http://nova.newcastle.edu.au/vital/access/services/Feed ${session.getAttribute("locale")} 5 http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:11296 Masters Research - Master of Philosophy (MPhil) 2013-02-27T03:45:49.019Z ]]> http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:10885 Compaction grouting is the injection of a viscous grout into a soil under high pressure, which then densifies the surrounding soil by reducing void space. Laboratory and field tests of compaction grouting have been carried out. In this paper, a numerical model is used to simulate the compaction grouting process with the primary purpose of investigating relationships among various control parameters, such as injection pressure, void ratio and excess pore water pressure at various radial distances from the injection point. The compaction process is treated as a cavity expansion process in the numerical simulation. The soil is modelled with an elasto-plastic Mohr–Coulomb model using the commercial finite element program ABAQUS. In addition to numerical simulations, pressure-controlled cavity expansion laboratory tests were carried out on completely decomposed granite (CDG) soil specimens. Data collected from laboratory tests are compared with the finite element simulation to validate the finite element analyses. Factors that control the compaction process, such as the coefficient of earth pressure (K), initial void ratio, number of loading cycles and effective confining pressure, are explored in the numerical simulations. 2012-06-08T03:44:43.964Z ]]> http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:9834 The "greatest book ever written" led to the "greatest film project yet undertaken" and also created an impressive influx of Lord of the Rings tourists seeking Middle-earth. While conducting field research for my Doctor of Philosophy into LotR film tourism, I repeatedly travelled the country and met literally hundreds of people whose lives had been transformed because of LotR. Many of these people worked in the tourism industry, while others were from the film industry or other related occupations. Their stories offered unique insights into how LotR films have influenced the world: a perfect inclusion in this collection on LotR. 2012-01-20T00:50:04.750Z ]]> http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:3253 The saturated, stereodefined tetraalcohol 2,3,5,6-endo,endo,endo,endo-tetrakis(hydroxymethyl)bicyclo[2.2.1]heptane (tetol, L¹) and the simple alcohol butane-1,3-diol (L²) form complexes with alkali metal ions (lithium, sodium, potassium, rubidium and caesium), alkali earth cations (magnesium, calcium, strontium and barium) and Ga(III) and Ce(IV) in aqueous solution, characterised by electrospray ionisation mass spectrometry (ESMS). Metal ion exchange between the Li⁺ complex of L¹ and the other metal ions is rapid, with a range of M(L¹)nm⁺ species detected, in addition to solvated species. With the alkal metal ions, M(L¹)⁺ and M(L¹)₂⁺ are dominant, although speciation varies with metal ion size. For the alkaline earth ions, a range of complex ions up to n=8 are observed, although n=1–3 dominate. A preference for M(L¹)₂²⁺ with Mg²⁺ versus M(L¹)₃²⁺ with Ca²⁺ may again relate to a larger ion size. For the higher-charged Ga(III) and Ce(IV), hydroxo species M(OH)(L¹)n(m⁻¹)⁺ are dominant reflecting bulk solution behaviour, which the ESMS studies appear to map generally. 2010-04-27T05:24:17.819Z ]]> http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:3690 The International Geophysical Year (1957–1958) was inspired by the realization that much better and more complete information was needed about the Earth and geospace to understand and manage the complete terrestrial environment on which we depend. So it was that the IGY member countries worked together to deploy a large number of geophysical observatories around the world. These nations were pursuing the major IGY objectives to collect geophysical data as widely as possible, and to provide free access to these data for all scientists around the globe. About 50 permanent stations were set up in the Arctic and Antarctic, and the World Data Center System was established to ensure that the data collected were properly archived and made available without restrictions for scientific research and practical applications. IGY was an outstanding success. It elevated geophysical monitoring to a new level, and set new standards for international collaboration and data-sharing. Many successes of the geophysical sciences in recent times have origins that can be traced back to the IGY. A notable example is the modern era of space exploration. As we approach the 50-year anniversary of the IGY, it is appropriate to seek to build on the IGY achievements through renewed global resolves as well as to review the outcomes of the IGY and celebrate its successes. This is the “IGY+50” concept. 2010-04-27T05:08:09.913Z ]]> http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:5377 In Australia, Q181C Test Method of Direct Shear Testing to estimate the Effective Angle of Internal Friction at Constant Volume Conditions for Granular (Coarse Grained) Materials is commonly applied to assess the suitability of backfills for reinforced earth walls. This paper presents a comparison between the results of three series of shear box tests on a typical ripped rock material, of marginal quality, that might be considered as a possible backfill material for a reinforced earth wall. Tests performed used 300 mm and 60 mm shear boxes, soil samples prepared to sub-19 mm and sub-4.75 mm sizes, and a range of shearing rates. The effect of pre-testing samples was also considered. The results show that accurate effective friction parameter measurements for coarse grained, granular backfill soils require the use of fresh soil specimens for each shearing test; the use of a large shear box that can accommodate soils with relatively large particles; and careful selection of shearing rates so that shearing takes place under drained conditions. If the above requirements are compromised, the measured effective friction angle is likely to be a significant under-estimate of the true effective friction angle, increasing the likelihood of the material failing to meet prescribed material quality standards. 2010-04-27T04:37:32.092Z ]]> http://nova.newcastle.edu.au/vital/access/manager/Repository/uon:5272 This note examines the classic passive earth resistance of cohesionless soil by using two newly developed numerical procedures based on finite element formulations of the bound theorems of limit analysis and non-linear programming techniques. Solutions using upper and lower bounds are presented to complement the previous studies of this problem. The parameters studied are soil-wall interface friction, wall inclination, backfill surface configuration and the wall's weight. 2010-04-27T04:33:01.339Z ]]>