Volume 37, Issue 1 (January 2014)

    Tactile Pressure Sensors in Centrifuge Testing

    (Received 30 April 2012; accepted 23 August 2013)

    Published Online: 2013

    CODEN: GTJOAD

      Format Pages Price  
    PDF Version 14 $25   ADD TO CART


    Abstract

    Assessing vertical and lateral earth pressure is important in geotechnical and foundation engineering. Vertical stresses are easy to calculate assuming a geostatic stress condition. However, characterizing the lateral earth pressure is primarily based on judgment and empirical correlations that assume a lateral earth pressure coefficient based on the shear strength parameters of the soil. Effects of factors such as overconsolidation, geologic age, and pre-shaking on the lateral earth pressure magnitude and distribution are difficult to assess using only the empirical correlations found in literature. Direct measurements of the lateral earth pressure in the field, full-scale, and centrifuge models are required to fully characterize these factors. This paper discusses the use of grid-based tactile pressure sensors in centrifuge models to study the effects of overconsolidation and pre-shaking on the lateral earth pressure. A new preparation and calibration procedure for the tactile sensors is discussed in detail. A series of five centrifuge tests were performed using dry and saturated sand in normally consolidated, overconsolidated, and pre-shaken deposits. The measured lateral earth pressure distributions are plotted and evaluated. Precautions and recommendations for the use of tactile sensors in centrifuge experiments are given.


    Author Information:

    Ganainy, Hesham El
    Project Engineering Associate, Paul C. Rizzo Associates, Inc., Pittsburgh, PA

    Tessari, Anthony
    Assistant Professor, Dept. of Civil, Structural, and Environmental Engineering, University at Buffalo, Buffalo, NY

    Abdoun, Tarek
    Iovino Chair Professor, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY

    Sasanakul, Inthuorn
    Research Assistant Professor, Dept. of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, NY


    Stock #: GTJ20120061

    ISSN: 0149-6115

    DOI: 10.1520/GTJ20120061

    ASTM International is a member of CrossRef.

    Author
    Title Tactile Pressure Sensors in Centrifuge Testing
    Symposium , 0000-00-00
    Committee D18