Tactile pressure sensors in centrifuge testing

Hesham El Ganainy, Anthony Tessari, Tarek Abdoun, Inthuorn Sasanakul

    Research output: Contribution to journalArticle

    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.

    Original languageEnglish (US)
    JournalGeotechnical Testing Journal
    Volume37
    Issue number1
    DOIs
    StatePublished - Jan 1 2014

    Fingerprint

    earth pressure
    Centrifuges
    Pressure sensors
    centrifuge
    Earth (planet)
    sensor
    Testing
    overconsolidation
    Sensors
    Pressure distribution
    Shear strength
    shear strength
    Sand
    Deposits
    Calibration
    calibration
    Soils
    engineering
    sand
    soil

    Keywords

    • Centrifuge modeling
    • Lateral earth pressure coefficient
    • Tactile pressure sensors

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

    Cite this

    Tactile pressure sensors in centrifuge testing. / Ganainy, Hesham El; Tessari, Anthony; Abdoun, Tarek; Sasanakul, Inthuorn.

    In: Geotechnical Testing Journal, Vol. 37, No. 1, 01.01.2014.

    Research output: Contribution to journalArticle

    Ganainy, Hesham El ; Tessari, Anthony ; Abdoun, Tarek ; Sasanakul, Inthuorn. / Tactile pressure sensors in centrifuge testing. In: Geotechnical Testing Journal. 2014 ; Vol. 37, No. 1.
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