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20 Years of AS 2870 in South East Queensland: A personal view
This paper is about AS 2870 in its various revisions and addendums and its interpretation in SE Queensland with respect to site classification.
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A dynamic method for evaluation of the soil bearing capacity in off-road locomotion
A dynamic method for evaluation of the soil bearing capacity in off-road locomotion, using an impact hammer, is suggested and examined. The pressure-settlement curve obtained by this method of dense sand is comparable to that by the “California Bearing Ratio” test. Coefficients of pressure-sinkage relationship, Kc and n, evaluated by using the hammer-sinkage test results are very close to mean values in the off-road locomotion literature. The value of Kφ found by this method is relatively very high.
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Use of onshore test sites for developing soil characterisation methods and verifying foundation solutions
Tom Lunne, Technical Expert, Norwegian Geotechnical Institute
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Winner AGS NSW Research Award 2016: Establishing a practical framework to predict heat and contaminant transfer in fractured geological media
This paper investigates the mechanisms that govern the transfer of heat or spread of contaminants through fractured geological media. The focus is on understanding the influence of the rock and soil microstructure on the transfer dynamics. Based on the results of recent numerical and analytical findings, a general framework to predict the rate of transfers in fractured geological media is introduced. This framework may potentially aid the assessment of groundwater contamination risks as well as inform the design of improved processes such as geothermal heat recovery techniques.
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Influence of trees on expansive soils in Melbourne
In Australia, distortions and damage of residential buildings caused by tree drying settlement have been widely reported, particularly in areas of expansive or reactive soils. This paper presents the results of two major research projects dealing with trees and expansive clay soils in the Melbourne Metropolitan area. The first project is the long-term field study of the effects of trees on the performance of a building, soil moisture patterns and ground movement in basaltic clay. The second project is a case study of a residential house damaged by expansive soil movement due to tree root drying. The results of long-term field monitoring show that the sap flow rate of a tree closely correlated with solar radiation and greater transpiration occurred during summer. The presence of the tree resulted in an increase in the depth of soil moisture variation. The second study showed that the continuing distortion of the building after it was underpinned was attributable to the drying influence of the tree roots extending 1.5m below the founding depth of the underpins, which was less than 2m.
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AGS SA/NT Celebrates 50 years
A social event to celebrate half a century of geotechnical engineering achievement in SA and NT
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Geotechnical Risk – A contractor’s perspective
Vito Trantino, Executive General Manager - Engineering, Technology and Innovation, McConnell Dowell Contractors