Experimental Study on Creep Characteristics of Glass Fiber Grid under Low Temperature and Low Stress
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Abstract:
The reinforced material in the reinforced soil can show creep deformation under the long-term stable drawing force and the deformation increases with time. If the creep deformation oversteps the allowable value, then the reinforced soil structure would be damaged. In the cold regions of northern China, soil temperature is between 0℃and -20℃ in winter. Application of glass fiber grid under this condition needs to take into account the effects of low temperature on the creep characteristics of glass fiber grid. The creep tests of glass fiber grid were performed under different temperature of -20℃, -10℃, 0℃, and 20℃. The results showed that (1) the creep deformation of glass fiber grid under negative temperatures was lower than that under normal temperature; (2) under the same temperature, the creep deformation increased with the increasing of loading level; (3) under the same loading lever, the creep deformation decreased with the decreasing of temperature; and (4) the increasing rate of creep deformation with loading level under negative temperatures was lower than that under normal temperature (20℃), which was in accordance with the rule of that lower increasing rate of creep deformation accompanies with lower temperature.
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