A continuous intrusion miniature cone penetration test system for transportation applications : final report.
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1999-01-01
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Alternative Title:A continuous intrusion miniature cone penetration test system for transportation applications.
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Abstract:The electronic cone penetrometer is a popular in situ investigation tool for site characterization. This research report describes the application of this proven concept of the cone penetration test (CPT) to highway design and construction control by miniaturization. A miniature cone penetrometer with a projected cone area of 2 cm2 has been developed and implemented in a Continuous lntrusion Miniature Cone penetration Test system (CIMCPT). This novel device may be used for rapid, accurate and economical characterization of sites and to determine engineering soil parameters needed in the design of pavements, embankments, and earth structures. The miniature cone penetration test (MCPT) and the miniature piezocone penetration test IMPCPT) give finer details compared to the standard 10 cm2 cross-sectional area "reference" cone penetrometer. This makes CIMCPT attractive for subgrade characterization, quality control assessment, compaction control of embankments, and assessment of ground improvement effectiveness for transportation infrastructure. In situ calibration of the CIMCPT system was conducted at Highland Road site in Baton Rouge, Louisiana; and also at two of the National Geotechnical Experimentation Sites (NGES): University of Houston, and the Texas A & M University. CIMCPT penetration profiles were compared ith those obtained using the standard cone penetrometer. The average tip resistance of the CIMCPT was 11 percent higher than that of the reference CPT. The average CIMCPT sleeve friction was lower than that of the reference CPT by 1 1 percent. These results compare well with previous research.
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