The load transfer behavior of grouted anchors is time-dependent under long-term (creep) load. This study aims at investigating the time-dependent behavior of grouted anchors in laterite by both physical model test and theoretical simulation. A laboratory creep pullout model test of full-length-bond grouted anchor in laterite was carried out using a special developed apparatus. The creep pullout load–displacement response at anchor head and time history curves of axial strain were tested and presented. The creep behavior on the grout - soil interface was simulated using Merchant rheological model in theoretical simulation. By comparing the experimental data with predictions, the applicability of the proposed theoretical method was validated, and the time-dependent load transfer behavior of grouted anchors was discussed. The impacts of five model parameters on the time-dependent pullout response were further analyzed by parametric studies. It revealed that the tensile force distribution tends to be linear, and the shear stress distribution towards uniformity as time elapsed. Additionally, the time-dependent load transfer behavior for grouted anchors is influenced by the above parameters in various levels. This work provides insights into understandings of time-dependent behavior, and facilitates the service life design practice for grouted anchors embedded in laterite.

在长期（蠕变）荷载下，注浆锚的荷载传递行为与时间有关。本研究旨在通过物理模型试验和理论模拟研究红土中注浆锚的时变行为。使用专门研发的设备对红土中的全长粘结灌浆锚进行了实验室蠕变拉拔模型测试。测试并给出了锚头的蠕变拉拔载荷-位移响应和轴向应变的时程曲线。在理论模拟中使用Merchant流变模型模拟了水泥浆-土壤界面上的蠕变行为。通过将实验数据与预测值进行比较，验证了所提理论方法的适用性，并讨论了随时间变化的灌浆锚固荷载传递行为。通过参数研究进一步分析了五个模型参数对随时间变化的拔出响应的影响。结果表明，拉力分布趋于线性，并且随着时间的流逝，剪切应力分布趋于均匀。另外，灌浆锚的时间相关的荷载传递行为在各个级别上受上述参数的影响。这项工作提供了对与时间相关行为的理解的见解，并促进了埋在红土中的灌浆锚的使用寿命设计实践。灌浆锚的随时间变化的荷载传递行为在各个层面上受到上述参数的影响。这项工作提供了对与时间相关行为的理解的见解，并促进了埋在红土中的灌浆锚的使用寿命设计实践。灌浆锚的随时间变化的荷载传递行为在各个层面上受到上述参数的影响。这项工作提供了对与时间相关行为的理解的见解，并促进了埋在红土中的灌浆锚的使用寿命设计实践。