- Email: [email protected]
Engineering properties of residual soil derived from granite
IIA 911079 Shear strength of normally consolidated and saturated clay
'
Topolnicki,M Proc 12th International Conference on Soil Mechanics and Foundation Engineering, Rio de Janeiro, 13-18 August 1989 VI, P127-132. Publ Rotterdam: A A Balkema, 1989 Tests on clay in a sophisticated biaxial apparatus indicate aspects of behaviour not described by classical soil mechanics concepts. Isochoric plane strain paths following different anisotropic consolidations led to failure, but the stress path did not terminate on reaching the critical state line. At failure, the clay could have the same specific volume but different values of mean effective stress. Shear strength depends not only on void ratio at failure and stress path to failure, but also on consolidation history. Continued isochoric strain causes softening till a state of constant stress is reached.
911080 Vane shear test application on cohesioniess soils Barros, P L A; Barros, C L A Proc 12tk International Conference on Soil Mechanics and Foundation Engineering, Rio de Janeiro, 13-18 August 1989 VI. P171-174. Publ Rotterdam: A A Balkema, 1989 The application of the vane shear test to cohesionless soils is explored. An analytical simulation of the test, based on the solution for a thick walled cylinder under triaxial stress, is proposed for evaluation of friction angle. A linear regression equation linking friction angle to dilatancy was developed from results of laboratory direct shear and vane shear tests. Values from this equation are compared to those of the proposed analytical model.
911081 Shear strength of sand from CPT Bellotti, R; Ghionna, V N; Jamiolkowski, M; Lancellotta, R; Robertson, P K Proc 12tb International Conference on Soil Meckanics and Foundation Engineering, Rio de Janciro, 13-18 August 1989 VI, P179-184. Publ Rotterdam: A A Balkema, 1989 Theoretical and empirical equations to predict shear resistance of clean sands from cone resistance are briefly reviewed. The reliability of several approaches is assessed by comparing friction angles from the CPT in a calibration chamber to those from triaxial compression tests on pluvially deposited samples of Ticino and Hokksund sands. The influences of compressibility, crushability, and in situ stress are considered.
911083 ~ n g properties of residual soil derived from granite Huang, Z L, Huang, C Proc laterttational Conference on Engineering Problems of Regional Soils, Beijing, 11-15 August 1988 1'598-601. Publ Beijing: International Academic Publishers, 1989 Residual granitic soils are found to depths of 60m in Guangdong province, China. The weathering profile can be divided into six zones, from slopewash through residual soil and weathered rock to fresh rock. Composition of residual soils is dependent on parent rock. Three main soil categories are observed, gravelly clay, sandy clay and clay. Compressibility is generally low, bearing capacity high. SPT N count correlates well with deformation modulus.
911084 Method of determining the sheafing strength for a cot slope in expansive soil Li, T D; Zhao, Z X Proc International Conference on Engincering Problems of Regional Soils, Belting, 11-15 August 1988 P606-609. Publ Beijing: International Academic Publishers, 1989 Six expansive clay soils have been examined in the laboratory. Effect of cyclic wetting-drying, overconsolidation and remoulding, and presence of fissures on shear strength, cohesion and friction angle have been studied. Results are discussed with reference to stability of cut slopes.
911085 Shear strength related to catting in Animi 'leek' Liao, J C Prnc International Conference on Engincering Problems of Regional Soils, Be/ring, 11-15 August 1988 P614-617. Publ Beijing: International Academic Publishers, 1989 Structural and slope failures in fissured stiff clay (leck) of the Anhui province in China in the past 30 years have necessitated characterisation of the soil. Laboratory and field measurement and back calculation of shear parameters are described. A mechanism is postulated with sequence fissure opening as soil expands after unloading, stress concentration at the fissure tip causing fissure propagation, softening of the soil around the fissure on wetting, strength decrease and failure along the fissure. Application to a canal bank is presented.
911082 Engineering properties of a residual soil from granite Ferreira, H N; Fonseca, A V D Proc International Conference on Engineering Problems of Regional Soils, Belting, !I-15 August 1988 P576-581. Publ Belting." International Academic Publishers, 1989
911086 Engineering behaviour of the expansive soil in Chengdu, China Liao, S W Proc International Conference on Engineering Problems of Regional Soils, Beijmg , 11-15 August 1988 t'618-620. Pubi Beijing: International Academic Publishers. 1989
The possibility of using local residual soils for road embankments and foundations in Northern Portugal has been examined. Mineralogy and particle size distribution were established. Compaction and CBR tests were carried out on remoulded samples. Oedometer, undrained triaxial, shear, collapsibility, and suction tests were carried out on undisturbed samples. Results are presented and discussed from the viewpoint of potential applications.
Many structural failures in expansive clays of the Chengdu plain are associated with slope instability or differential expansion or settlement. Geological features are described. Laboratory examination shows the soils to be primarily illitic and kaolinitic, medium expansive, overconsolidated and characterised by fissured fabrics. The soil is comparatively strong in its natural state but is weakened by weathering. Application of findings to engineering practice is briefly discussed.
© 1991 Pergamon Press pie. Reproduction not permitted
'
Topolnicki,M Proc 12th International Conference on Soil Mechanics and Foundation Engineering, Rio de Janeiro, 13-18 August 1989 VI, P127-132. Publ Rotterdam: A A Balkema, 1989 Tests on clay in a sophisticated biaxial apparatus indicate aspects of behaviour not described by classical soil mechanics concepts. Isochoric plane strain paths following different anisotropic consolidations led to failure, but the stress path did not terminate on reaching the critical state line. At failure, the clay could have the same specific volume but different values of mean effective stress. Shear strength depends not only on void ratio at failure and stress path to failure, but also on consolidation history. Continued isochoric strain causes softening till a state of constant stress is reached.
911080 Vane shear test application on cohesioniess soils Barros, P L A; Barros, C L A Proc 12tk International Conference on Soil Mechanics and Foundation Engineering, Rio de Janeiro, 13-18 August 1989 VI. P171-174. Publ Rotterdam: A A Balkema, 1989 The application of the vane shear test to cohesionless soils is explored. An analytical simulation of the test, based on the solution for a thick walled cylinder under triaxial stress, is proposed for evaluation of friction angle. A linear regression equation linking friction angle to dilatancy was developed from results of laboratory direct shear and vane shear tests. Values from this equation are compared to those of the proposed analytical model.
911081 Shear strength of sand from CPT Bellotti, R; Ghionna, V N; Jamiolkowski, M; Lancellotta, R; Robertson, P K Proc 12tb International Conference on Soil Meckanics and Foundation Engineering, Rio de Janciro, 13-18 August 1989 VI, P179-184. Publ Rotterdam: A A Balkema, 1989 Theoretical and empirical equations to predict shear resistance of clean sands from cone resistance are briefly reviewed. The reliability of several approaches is assessed by comparing friction angles from the CPT in a calibration chamber to those from triaxial compression tests on pluvially deposited samples of Ticino and Hokksund sands. The influences of compressibility, crushability, and in situ stress are considered.
911083 ~ n g properties of residual soil derived from granite Huang, Z L, Huang, C Proc laterttational Conference on Engineering Problems of Regional Soils, Beijing, 11-15 August 1988 1'598-601. Publ Beijing: International Academic Publishers, 1989 Residual granitic soils are found to depths of 60m in Guangdong province, China. The weathering profile can be divided into six zones, from slopewash through residual soil and weathered rock to fresh rock. Composition of residual soils is dependent on parent rock. Three main soil categories are observed, gravelly clay, sandy clay and clay. Compressibility is generally low, bearing capacity high. SPT N count correlates well with deformation modulus.
911084 Method of determining the sheafing strength for a cot slope in expansive soil Li, T D; Zhao, Z X Proc International Conference on Engincering Problems of Regional Soils, Belting, 11-15 August 1988 P606-609. Publ Beijing: International Academic Publishers, 1989 Six expansive clay soils have been examined in the laboratory. Effect of cyclic wetting-drying, overconsolidation and remoulding, and presence of fissures on shear strength, cohesion and friction angle have been studied. Results are discussed with reference to stability of cut slopes.
911085 Shear strength related to catting in Animi 'leek' Liao, J C Prnc International Conference on Engincering Problems of Regional Soils, Be/ring, 11-15 August 1988 P614-617. Publ Beijing: International Academic Publishers, 1989 Structural and slope failures in fissured stiff clay (leck) of the Anhui province in China in the past 30 years have necessitated characterisation of the soil. Laboratory and field measurement and back calculation of shear parameters are described. A mechanism is postulated with sequence fissure opening as soil expands after unloading, stress concentration at the fissure tip causing fissure propagation, softening of the soil around the fissure on wetting, strength decrease and failure along the fissure. Application to a canal bank is presented.
911082 Engineering properties of a residual soil from granite Ferreira, H N; Fonseca, A V D Proc International Conference on Engineering Problems of Regional Soils, Belting, !I-15 August 1988 P576-581. Publ Belting." International Academic Publishers, 1989
911086 Engineering behaviour of the expansive soil in Chengdu, China Liao, S W Proc International Conference on Engineering Problems of Regional Soils, Beijmg , 11-15 August 1988 t'618-620. Pubi Beijing: International Academic Publishers. 1989
The possibility of using local residual soils for road embankments and foundations in Northern Portugal has been examined. Mineralogy and particle size distribution were established. Compaction and CBR tests were carried out on remoulded samples. Oedometer, undrained triaxial, shear, collapsibility, and suction tests were carried out on undisturbed samples. Results are presented and discussed from the viewpoint of potential applications.
Many structural failures in expansive clays of the Chengdu plain are associated with slope instability or differential expansion or settlement. Geological features are described. Laboratory examination shows the soils to be primarily illitic and kaolinitic, medium expansive, overconsolidated and characterised by fissured fabrics. The soil is comparatively strong in its natural state but is weakened by weathering. Application of findings to engineering practice is briefly discussed.
© 1991 Pergamon Press pie. Reproduction not permitted