中文摘要：

在普通双向土工格栅的节点处通过捆扎带连接加强塑料锚固片,使其成为拥有三维立体加筋效果的带加强锚固片土工格栅。通过室内土工格栅的拉拔试验,比较带加强锚固片土工格栅与普通土工格栅在与土体相互作用时对土体的加强效果并分析其规律。通过对试验得到的数据进行整理并分析,研究带加强锚固片土工格栅在不同变量条件下相对于普通土工格栅对拉拔力的影响情况。试验分析结果表明,随着法向应力的增大,带加强锚固片土工格栅承载的拉拔力随之增加。随着锚固片距离节点长度的增加,加强锚固片土工格栅承载的极限拉拔力效果减弱。根据试验结果以及理论分析,带加强锚固片土工格栅相比较于普通土工格栅筋土界面间似黏聚力和摩擦角均有了相对的提高。随法向应力的增加,极限拉拔力的主要占比由锚固片的端承阻抗力转变为筋土界面间的摩擦阻力。

英文摘要：

Strengthening anchor pieces were applied to a geogrid to form a biaxial geogrid with the anchor pieces that had three-dimensional reinforcement effect. Interaction characteristics of reinforcement and soil interface were investigated in this study using a pull-out experiment, and pull-out resistances of the reinforced geogrid in different conditions were examined by reorganizing and analyzing nine sets of test data. The results indicate that the pull-out resistance of a reinforced geogrid is greatly improved relative to the common geogrid. Strengthening effect is more obvious with larger pull-out normal stress, but it is weakened by increasing the spacing of anchor nodes. By our experimental results and theoretical analysis of anchor pieces strengthened geogrids, cohesion and friction angle between its reinforcement and soil are also increased. As pull-out normal stress increases, the interface friction gradually grows into the dominant factor in ultimate pull-out resistance.