Only considered creep behavior of geosynthetics in the design and construction of reinforced structures, not that the creep behavior of reinforced materials considered geosynthetics-sand interaction under different loading levels. A series of creep tests on a geogrid under different loading levels were carried out through a self-developed test device. The long-term creep characteristics of the geogrids under different loading levels were analyzed. The results showed that: Compared to sand constraint condition, under the same loading level, the creep rate under non-constraint condition is about 1.1 times. After the creep time over 400 h, the strain growth rate tends to be a constant value for sand constraint condition, which needs 700 h for non-constraint condition. Creep deformation mainly occurs near the pullout endpoint of the geogrid, and the deformation of each strain measurement zone is reduced from the tensile end to the fixed end of the geogrid.

中文翻译：

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不同荷载水平下考虑砂土相互作用的土工格栅蠕变特性研究

在加筋结构的设计和施工中只考虑了土工合成材料的蠕变行为，而不是考虑了不同荷载水平下土工合成材料-砂相互作用的加筋材料的蠕变行为。通过自主研发的试验装置，对土工格栅在不同荷载水平下进行了一系列蠕变试验。分析了土工格栅在不同荷载水平下的长期蠕变特性。结果表明：与砂约束条件相比，在相同的加载水平下，非约束条件下的蠕变速率约为1.1倍。蠕变时间超过 400 h 后，砂约束条件下应变增长速率趋于恒定值，非约束条件需要 700 h。蠕变变形主要发生在土工格栅拉拔端点附近，