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Design and performance: piled raft foundation beneath the new 26 storey Palace Hotel in Durban
52A the tower foundations and tower such that they can accommodate expected consolidation settlements. Their behaviour will be monitored to provide design information for the remaining components.
931395 Load transfer functions and pile performance monitoring Everett, J P Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 VI, P229-234. Publ Rotterdam. A 4 Balkema. 1991
931392 Engineering and geological aspects of bridge failures during the 1987188 floods in Natal, South Africa Thomas, M A; van Schalkwyk, A Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V4, P2819-2826. Publ Rotterdam." A A Balkema, 1990
The background to the development of load transfer functions, the relations between load transferred from a structural element to a soil and deflection of the element relative to the soil, is briefly outlined. A new and more extensive set of side shear and end bearing transfer functions is presented and applied to model load-deflection curves for single piles. An unload cycle of a load test is also modelled. Excellent correlation is seen between computer predictions and the results of load tests.
Heavy rains in autumn 1987 and spring 1988 led to severe damage to coastal and interior regions of Natal respectively. A number of important road bridges were damaged or destroyed. Foundation failures were mainly the result of deep scour of alluvial deposits in which bridge piers or supporting piles were founded. Some foundations on bedrock also failed, being exposed to water loading over their whole length or debris loading. Recommendations are made for foundation design, bridge location, and suitable geological environments.
931393 Settlement and allowable pressure on sand Rosenthal, G N; van der Vlugt, R Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 II1, P215-222. Publ Rotterdam: A A Balkema, 1991 Previously published charts for estimating allowable soil pressures for footings on sand are outlined. Settlement curves based on the method of Schmertmann are then presented. The required input can be obtained from penetration tests. Considerably higher permissible pressures for smaller footings and lower soil pressures for larger footings are found as compared to the earlier charts. Curves are illustrated for prediction of settlement for square and strip footings at founding depths of 0.5m, and for determination of allowable bearing pressures for 10ram settlement for square and strip footings at 0.5 and lm depth.
931394 Full scale pile testing under controlled conditions Scheele, F; Sellers, E J; Cowburn, S J Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 V1, P223-227. Publ Rotterdam." A A Balkema, 1991 The mechanisms of pile-soil interaction under cyclic loading are not fully understood. To overcome the lack of realistic experimental information for use in mathematical modelling, a test rig to allow systematic investigation of full scale piles has been developed. Load control or displacement control is possible. Initial results are presented for tests of 76mm diameter piles in sand in a laboratory test pit. Realistic ultimate load capacity and load-displacement behaviour in tension and compression are obtained.
931396 Design and performance: piled raft foundation beneath the new 26 storey Palace Hotel in Durban Wilson, C; Zietkiewicz, Z Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 111, P235-242. Pabl Rotterdam." A A Balkema, 1991 The hotel on the Durban beachfront is on a site with about 7m of windblown sands, dense marine sand to 25m, then a sequence of sand, silt, and clay over very soft siltstone. The foundation consists of a 1.5m thick concrete raft on 8m deep, jetted and drilled, cast in situ expanded base piles. Analysis, design, and permissible settlements are described. Nonuniform stiffness among the piles, as a result of their location within the group, can be calculated and accounted for. Initial measured settlements are reported. 931397 New options for foundations on heaving clay Williams, A A B; Pellissier, J P Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 111, P243-247. Publ Rotterdam: A A Balkema, 1991 New designs for foundations suitable for low cost housing on heaving clays are presented. The stiffened raft (Universal Design Method) is based on the plate on mound approach and is best applied with timber frame (articulated) superstructure. Further developments from this are the waffle raft with improved flexibility of architectural layout, and the 'Boucell' or cellular raft with even greater stiffness. The Franki Jackslab has been developed from anchored pile techniques. The slab, cast on a previously flattened surface, is manually jacked to produce a suspended floor.
931398 Development of raft foundations for small structures on heaving clay Pellissier, J P; Williams, A A B Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 II1, P249-255. Publ Rotterdam: A A Balkema, 1991 Foundations for low cost housing on expansive soils have high priority in South Africa. Empirical design methods are not immediately suitable for direct application under local soil and
© 1993 Pergamon Press Ltd. Reproduction not permitted
931395 Load transfer functions and pile performance monitoring Everett, J P Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 VI, P229-234. Publ Rotterdam. A 4 Balkema. 1991
931392 Engineering and geological aspects of bridge failures during the 1987188 floods in Natal, South Africa Thomas, M A; van Schalkwyk, A Proc 6th International Congress International Association of Engineering Geology, Amsterdam, 6-10 August 1990 V4, P2819-2826. Publ Rotterdam." A A Balkema, 1990
The background to the development of load transfer functions, the relations between load transferred from a structural element to a soil and deflection of the element relative to the soil, is briefly outlined. A new and more extensive set of side shear and end bearing transfer functions is presented and applied to model load-deflection curves for single piles. An unload cycle of a load test is also modelled. Excellent correlation is seen between computer predictions and the results of load tests.
Heavy rains in autumn 1987 and spring 1988 led to severe damage to coastal and interior regions of Natal respectively. A number of important road bridges were damaged or destroyed. Foundation failures were mainly the result of deep scour of alluvial deposits in which bridge piers or supporting piles were founded. Some foundations on bedrock also failed, being exposed to water loading over their whole length or debris loading. Recommendations are made for foundation design, bridge location, and suitable geological environments.
931393 Settlement and allowable pressure on sand Rosenthal, G N; van der Vlugt, R Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 II1, P215-222. Publ Rotterdam: A A Balkema, 1991 Previously published charts for estimating allowable soil pressures for footings on sand are outlined. Settlement curves based on the method of Schmertmann are then presented. The required input can be obtained from penetration tests. Considerably higher permissible pressures for smaller footings and lower soil pressures for larger footings are found as compared to the earlier charts. Curves are illustrated for prediction of settlement for square and strip footings at founding depths of 0.5m, and for determination of allowable bearing pressures for 10ram settlement for square and strip footings at 0.5 and lm depth.
931394 Full scale pile testing under controlled conditions Scheele, F; Sellers, E J; Cowburn, S J Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 V1, P223-227. Publ Rotterdam." A A Balkema, 1991 The mechanisms of pile-soil interaction under cyclic loading are not fully understood. To overcome the lack of realistic experimental information for use in mathematical modelling, a test rig to allow systematic investigation of full scale piles has been developed. Load control or displacement control is possible. Initial results are presented for tests of 76mm diameter piles in sand in a laboratory test pit. Realistic ultimate load capacity and load-displacement behaviour in tension and compression are obtained.
931396 Design and performance: piled raft foundation beneath the new 26 storey Palace Hotel in Durban Wilson, C; Zietkiewicz, Z Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 111, P235-242. Pabl Rotterdam." A A Balkema, 1991 The hotel on the Durban beachfront is on a site with about 7m of windblown sands, dense marine sand to 25m, then a sequence of sand, silt, and clay over very soft siltstone. The foundation consists of a 1.5m thick concrete raft on 8m deep, jetted and drilled, cast in situ expanded base piles. Analysis, design, and permissible settlements are described. Nonuniform stiffness among the piles, as a result of their location within the group, can be calculated and accounted for. Initial measured settlements are reported. 931397 New options for foundations on heaving clay Williams, A A B; Pellissier, J P Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 111, P243-247. Publ Rotterdam: A A Balkema, 1991 New designs for foundations suitable for low cost housing on heaving clays are presented. The stiffened raft (Universal Design Method) is based on the plate on mound approach and is best applied with timber frame (articulated) superstructure. Further developments from this are the waffle raft with improved flexibility of architectural layout, and the 'Boucell' or cellular raft with even greater stiffness. The Franki Jackslab has been developed from anchored pile techniques. The slab, cast on a previously flattened surface, is manually jacked to produce a suspended floor.
931398 Development of raft foundations for small structures on heaving clay Pellissier, J P; Williams, A A B Proc Tenth Regional Conference for Africa on Soil Mechanics and Foundation Engineering and the Third International Conference on Tropical and Residual Soils, Maseru, 23-27 September 1991 II1, P249-255. Publ Rotterdam: A A Balkema, 1991 Foundations for low cost housing on expansive soils have high priority in South Africa. Empirical design methods are not immediately suitable for direct application under local soil and
© 1993 Pergamon Press Ltd. Reproduction not permitted