Last. Yinghui Tian(University of Melbourne)H-Index: 17
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Abstract null null Transitional soils mixed with terrestrial silicate and marine carbonate deposits are commonly found in coastal regions, which have special geological and geotechnical characteristics. This study examines the engineering properties of the compressibility and crushing characteristics of this type of transitional silicate‑carbonate soils. Scanning Electron Micrograph, X-ray fluorescence and laboratory tests were first conducted to identify the physical and mechanical properties o...
Abstract null null Strength behavior of thermally-damaged rock is quite different from that of undamaged or intact rock. In this study, a concept of degradation of geological strength index (GSI) is used and a GSI-softening model in the framework of generalized Hoek-Brown (H B) failure criterion is proposed to characterize the strength behavior of thermally-damaged rock. The proposed GSI-softening model is then verified using several sets of test data collected from previous publications. It is ...
Abstract null null Searching for an efficient and reliable method to reduce manual intervention and subjective parameter selection during the discontinuity characterization process of rock tunnel faces is an important task. This paper presents a new method for semi-automatic discontinuity characterization in rock tunnel faces using 3D point cloud data, which consists of the following five procedures: (1) regions of interest selection, (2) octree-based local curvature calculation, (3) automatic d...
Abstract null null Debris-flow impact against rigid obstacle involves instant redirection of flow velocity and elevation of flow depth, and could serve as a stringent approach for verification of the two-phase flow models. In this study, kinetic and dynamic behavior of debris-flow impact with varying flow regime has been analyzed on the basis of laboratory tests with distributed measurement. Debris flows interact with obstacle in the modes of vertical jet (deflected vertically) and momentum jump...
Abstract null null After the formation of a landslide barrier lake, additional landslides in the lake area can generate huge waves, which may overtop the landslide dam and eventually lead to breaching failure of the dam. Since landslide dams are natural dams without compaction, the dam materials are heterogeneous, loose and highly erodible, so that the breaching process under wave actions is rather complex. Although a number of model tests have been conducted by different workers, several critic...
Abstract null null To investigate the effect of confining pressure Pc on the seepage mechanism characteristics, a new model of seepage mechanism characteristics coupling with confining pressure has been proposed and analyzed. In this model, fracture closure deformation based on the hydraulic aperture is used to combine with Goodman hyperbolic model of fracture. In theory, the physical relationship among confining pressure, seepage pressure and flow rate has been established. For further validati...
Last. Panagiotis G. Asteris(School of Pedagogical and Technological Education)H-Index: 37
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Abstract null null California bearing ratio (CBR) is one of the important parameters that is used to express the strength of the pavement subgrade of railways, roadways, and airport runways,. CBR is usually determined in the laboratory in soaked conditions, which is an exhaustive and time-consuming process. Therefore, to sidestep the operation of conducting actual laboratory tests, this study presents the development of four efficient soft computing techniques, namely multivariate adaptive regre...
Abstract null null The mechanical properties of soils play a crucial role in site assessment for construction and infrastructure. Soils with low shear strength can become unstable as a result of natural and/or anthropogenic induced forces. Standard geotechnical methods, such as compressive strength tests, quantify the mechanical properties of soils, but these methods have low spatiotemporal resolution and may involve disruption of existing infrastructure. In contrast, the complex conductivity ge...
Abstract null null There are three main factors controlling the formation of debris flow; of these, the ability to evaluate the volume of source materials in a catchment is the most significant. Source materials come from channel bed sediment, nearby landslides and rilling and surface erosion of slopes. The objective of this study was to develop a multi-source method–including field surveys, optical remote sensing interpretation, and interferometric synthetic aperture radar (InSAR) technology–to...
Abstract null null The importance of the geological model in a geotechnical engineering project has long been recognized. However, the uncertainty associated with the geological model has rarely been quantified and explicitly considered in the geotechnical design. This paper explores the role of the geological model uncertainty and the benefit of reducing such uncertainty in a geotechnical design. To this end, the landslide that occurred on 25 April 2010 at 3.3 K of Freeway No. 3 in Northern Tai...