由于常规蠕变试验持续时间长，且对试验环境的温度、湿度等条件具有严格要求，因此常规蠕变试验方法耗时长、费用高;同时常规蠕变试验不能预测设计使用年限内的蠕变特性，为此提出了加速蠕变试验的短期时温叠加法。运用短期时温叠加法原理，通过利用室内三头电子蠕变试验机，对高密度聚乙烯(HDPE)土工格栅进行了10%，20%，30%荷载水平下3组短期蠕变试验，预测了该土工格栅在低荷载水平下的长期蠕变特性。结果表明:土工格栅在10%，20%，30%低载荷水平下的长期蠕变应变值较低，其中在10%载荷水平下的长期(10⁶ h)应变值维持在2%以内;短期时温叠加法可以用相对更短的时间来预测土工格栅的长期蠕变应变及刚度值。该研究可为工程实际应用提供依据。

Generally it takes a long period of time to complete conventional creep tests on geosynthetic materials. The test environment such as temperature and humidity should also be exactly controlled,which makes such tests very expensive and time consuming. Moreover, conventional creep test cannot predict the creep characteristics in design life. In view of this, the accelerated creep test method of short-term time-temperature superposition has been proposed.In this article, according to the principle of short-term time-temperature superposition,three groups of short-term creep tests of high-density polyethylene(HDPE) geogrids at 10%,20% and 30% load levels were conducted by three-axis electronic creep testing machine. Through the indoor creep tests,the long-term creep characteristics of the HDPE geogrids at each small load level were predicted. Results show that the long-term creep strain of the geogrids at 10%,20% and 30% load levels were low and the values at 10% load level maintained within 2%;the short-term time-temperature superposition principle takes relatively short time to predict the long-term creep strain and stiffness values of HDPE geogrids. This study could be used as reference for engineering application.