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Constant rate of strain consolidation for very soft clayey soils
48A
813055 CREEP AND ONE-DIMENSIONAL CONSOLIDATION OF CLAY
SOILS (IN ~ ) Felix, B Paris: Laboratoire Central des Ponts et Chaussees, relx~rt LPC 9~, June 1980, 176P Relx~ts creep tests in an oedometer of clay frc~ Cubzac-les-Ponts ani presents a theory of consolidation incorporating stress path dependent creep of the soil skeleton. Gives a numerical solution of consolidation and also a simplified theory in terms of reduced variables. Avail: LCPC, 58 Boulevard Lefebvre, 75732 Paris Cedex 15, Prance
Permeability and capillarity 813056 HYDRAULIC PROPERTIES OF COAL AND RELATED MATERIALS, NORTHERN GREAT PLAINs Rehm, B W; Groenewold, G H; Marinj K A Ground Water, VI8, N6, Nov-Dec 1980, P551-561 Reviews publdahed and unpublished data frc~ study areas in Wyoming, Montana, North Dakota and Alberta, and discusses their variation between and within the different lithologic units. Relates to the estimation of the enviro~nental impact of coal strip mining on groundwater flow systems.
applicable to saturated sedimented fine grained soils of a given value of specific gravity regardless of stress histcryj mineralogical composition or geographical location. 813060 PORE PRESSURE PARAMETERs FOR UNSATURATED SOILS Hasan I J U; Fredlund, D G Can Geotech Jj VI7, N3, Aug 19801 P395-404 Equations for two pare pressure parameters are derived for pare-alr and pcre-wator pressures in unsaturated soils resulting frc~ ur~rained, isotropic loading. 813061 APPROACH FOR THE DETERMINATION OF THE PRECONSOLIDATION PRESSURE IN SENSITIVE CLAYS. TECHNICAL NOTE Leroueil, S; Lebihan, J P; Tavenasj F Can Geotech J, VI7, N3, Aug 1980, P446-453 Proposes a rapid method in which the clay is loaded in a 'one-stage' loading to an axial stress in excess of the estimated Ireeonsolidation pressure. The preconsolidation pressure is determined fr~n observation of t h e pore p r e s s u r e dissipation within a few hours. 813062 ACCURACY CONDITION FOR CONSOLIDATION BY FINITE ~NTS Vermeer, P A; V~'z'ulJt, A Int J Nun Anal Meth Gec~ech, VS, NI, Jan-March
1981, m-14
Compressibility, swelling and consolidation 813057 DRAINED, UNDRAINED, CONSOLIDATING AND DYNAMIC BEHAVIOUR A S S E O N S IN SOILS Zienklewicz, 0 C; Chang, C T; Bettess, P Geotechnique, VBO, N~, Dec 1980, P385-395 Discusses the ranges assumptions by means a soil layer subject Results are given in valid, fc~m.
af validity of t2~e various of an analytical study of to a periodic surface force. a non-dlmensional, generally
813058 CONSOLIDATION OF UNSATURATED SOILS INCLUDING SWELLING AND COLLAPSE BEKAVIOUR Lloret, A; Alonso, E E Geotechnique, V30, N4, Dec 1980, P~9-477 General equations expressing air and water continuity in an unsaturated soil farm the basis for a comprehensive model of volume change behaviour of unsaturated soil which takes into account recent experimental results, in particular the existence of state s~faces for volume change as a means to accommodate, within the same framework, swelling and collapse behavlour. A finite element method coupled with an implicit finite difference scheme has been used far solution. A limited number of cases hs~e been solved to show the capabilities of the method. A general method has also been developed to compute initial air and water Iressures as a result of undrained loading. 813059 UNIVERSAL COMPREssION INDE~ EQUATION Rendon-Herr ero, 0 J Geotech Engng Div ASCE, V106, NC~I%I, Nov 1980, Pl179-1200 An expression is developed empgrically which relates virgin compression index with instantaneous zero-air-voids curve slope, and which is
Finite element solutions of consolidation problems often exhibit oscillating pore pressures, which tend to increase when the time steps are reduced. T~ds phenomenon is investigated and a lower limit for the t~me steps is derived, in terms of the mesh size and the coefficient of consolidation near the draining boundsry. Auth. 813063 SEASONAL HEAVE OF CLAY SOILS Holland, J E; Cameron, D A Civ Eng~g Trans, Inst Er~rs Australia, VCE23, NI, 1981 Critically reviews existing methods of predicting heave and compares with field measurements of actual ground movements. 813064 CONSTANT RATE OF STRAIN CONSOLIDATION FOR VERY SOFT CLA~fEY SOILS Umehara, Y; Zen, K Soils Found, V20, N2, June 1980, P79-95 813065 GRAPHICAL ANALYSIS OF OEDOMETRIC CONSOLIDATION
~ s
(IN m ~ C H )
Mag~an, J P; Deroy, J M Bull Liaison Lab Ponts Chaussees, NI09, Sept-0ct 1980, P53-56 813066 CONSTRUCTION OF ROADS ON COMPRESSIBLE SOILS Paris : Org~nisation for Economic Cooperation ani Development, 1980, 149P This is the report of an OECD study carried out in 1977-8 and considers road building on such soils as clays, silts and peats. The report covers methods of site investigation, soil testing, stability and settlement analysis, methods of soil treatment, instrumentation techniques, and problems of construction, and gives a number of case studies of embankment instability. Avail: OECD, 2 Rue Andre-Pascal, 75775 Paris Cedex 16, France
813055 CREEP AND ONE-DIMENSIONAL CONSOLIDATION OF CLAY
SOILS (IN ~ ) Felix, B Paris: Laboratoire Central des Ponts et Chaussees, relx~rt LPC 9~, June 1980, 176P Relx~ts creep tests in an oedometer of clay frc~ Cubzac-les-Ponts ani presents a theory of consolidation incorporating stress path dependent creep of the soil skeleton. Gives a numerical solution of consolidation and also a simplified theory in terms of reduced variables. Avail: LCPC, 58 Boulevard Lefebvre, 75732 Paris Cedex 15, Prance
Permeability and capillarity 813056 HYDRAULIC PROPERTIES OF COAL AND RELATED MATERIALS, NORTHERN GREAT PLAINs Rehm, B W; Groenewold, G H; Marinj K A Ground Water, VI8, N6, Nov-Dec 1980, P551-561 Reviews publdahed and unpublished data frc~ study areas in Wyoming, Montana, North Dakota and Alberta, and discusses their variation between and within the different lithologic units. Relates to the estimation of the enviro~nental impact of coal strip mining on groundwater flow systems.
applicable to saturated sedimented fine grained soils of a given value of specific gravity regardless of stress histcryj mineralogical composition or geographical location. 813060 PORE PRESSURE PARAMETERs FOR UNSATURATED SOILS Hasan I J U; Fredlund, D G Can Geotech Jj VI7, N3, Aug 19801 P395-404 Equations for two pare pressure parameters are derived for pare-alr and pcre-wator pressures in unsaturated soils resulting frc~ ur~rained, isotropic loading. 813061 APPROACH FOR THE DETERMINATION OF THE PRECONSOLIDATION PRESSURE IN SENSITIVE CLAYS. TECHNICAL NOTE Leroueil, S; Lebihan, J P; Tavenasj F Can Geotech J, VI7, N3, Aug 1980, P446-453 Proposes a rapid method in which the clay is loaded in a 'one-stage' loading to an axial stress in excess of the estimated Ireeonsolidation pressure. The preconsolidation pressure is determined fr~n observation of t h e pore p r e s s u r e dissipation within a few hours. 813062 ACCURACY CONDITION FOR CONSOLIDATION BY FINITE ~NTS Vermeer, P A; V~'z'ulJt, A Int J Nun Anal Meth Gec~ech, VS, NI, Jan-March
1981, m-14
Compressibility, swelling and consolidation 813057 DRAINED, UNDRAINED, CONSOLIDATING AND DYNAMIC BEHAVIOUR A S S E O N S IN SOILS Zienklewicz, 0 C; Chang, C T; Bettess, P Geotechnique, VBO, N~, Dec 1980, P385-395 Discusses the ranges assumptions by means a soil layer subject Results are given in valid, fc~m.
af validity of t2~e various of an analytical study of to a periodic surface force. a non-dlmensional, generally
813058 CONSOLIDATION OF UNSATURATED SOILS INCLUDING SWELLING AND COLLAPSE BEKAVIOUR Lloret, A; Alonso, E E Geotechnique, V30, N4, Dec 1980, P~9-477 General equations expressing air and water continuity in an unsaturated soil farm the basis for a comprehensive model of volume change behaviour of unsaturated soil which takes into account recent experimental results, in particular the existence of state s~faces for volume change as a means to accommodate, within the same framework, swelling and collapse behavlour. A finite element method coupled with an implicit finite difference scheme has been used far solution. A limited number of cases hs~e been solved to show the capabilities of the method. A general method has also been developed to compute initial air and water Iressures as a result of undrained loading. 813059 UNIVERSAL COMPREssION INDE~ EQUATION Rendon-Herr ero, 0 J Geotech Engng Div ASCE, V106, NC~I%I, Nov 1980, Pl179-1200 An expression is developed empgrically which relates virgin compression index with instantaneous zero-air-voids curve slope, and which is
Finite element solutions of consolidation problems often exhibit oscillating pore pressures, which tend to increase when the time steps are reduced. T~ds phenomenon is investigated and a lower limit for the t~me steps is derived, in terms of the mesh size and the coefficient of consolidation near the draining boundsry. Auth. 813063 SEASONAL HEAVE OF CLAY SOILS Holland, J E; Cameron, D A Civ Eng~g Trans, Inst Er~rs Australia, VCE23, NI, 1981 Critically reviews existing methods of predicting heave and compares with field measurements of actual ground movements. 813064 CONSTANT RATE OF STRAIN CONSOLIDATION FOR VERY SOFT CLA~fEY SOILS Umehara, Y; Zen, K Soils Found, V20, N2, June 1980, P79-95 813065 GRAPHICAL ANALYSIS OF OEDOMETRIC CONSOLIDATION
~ s
(IN m ~ C H )
Mag~an, J P; Deroy, J M Bull Liaison Lab Ponts Chaussees, NI09, Sept-0ct 1980, P53-56 813066 CONSTRUCTION OF ROADS ON COMPRESSIBLE SOILS Paris : Org~nisation for Economic Cooperation ani Development, 1980, 149P This is the report of an OECD study carried out in 1977-8 and considers road building on such soils as clays, silts and peats. The report covers methods of site investigation, soil testing, stability and settlement analysis, methods of soil treatment, instrumentation techniques, and problems of construction, and gives a number of case studies of embankment instability. Avail: OECD, 2 Rue Andre-Pascal, 75775 Paris Cedex 16, France