Browsing Research Articles (Civil Engineering) by UP Author "Heymann, Gerhard"

Browsing Research Articles (Civil Engineering) by UP Author "Heymann, Gerhard"

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  • The application of continuous surface wave testing for settlement analysis with reference to a full-scale load test for a bridge at Pont Melin, Wales, UK 
    Heymann, Gerhard; Rigby-Jones, J.; Milne, C.A. (South African Institution of Civil Engineering, 2017-06)
    The presence of a significant thickness of soft silts beneath the site of a proposed new road bridge caused concerns over the suitability of shallow foundations. Despite extensive conventional ground investigations, it ...
  • Application of unsaturated soil mechanics – two years on 
    Gaspar, Tiago Alexandre Valentim; Vandoorne, Rick; Jacobsz, Schalk Willem; Heymann, Gerhard; Grabe, Petrus Johannes (South African Institution of Civil Engineering, 2021-04)
    In recent years, technological advancements in the field of unsaturated soil mechanics have helped improve understanding in this field for both researchers and engineering practitioners. Gaspar & Jacobsz (2019) ...
  • Collapse potential of partly saturafed sandy soils from Mozal, Mozambique 
    Rust, Eben; Heymann, Gerhard; Jones, Gary (South African Institution of Civil Engineering, 2005)
    There is an upsurge in development along the eastern coast of southern Africa that creates the need to re-examine the typical red sands which occur from northern Mozambique to the south coast of KwaZulu-Natal in South-Africa.
  • Collapsible soils an overview 
    Rust, Eben; Heymann, Gerhard; Jones, Gary (South African Institution of Civil Engineering, 2010-04)
    Collapse potential in unsaturated soil was first identified and quantified by researchers in South Africa. A landmark paper was published by Ken Schwartz in 1985 presenting the state of the art at that time. Since then, ...
  • The effect of fabric on the behaviour of gold tailings 
    Chang, N.; Heymann, Gerhard; Clayton, C. (Thomas Telford, 2011)
    Undisturbed sampling of gold tailings, especially under the water table, is difficult and in many cases impossible. For this reason laboratory testing of tailings is generally conducted on reconstituted material. It has ...
  • Ground stiffness measurement by the continuous surface wave test 
    Heymann, Gerhard (South African Institution of Civil Engineering, 2007-03)
    The continuous surface wave (CSW) test is a seismic technique for determining ground stiffness by measuring the velocity of Rayleigh wave propagation along the ground surface. A sinusoidal force is generated by a shaker ...
  • The seismic cone test 
    Heymann, Gerhard (South African Institution of Civil Engineering, 2003)
    The seismic cone test is an in situ test used to measure body wave velocities in soils. Geotechnical parameters that may be derived from the test include void ratio, small strain stiffness and Poisson's ratio. In addition, ...
  • Shear wave velocity of gold tailings 
    Chang, H.P.N.; Heymann, Gerhard (South African Institution of Civil Engineering, 2005)
    To evaluate the liquefaction potential of tailings impoundments, the in situ void ratio and the effective stresses are required. While stresses can be estimated with relative accuracy,the void ratio of tailings has proved ...
  • Soil collapse from an effective stress perspective 
    Brink, George Eksteen; Heymann, Gerhard (South African Institution of Civil Engineering, 2014-10)
    The behaviour of collapsible soil is often quantified by conducting a Collapse Potential Test or double oedometer test. However, these tests interpret the soil behaviour in terms of total stress, while it is well known ...
  • Using small-strain stiffness to predict the load-settlement behaviour of shallow foundations on sand 
    Archer, Andre; Heymann, Gerhard (South African Institution of Civil Engineering, 2015-06)
    Foundation settlement prediction is a challenging task due to the difficulties associated with the quantification of the soil stiffness and the abundance of available analysis methods. Of the different soil stiffness ...