The assessment of ground liquefaction can be conducted more economically and efficiently than with conventional methods.
The Piezo Drive Cone (PDC) is a ground investigation technology that enables the evaluation of soil liquefaction strength through in-situ testing by measuring pore water pressure in the ground using dynamic penetration tests. In PDC, not only the penetration resistance value Nd (equivalent N value) is obtained, but also the "residual pore water pressure ratio generated during impact" and the relationship between the residual pore water pressure ratio and the fine particle content ratio Fc are used to estimate the fine particle content ratio Fc for each impact, allowing for the evaluation of liquefaction strength based on the obtained Nd value and Fc. Compared to standard penetration tests, which can only calculate one point at a depth of 1 meter, continuous evaluation of soil heterogeneity is possible through automatic measurement for each impact. The application range where this method is particularly effective is in heterogeneous ground investigations of soft ground that forms interlayered soil in alluvial lowlands. 【Features】 - Easy installation even in narrow spaces - Analytical data can be obtained immediately - Lightweight and compact, easy to move - No wasteful countermeasure costs - Environmentally friendly with no mud water generated For more details, please contact us or download the catalog.
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basic information
【Features】 ○ Can investigate more locations at the same cost as boring surveys. ○ Conducts liquefaction surveys based on detailed investigation data, allowing for evaluations with fewer uncertainties (geological risks). ○ Provides a more detailed liquefaction assessment of the ground, properly defines the scope of liquefaction countermeasures, and enables budgeting with minimal changes during the construction phase. ○ Uses a dynamic penetration device, eliminating the need for reaction force. ○ Compact design with wheels for manual mobility. ○ Occupies approximately 30% of the space compared to boring surveys (the typical occupied area for boring surveys is about 20 square meters, while PDC occupies about 6 square meters or less). ● For more details, please contact us or download the catalog.
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Company information
The PDC Consortium is an organization established by companies participating in the theme "Demonstration and Dissemination of Dynamic Penetration Tests to Measure Pore Water Pressure" of the 2011 project of the National Association of Geological Survey Industries, aimed at promoting PDC to conduct liquefaction assessment of the ground more economically and efficiently than traditional methods. The goal of the PDC Consortium is to contribute to the reduction of future liquefaction damage by utilizing PDC to gain a comprehensive and detailed understanding of the ground's strength against liquefaction. Additionally, within the PDC Consortium, a committee of scholars has been established to conduct technical studies to promote and enhance the ground investigation methods using PDC as a new liquefaction survey method. Committee members include university professors and researchers from institutions such as the Public Works Research Institute and the Port and Airport Research Institute.
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