Shearing Rate Effects on Research Centre for Soft Soils (Recess) Clay Using Cone Penetration Test (CPT)

Abstract:

A wide range of industrial applications, on land and offshore, require the solution of time domain problems and an associated understanding of rate effects in clay soils. In recent decades many researchers have examined the correlation between shear strength of soils and variation of shear strain rate and it is generally accepted that the strength increases by 1-5% for each order of magnitude increase in shear strain rate. This paper discusses the effects of penetration rate on the penetration resistance (q_c) by using cone penetration test (CPT) test setup. The research had been conducted at RECESS and cone penetration test were used in three selected range of rate which were 0.5 cm/s, 1cm/s and 5cm/s. In addition, Mackintosh probe testhad been considered as comparison with CPT test for the unconfined compressive strength. The result shows different penetration rate influenced the soil shear strength. For the slowest rate (0.5 cm/s), the shear strength was approximately 0.15% less compared to the standard rate (2 cm/s). However, for the highest rate (5 cm/s), the shear strength was 0.22% more than the reference rate (0.5 cm/s). In conclusion, it is suggested that the RECESS clay soil influenced by the rate effect and in agreement with previous research findings.

• Periodical: Applied Mechanics and Materials (Volumes 773-774)
• Pages: 1555-1559
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.773-774.1555
• Online since: July 2015
• Authors: Azranasmarazizi Ayob*, Nor Azizi Yusoff, I. Bakar, Nur Abidah Azhar, Ameer Nazrin Abd Aziz
• Keywords: CPT, Keyword: Speed of Penetrations, Mackintosh Probe, Rate Effect, Shear Strength

References

[1] R. Yilmaz, Advances in Cone Penetrometer Technology, (2013).

[2] A. -L. T. Adrian-Traian Iliesi, Use of Cone Penetration Test and Cone Penetration Test with Porewater Pressure Measurement for Difficult Soil Profiling, (2012).

[3] M. B. Jaksa, W. S. An Improved Technique for Evaluating the CPT Friction Ratio, (2000).

[4] M. P. Kwang Kyun Kim, Interpretation of Cone Penetration tests in Cohesive Soils. Technology Transfer and Project Implementation Information, (2006).

[5] M. S. Trevisan, Influence of rate of penetration on CPT tip resistance in standard CPT and in CPTWD (CPT while drilling). 2nd International Symposium on Cone Penetration Testing, (2010).

DOI: 10.1201/9780429505980

[6] Jr., J. G. Tom Rate and State Effects on Cavity Expansion in a Modified Cam-Clay Medium Using FLAC, (2010).

[7] Kenneth A. Sudduth, J. W. Evaluation of A Soil Conductivity Sensing Penetrometer. An ASAE Meeting Presentation, (2000).

[8] D. K. Kim, Effect of Penetration Rate and Filter Location on Piezocone Test Results. 273-279, (2004).

[9] M. F. Shin Fun Chung, Effect of Penetration Rate on Penetrometer Resistance in Clay, (2006).

[10] B. N. Rikke Poulsen, Field Cone Penetration Tests with Various Penetration Rates – Test Results, (2011).

[11] José R. M. S. Oliveira, M. S., & Almeida, a. M. Influence of Penetration Rate on Penetrometer Resistance. American Society of Civil Engineers, (2011).

[12] K. Kim, Prezzi, M., Salgado, R., & Lee, A. W. Effect of Penetration Rate on Cone Penetration Resistance In Saturated Clayey Soils. Journal of Geotechnical And Geoenvironmental Engineering © Asce / August 2008, 1142-1153.

DOI: 10.1061/(asce)1090-0241(2008)134:8(1142)