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N M Patel - One of the best experts on this subject based on the ideXlab platform.

  • geotextile covering pad reinforcing system
    Construction and Building Materials, 1991
    Co-Authors: N M Patel
    Abstract:

    Abstract This paper in in two distinct parts. The first reports findings of laboratory studies of fibreglass-geotextile placed at some depth in a virgin Soil Deposit with good variety frictional sand added above the geotextile. Results are compared with tests conducted without geotextile and the contribution of the geotextile by its reinforcing action is established. The second part of the paper reports a parametric study conducted on the geotextile/covering-pad reinforcing system. Experiments conducted on this system involving variation of virgin sands, covering pad sands and the type of reinforcing geotextiles, and friction tests conducted for corresponding combinations of cover sand/geotextile/virgin sand gave further insight into the mechanicc of the reinforcing system.

G. P. Raymond - One of the best experts on this subject based on the ideXlab platform.

  • influence of geosynthetic reinforcement on granular Soils
    Transportation Research Record, 1995
    Co-Authors: I. Ismail, G. P. Raymond
    Abstract:

    Model test results of strip footings on geosynthetic reinforced granular Soil Deposits are presented. The Deposits consisted of a thin strong layer of granular material placed on a weaker granular material and a uniform single layer of the same weak granular material. The two-layer Soil Deposit was reinforced with a single layer of geosynthetic reinforcement. The uniform Soil Deposit was reinforced with one or two layers of geosynthetic reinforcement. The buried depth of the geosynthetic reinforcements was varied to determine the optimum position of placement. The optimum was based on maximizing the ultimate bearing capacity of the footing and reducing its settlement. The effect of repeated loading on the behavior of the geosynthetic reinforced granular Deposits is also examined. The best method for improving the performance of weak granular Soil Deposits is concluded from the results.

Kerry R Rowe - One of the best experts on this subject based on the ideXlab platform.

  • design and behaviour of a geosynthetic reinforced retaining wall and bridge abutment on a yielding foundation
    Geotextiles and Geomembranes, 2005
    Co-Authors: Graeme D Skinner, Kerry R Rowe
    Abstract:

    Abstract There has recently been an increase in the use of geosynthetic reinforced Soil structures to support bridge abutments and approach roads in place of traditional pile supports. In this respect, reinforced Soil walls offer a cost effective alternative to, and have been found to reduce the “bridge bump” effect associated with, pile supported abutments. The paper focuses on the numerical analysis of a hypothetical 6 m high geosynthetic reinforced Soil wall supporting a bridge abutment and approach road constructed on a 10 m thick yielding clayey Soil Deposit. The results of the numerical analysis are compared to current design methodologies to examine the effect of the yielding Soil foundation on the behaviour of the wall and abutment. The study includes the examination of both the internal and external stability of the wall, and focuses on methods of improving the external stability.

Hiroshi Yoneya - One of the best experts on this subject based on the ideXlab platform.

  • description of partial sandy layers of dredged clay Deposit using penetration resistance in installation of prefabricated vertical drains
    Soils and Foundations, 2014
    Co-Authors: Yoichi Watabe, Hiroshi Shinsha, Hiroshi Yoneya
    Abstract:

    Abstract The dredged Soil dumped into a reclamation facility is generally heterogeneous. If the reclamation is executed using hydraulic transportation through pipes, large particles will be Deposited around their outlets, and fine particles will be Deposited apart from those outlets, resulting in significant grain size segregation. Therefore, ground improvement by applying a preload or vacuum to the dredged Soil Deposit with prefabricated vertical drains (PVDs) may result in an unexpected differential settlement. In the present study, partial sandy layers in a dredged Soil Deposit were identified as three-dimensional information using the penetration resistance of the mandrel in the PVD installation, which was recorded as dense information for a wide region. It was clarified that the depth profile of the penetration resistance of the mandrel in the PVD installation was useful for investigating the Soil stratigraphy, because it is closely related to the depth profile of the tip resistance in cone penetration tests (CPTU). The relative penetration resistance, defined as the penetration resistance eliminating the data trend that reflects the effects of the overburden stress, shear strength, sleeve friction and buoyance, is useful for identifying the partial sandy layers in a dredged Soil Deposit. A classification equation was proposed for identifying the partial sandy layers. Firstly, the depth profile without the sandy layer was approximated, and then the threshold value of 1.0 MN/m2 was used to identify the partial sandy layer. To verify the availability of this proposed method, the depth profiles were compared with the results of CPTU tests. In addition, the predicted settlement, calculated on the basis of the stratigraphy obtained using the penetration resistance of the PVDs, was compared with the ground surface profile leveled after vacuum consolidation.

Zhao Cheng - One of the best experts on this subject based on the ideXlab platform.

  • three dimensional scattering and diffraction of plane rayleigh waves bya hemispherical alluvial valley with saturated Soil Deposit
    Chinese Journal of Geophysics, 2007
    Co-Authors: Zhao Cheng
    Abstract:

    The three-dimensional scattering and diffraction of plane Rayleigh-waves by a saturated hemispherical alluvial valley is studied in this paper. In order to consider the real site conditions for the problem, the hemispherical alluvial valley is assumed to be saturated porous media, which is more reasonable than to assume it as an elastic single-phase media; and the half space is assumed to be an elastic single-phase media. We use Fourier-Bessel series expansion technique to formulate the analytic solutions. The results of surface displacement amplitudes of the solutions are presented. The effects of incident wave frequency and the feature of the surface displacement amplitudes are discussed. The results are compared with those of the saturated hemispherical alluvial valley being assumed to be an elastic one-phase media.