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Engineering problems connected with the behaviour of expansive clays in Romania (In French)
183A 894111 Interpretation of expansive soils data and its application to prediction of heave Rama Rao, R; Fredlund, D G Proc 6th International Conference on Expansive Soils, New Deitu', 1-4 December 1987 P207-210. Publ Rotterdam: A A Balkema, 1988
894115 Investigation on the motorway damage due to expansive soil in Greece Christodoulias, J; Gasios, E Proc 6th International Conference on Expansive Soils, New Delhi, 1-4 December 1987 P241-245. Publ Rotterdam: A A Balkema, 1988
Prediction of future ground movements requires knowledge of initial and final in situ stresses and swelling moduli of the soil. The last parameter is often determined by oedometer tests. The necessity to correct oedometer swelling pressure for sample disturbance is emphasised. A basic closed form solution for the equation of prediction of heave is presented.
Significant damage has occurred on the national road A I. Soil samples from the base course showed the presence of expansive clay minerals. A laboratory testing program including classification tests, swell potential estimation, oedometer tests, and X ray diffraction and scanning electron microscope examination was carried out to characterise the material. A lime stabilisation treatment was developed in the laboratory, but rejected as too expensive. As removal of the expansive soils was not feasible, a waterproof polymeric moisture barrier was installed between the expansive roadbase and fill material.
894112 Expert system approach to expansive soil problems Wiseman, G; Zeitlen, J G; Komornik, A; Katke, F G Proc 6th International Conference on Expansive Soils, New Delhi, 1-4 December 1987 P211-216. Publ Rotterdam: A A Balkema. 1988 An interactive computer program to assist in dealing with expansive soils is described. The expert system HEAVE was developed using the shell program EXSYS and runs on a PC. Some general information about artificial intelligence and expert systems is presented. The various output quantities from HEAVE and their determination are illustrated.
894113 Preliminary evaluation of the swelling danger - overview on the Spanish practice Jiminez-Salas, J A; Roy, M Proc 6th International Conference on Expansive Soils, New Delhi, I-4 December 1987 P217-224. Publ Rotterdam: A A Balkema, 1988 The widespread distribution of swelling clay soils in Spain is described. Swelling and collapse mechanisms, quantitative determination of swelling pressure and swell prediction parameters, and swelling under controlled suction are examined. Criteria used in the National Geotechnical Laboratory for prediction of swell are presented, and their suitability, accuracy, and possible improvements discussed.
894114 Engineering problems connected with the behaviour of expansive clays in Romania (In French) Popescu, M Proc 6th International Conference on Expansive Soils, New Delhi, 1-4 December 1987 P225-233. Publ Rotterdam." A A Balkema, 1988 Theoretical and experimental work aimed at better understanding of the behaviour of expansive soils and design criteria for structures on such soils are described. Methods to determine the stress-deformation-time relation and the influence of soil anisotropy on swelling and shrinkage are examined. Problems concerned with slope stability, seasonal swell-shrink cycles and problems caused by raised soil temperature are considered. Mathematical models of these phenomena are proposed, and their predictions compared to test measurements.
894116 Railway roadbed in expansive soil area Ma Ji Proc 6th International Conference on Expansive Soils, New Delhi, 1-4 December 1987 P259-261. Publ Rotterdam: A A Balkema. 1988 The soft fissured expansive clays widespread in many parts of China and their expansion, shrinkage and cracking, and overconsolidation are briefly described. The main problems they cause to the railway system are illustrated: slumps and slides of cutting slopes, differential settlement if they are used in embankments, and heave and shrinkage of the roadbed. 894117 Soil compaction at low moisture contents in dry areas in Kenya O'Connel, M G; Wambura, J H G; Newill, D Proc Ninth Regional Conference for Africa on Soil ~lechanics and Foundation Engineering, Lagos, September 1987 VI, P211-226. Publ Rotterdam: A A Balkema, 1987 Tests on a well-graded clay gravel, undertaken as part of a research programme into achieving high density at low moisture content for road construction, are presented. Dry densitymoisture content relations were determined using rammer dynamic compaction methods and the vibrating hammer method. Pilot compaction trials were used to determine the most effective roller at low moisture content and assess the accuracy of laboratory predictions, and full scale road trials compared the performance of the roadbase at low and optimum moisture content. Results show that high density at low moisture content is possible in the laboratory and the field, vibrating compaction methods were preferred, field CBR measurements at low moisture content were lower than in the laboratory, and analysis of pavement strength parameters such as deflection and radius of curvature indicate designs were adequate. 894118 Consolidation of soft clays beneath reclamation for Songkhla Port, Thailand Pugh, R S Proc Ninth Southeast Asian Geotechnical Conference, Bangkok, 7-11 December 1987 VI, P2,63-2.74. Publ Bangkok: Southeast Asian Geotechnical Society The new deepwater port was constructed by reclamation filling on a soft sea bed. Properties of the clay and sand foundation soils were determined using borehole information and results of cone penetration tests. Conventional laboratory tests and results from other instrumented large scale reclamations on soft clays were used to predict time-settlement behaviour. The
© 1989 Pergamon Press plc. Reproduction not permitted
894115 Investigation on the motorway damage due to expansive soil in Greece Christodoulias, J; Gasios, E Proc 6th International Conference on Expansive Soils, New Delhi, 1-4 December 1987 P241-245. Publ Rotterdam: A A Balkema, 1988
Prediction of future ground movements requires knowledge of initial and final in situ stresses and swelling moduli of the soil. The last parameter is often determined by oedometer tests. The necessity to correct oedometer swelling pressure for sample disturbance is emphasised. A basic closed form solution for the equation of prediction of heave is presented.
Significant damage has occurred on the national road A I. Soil samples from the base course showed the presence of expansive clay minerals. A laboratory testing program including classification tests, swell potential estimation, oedometer tests, and X ray diffraction and scanning electron microscope examination was carried out to characterise the material. A lime stabilisation treatment was developed in the laboratory, but rejected as too expensive. As removal of the expansive soils was not feasible, a waterproof polymeric moisture barrier was installed between the expansive roadbase and fill material.
894112 Expert system approach to expansive soil problems Wiseman, G; Zeitlen, J G; Komornik, A; Katke, F G Proc 6th International Conference on Expansive Soils, New Delhi, 1-4 December 1987 P211-216. Publ Rotterdam: A A Balkema. 1988 An interactive computer program to assist in dealing with expansive soils is described. The expert system HEAVE was developed using the shell program EXSYS and runs on a PC. Some general information about artificial intelligence and expert systems is presented. The various output quantities from HEAVE and their determination are illustrated.
894113 Preliminary evaluation of the swelling danger - overview on the Spanish practice Jiminez-Salas, J A; Roy, M Proc 6th International Conference on Expansive Soils, New Delhi, I-4 December 1987 P217-224. Publ Rotterdam: A A Balkema, 1988 The widespread distribution of swelling clay soils in Spain is described. Swelling and collapse mechanisms, quantitative determination of swelling pressure and swell prediction parameters, and swelling under controlled suction are examined. Criteria used in the National Geotechnical Laboratory for prediction of swell are presented, and their suitability, accuracy, and possible improvements discussed.
894114 Engineering problems connected with the behaviour of expansive clays in Romania (In French) Popescu, M Proc 6th International Conference on Expansive Soils, New Delhi, 1-4 December 1987 P225-233. Publ Rotterdam." A A Balkema, 1988 Theoretical and experimental work aimed at better understanding of the behaviour of expansive soils and design criteria for structures on such soils are described. Methods to determine the stress-deformation-time relation and the influence of soil anisotropy on swelling and shrinkage are examined. Problems concerned with slope stability, seasonal swell-shrink cycles and problems caused by raised soil temperature are considered. Mathematical models of these phenomena are proposed, and their predictions compared to test measurements.
894116 Railway roadbed in expansive soil area Ma Ji Proc 6th International Conference on Expansive Soils, New Delhi, 1-4 December 1987 P259-261. Publ Rotterdam: A A Balkema. 1988 The soft fissured expansive clays widespread in many parts of China and their expansion, shrinkage and cracking, and overconsolidation are briefly described. The main problems they cause to the railway system are illustrated: slumps and slides of cutting slopes, differential settlement if they are used in embankments, and heave and shrinkage of the roadbed. 894117 Soil compaction at low moisture contents in dry areas in Kenya O'Connel, M G; Wambura, J H G; Newill, D Proc Ninth Regional Conference for Africa on Soil ~lechanics and Foundation Engineering, Lagos, September 1987 VI, P211-226. Publ Rotterdam: A A Balkema, 1987 Tests on a well-graded clay gravel, undertaken as part of a research programme into achieving high density at low moisture content for road construction, are presented. Dry densitymoisture content relations were determined using rammer dynamic compaction methods and the vibrating hammer method. Pilot compaction trials were used to determine the most effective roller at low moisture content and assess the accuracy of laboratory predictions, and full scale road trials compared the performance of the roadbase at low and optimum moisture content. Results show that high density at low moisture content is possible in the laboratory and the field, vibrating compaction methods were preferred, field CBR measurements at low moisture content were lower than in the laboratory, and analysis of pavement strength parameters such as deflection and radius of curvature indicate designs were adequate. 894118 Consolidation of soft clays beneath reclamation for Songkhla Port, Thailand Pugh, R S Proc Ninth Southeast Asian Geotechnical Conference, Bangkok, 7-11 December 1987 VI, P2,63-2.74. Publ Bangkok: Southeast Asian Geotechnical Society The new deepwater port was constructed by reclamation filling on a soft sea bed. Properties of the clay and sand foundation soils were determined using borehole information and results of cone penetration tests. Conventional laboratory tests and results from other instrumented large scale reclamations on soft clays were used to predict time-settlement behaviour. The
© 1989 Pergamon Press plc. Reproduction not permitted