Abstract: Two typical high-strength geogrids are selected to do the indoor creep test without any constraint condition.One of them is applied to practical roadbed engineering,where creep observation is kept for a continuous one year.The result of test shows that creep rate under unconfined conditions is almost 2 times of that under confined conditions,if the high-strength geogrids are approximately under load level.At last,some suggestions on the range of creep strength reduction coefficient adoption for high-strength geogrids are proposed.

Key words: creep, test, high-strength geogrids

摘要： 选择了2种有代表性的高强土工格栅,进行了室内无侧限蠕变试验。将其中一种应用于路基实体工程中并进行了持续1 a的蠕变观测。试验研究表明,高强土工格栅在近似荷载水平作用下,无侧限条件时的蠕变速率约为侧限条件时的2倍左右。根据试验结果,建议了高强土工格栅的蠕变强度折减系数取值范围。

关键词: 蠕变, 试验, 高强土工格栅