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Compressibility characteristics of a compacted laterite soil
l~2A
835066 INFLUENCE OF VEGRTATION ON THE SWELLING AND SHRINKING OF CLAYS IN THE U ~ STATES OF AMERICA Holtz, W O Geotechnique, V33, N2, June 1983, P159-163 Vegetation has several effects on soil moisture. In addition to moisture removal by transpiration, the shading of the ground surface, buildup of organic material, retardation of precipitation runoff, ard the formation of water channels by root disintegration can all cause changes in soll moisture patterns. The removal of trees and other vegetation can result in the ~elling of some clay soils with the return of the soil moisture to its natural state. 835067 CONTINUOUS CONSOLIDATION TESTING He~d, K H Ground Engng, VI6, N3, April 1983, P2~-25 Reviews methods of continuous loading consolidation testing, giving advantages and disadvantages. It is suggested that 2 methods of testing are required: one for soft soils and one far stiff soils. 835068 POTENTIAL EXPANSIVE SOILS IN ARABIAN PENINSULA. TECHNICAL NOTE Slater, D E J Geotech Engng Div ASCE, VI09, N G ~ , May
1983, P74-b--7~-6 It is concluded that the geology and conditions of the ~rabian Peninsula, together with observations and laboratc~y test results, irzllcate that potential expansive soils have a probability of occurring. A map indicating areas of 'low to marginal' and 'marginal to high' probability of occurrence of potential expansive soils is lifesented. 835069 THI~IOTROPIC STIFFENING OF CLAY CONSOLIDATED IN TH~ LABORATORY. TECHNICAL NOTE Pusch, R Can Geotech J, rig, N4, Nov 1982, ~517-521
The c~ml~ressibility characteristics of a compacted lateritic soil from Paraiba State, North East Brazil were determined using o e d c ~ e r tests. The results indicated the presence of collapsible soil grains which comminute under load. 835072 CONSOLIDATION CHARAc.'~ISTICS OF DP~)GED MARINE B O T T ~ SEDIMENTS WITH HIGH WATER CONTENT Umahara, Y; Zen, K soils Found, V22, N2, June 1982, P ~ 0 - ~ The consolidation characteristics of various marine bottcm sediments taken from several hsrbours in Japan were investigated using constant rate of strain consolidation tests and sedimentation tests. In addition, the selfweight consolidation phenomena of one marine sediment were observed in a model landfill. The model tests results verify results calculated from the consolidation and sedimentation tests.
835073 E X ~ I M E N T A L
INVESTIGATION OF THE SWELLING AND SHRINKAGE OF ACTIVE CLAYS (IN ITALIAN) Popescu, M Riv Ital Geotech, V15, N$, Oct-Dec 1981, P261-268
A laboratory plane strain model study was performed in artier to investigate t h e swellir~shrinkage behaviour of an active clay mass under stress-free conditions and urger partially confined conditions.
Dynamic properties 835074 CYCLIC TRIAXIAL TESTS WITH CONTINUOUS MEASUREMENT OF DISSIPATED ENERGY Simcock, K J; Davis, R O; Barrill, J B Geotech Test J, V6, NI, March 1983, F35-39 Cyclic triaxial tests were perfcLn~-~ on a unlfarm sand with the amount of ~ w r g y dissipated by the specimen being c o n t i ~ monitored. Dissipated e m e ~ was ixlotted against the
pore ! ~ e s s t w e b u i l d t l p w i t h i n t h e specimen. Samples of natural, disturbed as well as artificially produced clay were consolidated umder a p r e s ~ e cerre~ponding to twice the precomm solidation l~essure, and were then left to rest under a reduced presmare and drained comditions. After various periods of rest, the saml~es were sheared under undrs~ned coalitions. It was observed that the strain at failm~e deca~ased and the shee0r mol~l~s imreased with t h e time elapsed, thus proving that th/xotr¢~c sSzLffening exceeded the softening due to v o l ~ e ir~rease. CLAYS 835070 ON THE CONSOLIDATION OF S E D I M ~ N G Koppula, S D; Morgenstern, N R Can Geotech J, V19, N~, Aug 1982, F260-268 A generalised, one-dimermional, finite ~train consolidation thec~y has been developed in a form suitable to evaluate the progress of consolid~tion in a sedimenting clay. Consolidation of some deltaic deposits off Louisiana is described using the thecry, amd this agrees well with field observations. Excess pare pressures and variation of water content with depth can be predicted by the theca-y. 835071 COMPRESSIBILITY CHARAcI'~ISTICS OF A COMPAc'I~/u LqTERITE SOIL Mal amo, S Bull Int Assoc Engng Geol, N2~, Dec 1981, P151-15h
Rem~Its Imdicate that pare Iresst~e generation amd dissipated energy a r e relate~ but this relationship is depam~em% on the cyclic deviat ~ i c stress, Such rela~onshIps have implications in t h e d e ~ m t i o n of sand liqmefaction potential.
835075 ~ COMPARISON 0~ S~EAR-WAVE ~ 3 C I T I E S . TECHNICAL NOTE Larkin, T J; T a y l ~ P W Can G e o t e ~ J, VIg, ~ , Nov i ~ 2 , P506-507 A p r e v i o u s paper c ~ e d shear wave velocities meas~ed in laboratQ~y t ~ a i ~ tests with valmes from du~nhole seismic tests. Irlff~ermes ~etween laboratory and field results were attributed to sample distm~bamce. The test results are reanalysed in this note, to take into account the stiffness of the laboratory apparatus. 835076 SHAKING T A ~ TESTS ON G R A V ~ DRAINS TO PREVENT LIQUEFACTION OF SAND DEPOSITS Sasakl, Y; Taniguchi, E Soils Found, V22, N3, Sept 1982, PI-14 One method of ~reventing liquefaction of sand deposits during earthquakes is the use of gravel drains which reduce the pare water l~ess~re. This method was investigated using shaking table tests and finite element ar~lyses.
835066 INFLUENCE OF VEGRTATION ON THE SWELLING AND SHRINKING OF CLAYS IN THE U ~ STATES OF AMERICA Holtz, W O Geotechnique, V33, N2, June 1983, P159-163 Vegetation has several effects on soil moisture. In addition to moisture removal by transpiration, the shading of the ground surface, buildup of organic material, retardation of precipitation runoff, ard the formation of water channels by root disintegration can all cause changes in soll moisture patterns. The removal of trees and other vegetation can result in the ~elling of some clay soils with the return of the soil moisture to its natural state. 835067 CONTINUOUS CONSOLIDATION TESTING He~d, K H Ground Engng, VI6, N3, April 1983, P2~-25 Reviews methods of continuous loading consolidation testing, giving advantages and disadvantages. It is suggested that 2 methods of testing are required: one for soft soils and one far stiff soils. 835068 POTENTIAL EXPANSIVE SOILS IN ARABIAN PENINSULA. TECHNICAL NOTE Slater, D E J Geotech Engng Div ASCE, VI09, N G ~ , May
1983, P74-b--7~-6 It is concluded that the geology and conditions of the ~rabian Peninsula, together with observations and laboratc~y test results, irzllcate that potential expansive soils have a probability of occurring. A map indicating areas of 'low to marginal' and 'marginal to high' probability of occurrence of potential expansive soils is lifesented. 835069 THI~IOTROPIC STIFFENING OF CLAY CONSOLIDATED IN TH~ LABORATORY. TECHNICAL NOTE Pusch, R Can Geotech J, rig, N4, Nov 1982, ~517-521
The c~ml~ressibility characteristics of a compacted lateritic soil from Paraiba State, North East Brazil were determined using o e d c ~ e r tests. The results indicated the presence of collapsible soil grains which comminute under load. 835072 CONSOLIDATION CHARAc.'~ISTICS OF DP~)GED MARINE B O T T ~ SEDIMENTS WITH HIGH WATER CONTENT Umahara, Y; Zen, K soils Found, V22, N2, June 1982, P ~ 0 - ~ The consolidation characteristics of various marine bottcm sediments taken from several hsrbours in Japan were investigated using constant rate of strain consolidation tests and sedimentation tests. In addition, the selfweight consolidation phenomena of one marine sediment were observed in a model landfill. The model tests results verify results calculated from the consolidation and sedimentation tests.
835073 E X ~ I M E N T A L
INVESTIGATION OF THE SWELLING AND SHRINKAGE OF ACTIVE CLAYS (IN ITALIAN) Popescu, M Riv Ital Geotech, V15, N$, Oct-Dec 1981, P261-268
A laboratory plane strain model study was performed in artier to investigate t h e swellir~shrinkage behaviour of an active clay mass under stress-free conditions and urger partially confined conditions.
Dynamic properties 835074 CYCLIC TRIAXIAL TESTS WITH CONTINUOUS MEASUREMENT OF DISSIPATED ENERGY Simcock, K J; Davis, R O; Barrill, J B Geotech Test J, V6, NI, March 1983, F35-39 Cyclic triaxial tests were perfcLn~-~ on a unlfarm sand with the amount of ~ w r g y dissipated by the specimen being c o n t i ~ monitored. Dissipated e m e ~ was ixlotted against the
pore ! ~ e s s t w e b u i l d t l p w i t h i n t h e specimen. Samples of natural, disturbed as well as artificially produced clay were consolidated umder a p r e s ~ e cerre~ponding to twice the precomm solidation l~essure, and were then left to rest under a reduced presmare and drained comditions. After various periods of rest, the saml~es were sheared under undrs~ned coalitions. It was observed that the strain at failm~e deca~ased and the shee0r mol~l~s imreased with t h e time elapsed, thus proving that th/xotr¢~c sSzLffening exceeded the softening due to v o l ~ e ir~rease. CLAYS 835070 ON THE CONSOLIDATION OF S E D I M ~ N G Koppula, S D; Morgenstern, N R Can Geotech J, V19, N~, Aug 1982, F260-268 A generalised, one-dimermional, finite ~train consolidation thec~y has been developed in a form suitable to evaluate the progress of consolid~tion in a sedimenting clay. Consolidation of some deltaic deposits off Louisiana is described using the thecry, amd this agrees well with field observations. Excess pare pressures and variation of water content with depth can be predicted by the theca-y. 835071 COMPRESSIBILITY CHARAcI'~ISTICS OF A COMPAc'I~/u LqTERITE SOIL Mal amo, S Bull Int Assoc Engng Geol, N2~, Dec 1981, P151-15h
Rem~Its Imdicate that pare Iresst~e generation amd dissipated energy a r e relate~ but this relationship is depam~em% on the cyclic deviat ~ i c stress, Such rela~onshIps have implications in t h e d e ~ m t i o n of sand liqmefaction potential.
835075 ~ COMPARISON 0~ S~EAR-WAVE ~ 3 C I T I E S . TECHNICAL NOTE Larkin, T J; T a y l ~ P W Can G e o t e ~ J, VIg, ~ , Nov i ~ 2 , P506-507 A p r e v i o u s paper c ~ e d shear wave velocities meas~ed in laboratQ~y t ~ a i ~ tests with valmes from du~nhole seismic tests. Irlff~ermes ~etween laboratory and field results were attributed to sample distm~bamce. The test results are reanalysed in this note, to take into account the stiffness of the laboratory apparatus. 835076 SHAKING T A ~ TESTS ON G R A V ~ DRAINS TO PREVENT LIQUEFACTION OF SAND DEPOSITS Sasakl, Y; Taniguchi, E Soils Found, V22, N3, Sept 1982, PI-14 One method of ~reventing liquefaction of sand deposits during earthquakes is the use of gravel drains which reduce the pare water l~ess~re. This method was investigated using shaking table tests and finite element ar~lyses.