Abstract:Based on the creep experiments for CE131 geonet and SDL25 geogrids,under long-term load and different load levels,the creep characteristic is studied. Ten samples are made,including six samples of CE131 geonet and four models of SDL25 geogrids in the creep test. The test two CE131 geogrids samples and one SDL25 geogrids model are broken by the load in the clamping apparatus,and should not be counted according to standards. The other seven samples are all normal. The load levels of CE131 geonet are 70%(No.1),60%(No.2),40%(No.3),30%(No.4);and the load levels of SDL25 geogrids are 20%(No.1),30%(No.2),40%(No.3). CE131 geonet is broken under the load level No.1 after 1 728 hours,under the load level No.2 after 2 424 hours,under the load level No.3 after 5 304 hours;but for the sample of CE131 geonet,creep takes place no longer than 8 664 hours. 897 test data of CE131 geonet are gotten. For SDL25 geogrids samples,creep happens no longer under the load levels No.1 and No.2 after 5 928 hours;SDL25 model is broken under the load level No.3 after 13 271 hours. 783 test data of SDL25 geogrids are gotten. The test results show that the long-term strengths of CE131 geonet and SDL25 geogrids are 30%–40% of ultimate tensile strength. It has an important reference value for prestrain reinforcement engineering.