Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Characterization of Sensitive Marine Clays by Using Cone and Ball Penetrometers: Example of Clays in Eastern Canada
Abstract Soundings made by using the standard penetration test in sensitive marine clay in Ottawa (Canada) have been problematic. Negative readings have been recorded. The incorrect estimation of the engineering characteristics of Ottawa clays has been noted. The effect of temperature on the penetrometer load cell output is suspected as the reason for the negative drift in soundings and erroneous estimations of engineering characteristics. Also, focused research is needed to verify existing correlations and empirical factors between the cone penetration test and engineering characteristics of Ottawa clays. These are the reasons for carrying out this research work. Temperature effects have become a significant factor in countries with radical temperature changes, such as Canada. Three types of penetrometer tips have been used at the Canadian Geotechnical Research Site No. 1. The tips used are a 36 mm cone, 40 mm ball, and 113 mm ball. Nilcon field vane testing has also been carried out in the site to determine the undrained shear strength and sensitivity (the ratio of the initial undrained shear strength to the remolded undrained shear strength) from the penetrometer soundings. Undisturbed samples are collected to obtain the engineering characteristics by laboratory testing. Laboratory testing on penetrometer equipment is performed to verify the effects of temperature on the soundings. It is found that temperature changes affect the penetrometer soundings. Temperature effects can cause drifting as indicated by negative tip stress or sleeve friction in soft or low resistance clays. Therefore, temperature effects may increase the errors in the estimation of the engineering characteristics of Ottawa clays. It has also been found that correlations may or may not apply well to Ottawa sensitive marine clay. Temperature corrections could be applied to the penetrometer soundings. From this research, correlations and empirical factors between penetrometers and engineering characteristics are verified for Ottawa sensitive marine clays.
Characterization of Sensitive Marine Clays by Using Cone and Ball Penetrometers: Example of Clays in Eastern Canada
Abstract Soundings made by using the standard penetration test in sensitive marine clay in Ottawa (Canada) have been problematic. Negative readings have been recorded. The incorrect estimation of the engineering characteristics of Ottawa clays has been noted. The effect of temperature on the penetrometer load cell output is suspected as the reason for the negative drift in soundings and erroneous estimations of engineering characteristics. Also, focused research is needed to verify existing correlations and empirical factors between the cone penetration test and engineering characteristics of Ottawa clays. These are the reasons for carrying out this research work. Temperature effects have become a significant factor in countries with radical temperature changes, such as Canada. Three types of penetrometer tips have been used at the Canadian Geotechnical Research Site No. 1. The tips used are a 36 mm cone, 40 mm ball, and 113 mm ball. Nilcon field vane testing has also been carried out in the site to determine the undrained shear strength and sensitivity (the ratio of the initial undrained shear strength to the remolded undrained shear strength) from the penetrometer soundings. Undisturbed samples are collected to obtain the engineering characteristics by laboratory testing. Laboratory testing on penetrometer equipment is performed to verify the effects of temperature on the soundings. It is found that temperature changes affect the penetrometer soundings. Temperature effects can cause drifting as indicated by negative tip stress or sleeve friction in soft or low resistance clays. Therefore, temperature effects may increase the errors in the estimation of the engineering characteristics of Ottawa clays. It has also been found that correlations may or may not apply well to Ottawa sensitive marine clay. Temperature corrections could be applied to the penetrometer soundings. From this research, correlations and empirical factors between penetrometers and engineering characteristics are verified for Ottawa sensitive marine clays.
Characterization of Sensitive Marine Clays by Using Cone and Ball Penetrometers: Example of Clays in Eastern Canada
Nader, Athir (Autor:in) / Fall, Mamadou (Autor:in) / Hache, Raymond (Autor:in)
2015
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
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