Civil Engineering - Theses
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ItemThe structure and strength of Victorian brown coals(University of Melbourne, 1961)A soil mechanics investigation into the structure and strength of Victorian brown coals has been performed and the results of consolidation and triaxial tests explained in terms of a proposed model of coal structure. Brown coal possesses a porous skeleton with aggregates of planar aromatic molecules cross-linked by aliphatic chain structures. The aggregates are effectively in contact with direct chemical linking at the points of contact. However, the bonding within the aggregates is much stronger than that between aggregates and the response of brown coal to stress is dominated by the inter-aggregate contact forces. Brown coal follows an effective stress law and a Hvorslev type law, with Ce/Je approximately 0.25 and �e approximately 35�, is applicable. A frictional type shear strength law is suggested and, good agreement is found between predicted and measured tensile strengths. Consolidation behaviour closely resembles that of a clay and the distribution of moisture contents in brown coal seams is shown to be a consolidation phenomenon. Other features in common with clays are the correlation of dimensionless parameters and the existence of a critical voids ratio line.
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ItemState of Victoria: a description of the Loch Garry Flood Protection Scheme: Goulburn River levees( 1924)In dealing with the subject of the Loch Garry Flood Protection Scheme, no attempt will be made to describe in detail all Flood Protective works carried out along the Goulburn River, but, in order to explain clearly the present position in regard to such works, the more important geographical and physical characteristics of the Goulburn River will be described and a brief outline will be given of the steps leading up to the adoption of the present scheme.