440 4TH CAN. PERMAFROST CONF. (1982) Influence of repeated loading on the behaviour of frozen silty clay
The results of an experimental study investigating the effects of dynamic loading on the shear strength of frozen silty clay are presented. Specimens were tested at temperatures of- 1,- 2, and- 3°C and under a constant confining pressure of 200 kPa. The mechanical behaviour of the frozen soil subjec...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.540.5089 http://pubs.aina.ucalgary.ca/cpc/CPC4-440.pdf |
| Summary: | The results of an experimental study investigating the effects of dynamic loading on the shear strength of frozen silty clay are presented. Specimens were tested at temperatures of- 1,- 2, and- 3°C and under a constant confining pressure of 200 kPa. The mechanical behaviour of the frozen soil subjected to repeated loading is compared with the behaviour of the same frozen soil without the repeated loading history. It was found that the shear strength of the frozen sample subjected to repeated loading decreased by about six per cent at temperatures near- 1 OC but showed no difference at lower temperatures, i.e.- 2 or- 3°C. The deformation modulus of the frozen soil increased when subjected to repeated loading. The increase was about 200 per cent at- l°C and 75 per cent at-3OC for the soil tested. Cet article presente les rksultats d'une etude exptrimentale des effets d'une charge dynamique sur la resistance au cisaillement d'argiles limoneuses gelies. On a soumis des Cchantillons a des tempera-tures de- 1,- 2, et- 3"C, et a une pression lithostatique constante de 200 kPa. On compare le com-portement mtcanique du sol gele sous I'effet d'une charge rCpCtCe au comportement de ce m&me sol non soumis a cet effort rkpetk. On a constate que la resistance au cisaillement de I'tprouvette gel & sou-mise a une charge rCp6tCe diminuait d'environ 6 pour cent aux temperatures proches de- 1 "C, mais ne variait pas aux temperatures plus basses, comme- 2 ou- 3°C. Le module de deformation du geli-sol a augmente en presence d'une charge ripetee. L'augmentation ttait d'environ 200 pour cent a- 1°C et de 75 pour cent a 3'C pour le sol testC. Proc. 4th Can. Permafrost Conf. (1982) |
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