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Geotechnical engineering in tropical residual soils
158A used to predict the propagation of joints and to study the mechanics of slopes under such circumstances. Limited data suggest that simplified fracture mechanics are consistent with observed slope stability. Small slopes are shown to be stable at steeper angles than predicted by the rigid block method.
864248 Rock wedge ~ analysis on a persmal computer Abramson, L W In: iteseueb u d ~ Apldirmims i~ itoek Masses (paper to the 26tk US S ~ m i t ~ k Medmmies, Rapid City, 26-28 Jme 1955) VI, P675-682. Pubi Rotterdam: A. A. Balkemao 1985 A computer program written in Microsoft Basic is listed which analyses the stability of a rock wedge formed by two discontinuity planes. It includes user interaction, parametric studies and the application of hydrostatic or rock bolt forces, allowing various slope geometries, rock strength and loading conditions to be simply and quickly studied.
Earth remimilg struetm~ See also: 864262 864251 Fiaite-elemeat ~ for Inlimiam7 m m m m ~ t of a mt and cover tmmel Ports, D M; Knights, M C In: T m u ~ i ~ "85 (paper to the C u f ~ c e , lkiSktoa, 10-15 March 1985) P83-92. Publ London: IMM. 1985 The George Green Tunnel is to be constructed in London Clay by the cut and cover method. Complications arise because of nearby underground railway tunnels and domestic and commercial activity surrounding the site. The finite element method was chosen in preference to the conventional limit equilibrium method to simulate the construction sequence and the complex soil/structure movements, bending moments and stresses. Its use has allowed the identification of the significant parameters that effect the tunnel, embedment of the wall, construction sequence and short- and long-term soil properties.
C o m m m ~ o n meflmds 864249
Geote~akai ~ ia n C t ~ re~l~i mils Brand, E W Proe 1st i m m w / a m / C ~ ea Ge~stc/~m/cs/m Tropical lattcritlc ~ d ~ S d h , b m i k , 11-14 F~y 1955 V3, P23.99. Publ $ao Paulo: Brasilian Society for Soil Mechanics, 1985 An overview of the engineering approaches applicable to residual soils and colluvium, emphasising the heterogeneous aspects of these materials which distinguish them from sedimented soils. Foundation design and construction methods are dealt with briefly and slopes considered in detail. Weathering profiles and suitable site investigation, field and laboratory test methods are ~ . Three basic approaches to slope design are examined: classical, semi-empirical and terrain evaluation. Particular attention is paid to the mechanism of rainfall induced slope failures, with special referer~e to slopes in Hong Kong. A comprehensive bibliography is included. 238 refs.
864252
Use of m i t k ~ slude as ~ material ia road construction Toussaint, A Proc of the Symposinm on the ReclamatioR, Treatmnt a~l Utillzetkm of C~ml M i ~ Wastes, lhwlmm, I0-14 $¢pt 1954 P]3.1-13.]0. Publ London- NCB, ]984 As construction material, the waste material has some special properties. The rock material, which is not resistant to weathering, disintegrates when exposed to the atmosphere and can then be characterized as cohesive due to its contents of mineral matter and its loss of strength caused by changes in moisture content. Mainly due to these characteristics, this type of waste material was at first little used for constructing road embankments. Systematic tests in the laboratory and on full-scale test sites later provided the knowledi~ based on which appropriate construction and compaction methods were worked out, leading to the use of millions of tons of refuse as fill material for embankments. At present, stabilisation by means of hydraulic binders is being tested to produce frost-proof stabilizations of well-graded colliery shale, possibly opening up a new application in road construction.
864250 Peeulari~s of i n / m hehavlmr of tropical late¢Itk and
mmum~ ~as m d ~ r mmral e m m ~
erelkm m l sk~e
Chowdhury, R N Proc Ist l s t ~ Coclfeee~e om Geo~ec&mics in Tropical l~tviffc mud ,.c~m'arntc Soils, ib,adim, I1-14 Febraary ! ~ 5 V3, P341-389. Publ Sao Paulo: Braxilian Society, for Soil Mechanics, 1985 Soil erosion and slope stability in tropical soils are considered briefly in general terms. A discussion of papers submitted to this session of the conference is followed by a discu~on of the relevant sections of the draft report of the Committee on Tropical Soils of the ISSMFE. Finally, conclusions are drawn on some effec~ of relict structures on slope stability and soil erosion, the interrelation between soil erosion and slope stability, rainfall induced failures, progressive failures and landslides and their classification.
Influence of dynamic loads 864253 D e t e m l m a m of Immatmms for a m o ~ for the ¢yclk behavimsr of iatedac, s Drumm, E C; Desai, C S Eartkq ~ Stn~ct Dy~mm VI4, NI, Jan-Feb 1986, PI-8 The nature of the interface hetween a structure and a geoLogical medium can significantly affect their dynamic response. The cychc shear stress-deformation response of dry sand-concrete interfaces is described using a modified gamberg-Osgood model. Results of cyclic direct shear tests are presented, and a method of determining the constitutive parameters for use in the model is described. The model is verified by predicting the behaviour of interfaces under laboratory testing.
© 1986 Pergamon Journals Ltd. Reproduction not permitted
864248 Rock wedge ~ analysis on a persmal computer Abramson, L W In: iteseueb u d ~ Apldirmims i~ itoek Masses (paper to the 26tk US S ~ m i t ~ k Medmmies, Rapid City, 26-28 Jme 1955) VI, P675-682. Pubi Rotterdam: A. A. Balkemao 1985 A computer program written in Microsoft Basic is listed which analyses the stability of a rock wedge formed by two discontinuity planes. It includes user interaction, parametric studies and the application of hydrostatic or rock bolt forces, allowing various slope geometries, rock strength and loading conditions to be simply and quickly studied.
Earth remimilg struetm~ See also: 864262 864251 Fiaite-elemeat ~ for Inlimiam7 m m m m ~ t of a mt and cover tmmel Ports, D M; Knights, M C In: T m u ~ i ~ "85 (paper to the C u f ~ c e , lkiSktoa, 10-15 March 1985) P83-92. Publ London: IMM. 1985 The George Green Tunnel is to be constructed in London Clay by the cut and cover method. Complications arise because of nearby underground railway tunnels and domestic and commercial activity surrounding the site. The finite element method was chosen in preference to the conventional limit equilibrium method to simulate the construction sequence and the complex soil/structure movements, bending moments and stresses. Its use has allowed the identification of the significant parameters that effect the tunnel, embedment of the wall, construction sequence and short- and long-term soil properties.
C o m m m ~ o n meflmds 864249
Geote~akai ~ ia n C t ~ re~l~i mils Brand, E W Proe 1st i m m w / a m / C ~ ea Ge~stc/~m/cs/m Tropical lattcritlc ~ d ~ S d h , b m i k , 11-14 F~y 1955 V3, P23.99. Publ $ao Paulo: Brasilian Society for Soil Mechanics, 1985 An overview of the engineering approaches applicable to residual soils and colluvium, emphasising the heterogeneous aspects of these materials which distinguish them from sedimented soils. Foundation design and construction methods are dealt with briefly and slopes considered in detail. Weathering profiles and suitable site investigation, field and laboratory test methods are ~ . Three basic approaches to slope design are examined: classical, semi-empirical and terrain evaluation. Particular attention is paid to the mechanism of rainfall induced slope failures, with special referer~e to slopes in Hong Kong. A comprehensive bibliography is included. 238 refs.
864252
Use of m i t k ~ slude as ~ material ia road construction Toussaint, A Proc of the Symposinm on the ReclamatioR, Treatmnt a~l Utillzetkm of C~ml M i ~ Wastes, lhwlmm, I0-14 $¢pt 1954 P]3.1-13.]0. Publ London- NCB, ]984 As construction material, the waste material has some special properties. The rock material, which is not resistant to weathering, disintegrates when exposed to the atmosphere and can then be characterized as cohesive due to its contents of mineral matter and its loss of strength caused by changes in moisture content. Mainly due to these characteristics, this type of waste material was at first little used for constructing road embankments. Systematic tests in the laboratory and on full-scale test sites later provided the knowledi~ based on which appropriate construction and compaction methods were worked out, leading to the use of millions of tons of refuse as fill material for embankments. At present, stabilisation by means of hydraulic binders is being tested to produce frost-proof stabilizations of well-graded colliery shale, possibly opening up a new application in road construction.
864250 Peeulari~s of i n / m hehavlmr of tropical late¢Itk and
mmum~ ~as m d ~ r mmral e m m ~
erelkm m l sk~e
Chowdhury, R N Proc Ist l s t ~ Coclfeee~e om Geo~ec&mics in Tropical l~tviffc mud ,.c~m'arntc Soils, ib,adim, I1-14 Febraary ! ~ 5 V3, P341-389. Publ Sao Paulo: Braxilian Society, for Soil Mechanics, 1985 Soil erosion and slope stability in tropical soils are considered briefly in general terms. A discussion of papers submitted to this session of the conference is followed by a discu~on of the relevant sections of the draft report of the Committee on Tropical Soils of the ISSMFE. Finally, conclusions are drawn on some effec~ of relict structures on slope stability and soil erosion, the interrelation between soil erosion and slope stability, rainfall induced failures, progressive failures and landslides and their classification.
Influence of dynamic loads 864253 D e t e m l m a m of Immatmms for a m o ~ for the ¢yclk behavimsr of iatedac, s Drumm, E C; Desai, C S Eartkq ~ Stn~ct Dy~mm VI4, NI, Jan-Feb 1986, PI-8 The nature of the interface hetween a structure and a geoLogical medium can significantly affect their dynamic response. The cychc shear stress-deformation response of dry sand-concrete interfaces is described using a modified gamberg-Osgood model. Results of cyclic direct shear tests are presented, and a method of determining the constitutive parameters for use in the model is described. The model is verified by predicting the behaviour of interfaces under laboratory testing.
© 1986 Pergamon Journals Ltd. Reproduction not permitted