Foundation design for the Skydome Stadium, Toronto

327A 896307 Laboratory studies on mud-pumping into ballast under repetitive rail loading Boominathan, S; Srinivasan, G R Indian Geotech d VI8, N1, Jan 1988, P31-47 Settlement of railway lines on weak subgrades due to pumping of mud into the ballast under repetitive wheel loads and consequent loss of ballast presents problems in India. A geotextile between subgrade and ballast is proposed as a solution. Field experiences are described. An attempt has been made to develop a testing machine to simulate field conditions and to study the influence of water content, soil texture, and geofabric layers on mud pumping. Results are presented and discussed. 896308 Data acquisition and analysis for reinforced soil bases under cyclic loading Bauer, G E; Abd El-Halim, A O; Selvadurai, A P S Proc Symposium on Computer Aided Design and Monitoring in Geotechnical Engineering, Bangkok, 3-6 December 1986 P77-86. Publ Bangkok: AIT, 1986 A laboratory test rig for examining reinforced and unreinforced road bases under cyclic and static loading conditions is presented. The hydraulic loading system, load cell and LVDT, and data acquisition/computer system are described. Particular attention is paid to software design and data processing. A well graded crushed limestone base over compacted sand was tested. Reinforcement was high strength, high density polymer grid (Tensor ARl). Results illustrate deflection profiles on cycling. 896309 Modified material specifications for base laterites for secondary roads Aggarwal, H R; Jafri, R H Proc Ninth Regional Conference for Africa on Soil Mechanics and Foundation Engineering, Lagos, September 1987 V I , P445-454. Publ Rotterdam: A A Balkema, 1987 Laterites are the usual base course material for roads in Kano, Nigeria. The performance of bituminous roads was correlated with the quality of the base laterite. Samples of the subbase were analysed for CBR, particle size distribution and plasticity index, and the extent of water under sealed pavements was determined. Recommended materials specifications are proposed. 896310 Experimental use of cinder gravels on roads in Ethiopia Newill, D; Robinson, R; Aklilu, K Proc Ninth Regional Conference for Africa on Soil Mec&mics and Foundation Engineering, Lagos, September 1987 VI, P467-488. Publ Rotterdam: A A Balkema, 1987 An extensive study of volcanic cinder gravels has been undertaken to derive specifications for their use on lightly trafficked roads. Compaction tests were performed on 4 cinder gravels, with and without plastic soil fines and water added. A full scale trial examined the behaviour of 20 different cinder gravels in relation to traffic and climate. The density and moisture content, particle size distribution, subgrade strength, cross section levelling and rutting, compaction, roughness, deflection and cracking were monitored. Recommendations are made based on results.

Use of cai~rete in lmV~! roads in l ~ a Lionjanga, A V; Toole, T; Greening, P A K Proc Ninth Regional Conference for Africa on Soil Mechanics and Foundation Engineering, Lagos, September 1987 V l , P489-502. Publ Rotterdam: A A Balkema, 1987 Experience using calcrete deposits for pavement layer construction is described. Classification and engineering properties of the deposits are outlined, particularly engineering tests, use of cement and lime stabilisation, and the role of calcium carbonate and soluble salts. Existing guidelines for use of calcrete are presented. Four experimental roads were constructed using calcretes ranging from calcified sands to hardpan and boulder deposits as subbases, bases and surface dressing aggregates, and results used to develop appropriate specifications and construction techniques. Recommendations are presented for untreated or lime-modified road bases, cement and lime-stabilised road bases, shoulder materials and surfacing materials.

Foundations See also: 896107, 896118, 896119, 896154, 896209, 896282, 896285, 896312 Foundation design for the Skydome Stadium, Toronto Lo, K Y; Cooke, B H Can Geotech J V26, N1, Feb 1989, P22-33 Borehole observations showed the foundation for the stadium to be shale with frequent clay seams and weathered zones. Laboratory and field tests were carried out to determine strength and deformation properties of individual layers, and mass properties of the foundation rock. Uniaxiai compression tests were used for intact rock, triaxial and direct shear tests on clay seams and weathered rock, and plate load tests in the field. Results are discussed along with design considerations for the foundations. 896313 Ultimate capacity of flexible piles under eccentric and inclined loads Meyerhof, G G; Ghosh, D P Can Geotech J V26, N1, Feb 1989, P34-42 Ultimate bearing capacity of flexible model piles and pile groups of various relative stiffnesses in loose sand and soft clay and subjected to eccentric and inclined loading was studied. Results are presented in polar bearing capacity diagrams and are compared with theoretical values for rigid piles, calculated using the concept of effective depth of embedment, showing reasonable correlation. 896314 Horizontal displacements induced by rook excavation: Scotia Plaza, Toronto, Ontario Trow, W A; Lo, K Y Can Geotech J V26, NI, Feb 1989, P114-121 Field and laboratory tests were carried out to evaluate potential horizontal displacements, caused by excavation of limestone and shale bedrock, of adjacent buildings. Initial stress was measured by USBM, deformation using overcoring. Laboratory uniaxial compression, free swell and semi-confined time-dependent deformation tests were performed. Methods to compute elastic and time-dependent displacements are described. Predicted values for magnitude and distribution of

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