Recent Advances in Cone Penetrometer Measurements (Software and Hardware) and Its Application to Liquefaction Susceptibility

by Kanthasamy K. Muraleetharan, Earth Technology Corp, Long Beach, United States,
Geoffrey R. Martin, Earth Technology Corp, Long Beach, United States,
Lucas K. Hekma, Earth Technology Corp, Long Beach, United States,



Document Type: Proceeding Paper

Part of: Recent Advances in Instrumentation, Data Acquisition and Testing in Soil Dynamics

Abstract:

Some of the recent advances made in Cone Penetration Test (CPT) data acquisition system and real time processing of CPT data are presented. A key component of the new CPT data acquisition system is a Programmable Gain Amplifier (PGA) based Analog to Digital (A/D) circuit board. The PGA based A/D board automatically adjusts its resolution according to the strength of the soil. A comparison between CPT data acquired using a PGA based A/D board and a non-PGA A/D board are presented and advantages of using a PGA based A/D board in soft soils are discussed. A comprehensive new software developed for the processing of CPT data is discussed. This software automatically processes the CPT data in the field and presents soil type and other geotechnical parameters based on established correlations. In addition, a methodology to assess liquefaction susceptibility of a site in the field using a companion software being developed is also presented.

Subject Headings: Penetration tests | Soil liquefaction | Soft soils | Computer software | Data collection | Computing in civil engineering | Soil properties

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