172A 856027 Bank sediment type and suspended-sediment transport in sand-hed streams Pizzuto, J E J Sediment Petrol V55. N2, March 1985, P222-225 Sand-bed streams have been studied, and the texture of the bank sediments are closely related to the grain sizes carried in suspension. The best correlation is obtained when deposition rates rather than transport rates are considered. These results, though necessarily limited by the small number of rivers studied, provide a quantitative link between the sediment transport regime of a stream and its sedimentary record.
856028 Large scale test facility for model conduits and arches buried in soil Avalle, D L; Flint, R C L; Kay, J N Proc 4th Australia-New Zealand Conference on Geomechanics, Perth, Western Australia, 14-18 May 1984 VI, P134-138. Publ Barton: lnst of Engineers, 1984 A facility has been constructed at Mile End, South Australia, to test various soil-structure systems, such as buried pipes or conduits, under simulated earth and vehicle loadings. Details of the design, construction and capabilities of the test facility, details of the measurement techniques used to determine soil strains and stresses in the pipes and some typical results from the initial testing programme are presented.
856029 Rigid raft slabs for lightly loaded structures on filling Holland, J E; Richard, J; Coomes, D; Fitzgerald, R Proc 4th Australia-New Zealand Conference on Geomechanics, Perth, Western Australia, 14-18 May 1984 V1, P144-148. Publ Barton: lnst of Engineers, 1984 Outlines a design procedure for rigid raft slabs founded directly on fill material and supporting lightly loaded buildings. The observed performance of this system in the Melbourne area is outlined. The application of this design approach to a number of large commercial and light industrial developments is presented. Fill and slab settlement monitoring for these developments is very briefly presented. The cost benefits of using appropriately designed rigid slabs directly on fill for lightly loaded structures, the need for a careful site investigation and design by a competent soil engineer and the major factors for consideration in ascertaining the soft spot diameter are emphasised.
856030 Rock resistivity in the Lubin (Poland) copper mine and its relation to variations of strain field and occurrences of rockbursts Stopinski, W; Dmowska, g Proc 1st International Congress on Rockbursts and Seismicity in Mines, Johannesburg, Sept 1982 P297-307. Publ Johannesburg: SAIMM, 1984 Investigations into rock resistivity at Lubin copper mine, Poland, are reported. Rock resistivity was monitored at up to 20 sites per mine section (300m x 400m) using graphite electrodes. The changing pattern of rock resistivity has been separated into short (1-12 hours), middle (12 hours - a few days) and extended period changes. Characteristic patterns accompanied approaching rock bursts and also followed blasting and roof detachments. Resistivity is found to increase over a period of a few days prior to nearby rock burst, with a peak sometimes occurring shortly before failure, and generally to decrease with the occurrence of rock burst.
856031 Radon gas emissions and seismicity in deep-level gold mines McDonald, A J Proc 1st International Congress on Rockbursts and Seismicity in Mines, Johannesburg, Sept 1982 P309-315. Publ Johannesburg: SAIMM, 1984 A program of radon monitoring, using standard uranium prospecting tools, was carried out in two gold mines, in order to assess its possible use in rock burst prediction. In some instances, detected fluctuations in radon gas could be correlated with seismicity, suggesting monitoring of radon emission may have potential as a method of rock burst prediction. Recommendations for further development of this program are made. 856032 Tunnelling soils in South Auckland, New Zealand Goldsmith, P R; Smith, E H Proc 4th Australia-New Zealand Conference on Geomechanics, Perth, Western Australia, 14-18 May 1984 V2, P445-449. Publ Barton: Inst of Engineers, 1984 Factors related to the formation of underground 'tunnels', by erosion due to groundwater flow, and the occurrence of tunnelling in New Zealand, are investigated. The process of soil dispersion, the physico-chemical properties of the soil and the necessary climatic, topographic, geological and hydrological conditions are discussed. A site at Manurewa has been studied and methods for determining susceptibility to tunnelling examined, but these are not well defined and give inconsistent results. The need for further work to define soil at risk is stressed. 856033 Underseepage at the Loy Yang Settling Pond Dam Fletcher, S J; Pedler, I V Proc 4th Australia.lVew Zealand Conference on Geomechanics, Perth, Western Australia, 14-18 May 1984 V1, P256'260. Publ Barton: lnst of Engineers. 1984 The Loy Yang Settling Pond was constructed in the Latrobe Valley, Victoria, Australia. to service the 4000MW brown coalfired Loy Yang Power Project during its construction and operation. Filling of the pond commenced in October 1979 and pressures monitored by foundation piezometers and groundwater observation bores indicated that underseepage was occurring. Description is given of the monitoring and investigation programs, the hydrogeological models postulated to explain the cause and extent ofunderseepage are presented and the effect of underseepage on the stability of the dam is discussed. Details of the relief well installation, operation and effectiveness are also discussed. Auth.
856034 Laterite weathering profiles of P r ~ i a n igneous rocks at the Worsley Alumina R ~ r y site, SouthWest Di~sion, Western Australia Gordon, F R Proe 4th Australia-New Zealand Conference on Geomechanics, Perth, Western Australia, 14-18 May 1984 VI, P261-266. Publ Barton. Inst of Engineers, 1984 The engineering properties of the lateritic soils are reviewed, in particular those of the pallid zone - soils having low densities, high permeabilities, high strength and compressibility properties. The main geoteehnical significance of the Worsley profiles was not only the mineralogy, but also the structure of the minerals.