccml~esslve respectively, The radial permeameter test results show that the permeability of rock increases significantly under tensile stress conditions ard reduces unier compressive stress co~litlons. The results from this study were used to develop a conceptual model which explains the deperdency of breakdown pressure levels on the pressurisation rate. 816044 IMPREGNATION TECHNIQUE USING COLORED EPOXY TO DEFINE POROSITY IN PETROGRAPHIC THIN SECTIONS. NOTE Gardner, K L Can J Earth Sci, VIT, NS, Ang i~0, Pll0All07 Describes a vacuum-assisTed technique for colourad Impregnation of all rock types, clearly defining poroslty, even Im low-permeabillty, very fine grained or semlfrlable material.
816o~5 FIL~ATION A ~ ~ S ~ m ~ ~ (~N G ~ )
~
~N P O ~ S
Wlt~m~nn, L Publ Inst Soil Mech Rock Mech, Univ Fridericiana, Karlsruhe, N86, 1980, 168P A mathematical a~alysis ~ased on a model of soil as a rardcm packed array of spheres. 8160~6 HYDRAULIC CORXDTlVi~Y OF CLOSED ROCK FRACTURE: AN EXPERIMENTAL AND ANALYTICAL STUDY Detour r~y, E In: U~ier~rouni Rock E~Inse~ing (Papers to 13th Canadian Rock Mechanics Symposium, Toronto, 28-29 May 1980), P168-173. Publ Montreal: CD~4, I~80 series of cor~uctivlty exl~n'Iments urder strai@ht flow comdltlons w~-e performed on an artificial granite fracture closed by various compression loads. The object was to obtain data on comductivity versus closure, to determine the applicability of the parallel-plates cubic law add to show evidence of the influence of pressUre-induced d e f o r m a t i o n on the h ~ u l i c conductivity of closed Joints.
A
8160@7 HYDROCONSOLIDATION POTENTIAL OF PALOU~ LOESS Ixxlbell, G T J Geotech Engng Div ASCE, VI07, NGT6, June 1981, FZ33-742 A study was conducted to determine if spread footing foundations on Palouse Loess, from southeastern Washington, USA, would experience additional settlement due to increases in moisture contents. The physical ~ mineralogical prOl~_~ties were examined and compared to the corresponding properties of loess found in the midwestern states. Modified consolidation tests were performed on uniisturbed specimens to examine the effect of initial water content on the settlement characteristics. Test results indicate that increases in moisture contents do not result in excess settlements. The type of clay cementing the loessial soils appears to be the determining factor. 8160~8 PREDICTION OF SWELLING POTENTIAL FOR NATURAL SOILS. TECHNICAL NOTE Bandyopadhyay, S S J Geotech Engng Div ASCE, VI07, N3TS, May
l~l, P658-661 A well-defined relationship was established between the percentage clay sizes present in a soil, the activity of the soll and the Percentage of swell under a 1-psl s~rcharge of a sample compacted to 92 per cent of sts_ndard AASHO density at optimum moisture content. It has been shown that there is an excellent agreement between the predicted swelling and the actual swelling. The average error in Im~edictIng the swelling potential for the 26 soils was foumd to be 6.9 per cent. The predlctlon equations will serve as a valuable tool in the design of ar~ str%Icture on compacted soils. 8160~9 FINITE STRAIN CONSOLIDATION: TEST CONDITIONS. TECHNICAL NOTE Znidarcic, D; Schiffman, R L J Geotech Engng Div ASCE, V!07, NDTS, May
1981, ~o84-688 Establishes the bouniary conditions for constant rate of strain, relaxation and permeability tests within the framework of finite strain consolidation. 816050 THEORY OF ONE-DIMENSIONAL CONSOLIDATION OF SATURATED CLAYS. 2. FINITE NONLIk~AR CONSOLIDATION OF THICK HOMOGENEOUS LAYERS Gibson, R E; Schlffman, R L; Cargill, K W Can Geotech J, V18, N2, May i~!, P280-293 P r e s e n t s a consistent theory of finite strain consolidation which is applicable to loeded, thick, homogeneous clay layers. The effect of the self-weight has been examined. A comperison with conventional consolidation t h e o r y has shown that conventional t.hec~y will seriously overestimate the time of consolidation but can underestimate the amount of excess pore pressure at a given time. This latter situation can lead to an overestimation of the shear stremgth of a deposit.
Compressibility, s~elling and consolidation
See also: 8160~ 9 816042 LOW-FLO~, LOW PERMEABILITY M E A ~ S IN LARGELY IMPERMFABLE ROCKS Proc 0ECD Nuclear Energy ~ency/Intermatlonal Atctnic Energy Agency Workshop, Paris, 19-21 March 1979. Publ Paris: OECD, 1979 Papers aml discussions consider the use of geolc~ical fcrmatlons as radic~ctive waste repositories ~ t h e i m l x n - t a ~ e of t h e r e being no gromslwater to transport waste matter. 816043 EFFECT OF STRESS ON THE PRIMARY F~MEABILITY OF ROCK CORES - A FACET OF RYDRAULIC FRACTURING Heystee, R; Roeglers, J C Can Geotech J, VlS, N2, May 1961, P195-20~ To study the permea~lllty-stress relationship, a radial permeameter was const~,_cted amd three rock types tested. Derived e x l = ' e s s i o n s show that during radially divergent ar~ convergent flow in the permeameter, the state of stress in the rock specimen is tensile and ccml~esslve respectively, The radial permeameter test results show that the permeability of rock increases significantly under tensile stress conditions ard reduces unier compressive stress co~litlons. The results from this study were used to develop a conceptual model which explains the deperdency of breakdown pressure levels on the pressurisation rate. 816044 IMPREGNATION TECHNIQUE USING COLORED EPOXY TO DEFINE POROSITY IN PETROGRAPHIC THIN SECTIONS. NOTE Gardner, K L Can J Earth Sci, VIT, NS, Ang i~0, Pll0All07 Describes a vacuum-assisTed technique for colourad Impregnation of all rock types, clearly defining poroslty, even Im low-permeabillty, very fine grained or semlfrlable material.
816o~5 FIL~ATION A ~ ~ S ~ m ~ ~ (~N G ~ )
~
~N P O ~ S
Wlt~m~nn, L Publ Inst Soil Mech Rock Mech, Univ Fridericiana, Karlsruhe, N86, 1980, 168P A mathematical a~alysis ~ased on a model of soil as a rardcm packed array of spheres. 8160~6 HYDRAULIC CORXDTlVi~Y OF CLOSED ROCK FRACTURE: AN EXPERIMENTAL AND ANALYTICAL STUDY Detour r~y, E In: U~ier~rouni Rock E~Inse~ing (Papers to 13th Canadian Rock Mechanics Symposium, Toronto, 28-29 May 1980), P168-173. Publ Montreal: CD~4, I~80 series of cor~uctivlty exl~n'Iments urder strai@ht flow comdltlons w~-e performed on an artificial granite fracture closed by various compression loads. The object was to obtain data on comductivity versus closure, to determine the applicability of the parallel-plates cubic law add to show evidence of the influence of pressUre-induced d e f o r m a t i o n on the h ~ u l i c conductivity of closed Joints.
A
8160@7 HYDROCONSOLIDATION POTENTIAL OF PALOU~ LOESS Ixxlbell, G T J Geotech Engng Div ASCE, VI07, NGT6, June 1981, FZ33-742 A study was conducted to determine if spread footing foundations on Palouse Loess, from southeastern Washington, USA, would experience additional settlement due to increases in moisture contents. The physical ~ mineralogical prOl~_~ties were examined and compared to the corresponding properties of loess found in the midwestern states. Modified consolidation tests were performed on uniisturbed specimens to examine the effect of initial water content on the settlement characteristics. Test results indicate that increases in moisture contents do not result in excess settlements. The type of clay cementing the loessial soils appears to be the determining factor. 8160~8 PREDICTION OF SWELLING POTENTIAL FOR NATURAL SOILS. TECHNICAL NOTE Bandyopadhyay, S S J Geotech Engng Div ASCE, VI07, N3TS, May
l~l, P658-661 A well-defined relationship was established between the percentage clay sizes present in a soil, the activity of the soll and the Percentage of swell under a 1-psl s~rcharge of a sample compacted to 92 per cent of sts_ndard AASHO density at optimum moisture content. It has been shown that there is an excellent agreement between the predicted swelling and the actual swelling. The average error in Im~edictIng the swelling potential for the 26 soils was foumd to be 6.9 per cent. The predlctlon equations will serve as a valuable tool in the design of ar~ str%Icture on compacted soils. 8160~9 FINITE STRAIN CONSOLIDATION: TEST CONDITIONS. TECHNICAL NOTE Znidarcic, D; Schiffman, R L J Geotech Engng Div ASCE, V!07, NDTS, May
1981, ~o84-688 Establishes the bouniary conditions for constant rate of strain, relaxation and permeability tests within the framework of finite strain consolidation. 816050 THEORY OF ONE-DIMENSIONAL CONSOLIDATION OF SATURATED CLAYS. 2. FINITE NONLIk~AR CONSOLIDATION OF THICK HOMOGENEOUS LAYERS Gibson, R E; Schlffman, R L; Cargill, K W Can Geotech J, V18, N2, May i~!, P280-293 P r e s e n t s a consistent theory of finite strain consolidation which is applicable to loeded, thick, homogeneous clay layers. The effect of the self-weight has been examined. A comperison with conventional consolidation t h e o r y has shown that conventional t.hec~y will seriously overestimate the time of consolidation but can underestimate the amount of excess pore pressure at a given time. This latter situation can lead to an overestimation of the shear stremgth of a deposit.