TY - JOUR
T1 - Piezoelectric probe for measurement of soil stiffness
AU - Hlasko, H. A.
AU - Zeng, X.
PY - 2010/2
Y1 - 2010/2
N2 - Measurement of in situ soil properties is imperative for pavement design. The stiffness and Poisson's ratio of base and sublayers are essential factors in the design and quality control of compaction during construction of highway pavements. It is critical to have a portable and mechanised system to measure these parameters in situ. Currently used techniques including California bearing ratio, resilient modulus, dynamic cone penetrometer and falling weight deflectometer have limitations preventing compliance with requirements for the design of highway pavements. A new device implementing a geophysical probe equipped with piezoelectric sensors to measure the soil properties has been developed. Initial laboratory testing has been performed. The techniques for measuring soil stiffness are discussed, emphasising bender and extender element applications. Data acquired from the new device are compared with the results of an empirical formula developed by Hardin and Richart. Representative test results demonstrating the device performance are discussed.
AB - Measurement of in situ soil properties is imperative for pavement design. The stiffness and Poisson's ratio of base and sublayers are essential factors in the design and quality control of compaction during construction of highway pavements. It is critical to have a portable and mechanised system to measure these parameters in situ. Currently used techniques including California bearing ratio, resilient modulus, dynamic cone penetrometer and falling weight deflectometer have limitations preventing compliance with requirements for the design of highway pavements. A new device implementing a geophysical probe equipped with piezoelectric sensors to measure the soil properties has been developed. Initial laboratory testing has been performed. The techniques for measuring soil stiffness are discussed, emphasising bender and extender element applications. Data acquired from the new device are compared with the results of an empirical formula developed by Hardin and Richart. Representative test results demonstrating the device performance are discussed.
KW - Bender element
KW - Constrained modulus
KW - Extender element
KW - Piezoelectric probe
KW - Poisson's ratio
KW - Shear modulus
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U2 - 10.1080/10298430802465624
DO - 10.1080/10298430802465624
M3 - Article
AN - SCOPUS:70449578505
SN - 1029-8436
VL - 11
SP - 25
EP - 35
JO - International Journal of Pavement Engineering
JF - International Journal of Pavement Engineering
IS - 1
ER -