与传统土工格栅相比,3D打印土工格栅技术可以使用生物降解塑料进行打印,实现废物的二次利用,环保的同时支持个性化定制.通过室内拉拔试验和图像分析技术,研究不同的网孔形状、加强节点高度和加强节点布置方式对3D打印土工格栅拉拔性能的影响,分析了不同土工格栅-土界面剪切性能和界面土颗粒运移规律等.研究结果表明:不同节点高度下的土工格栅-土界面最大拉拔力和剪切带范围随着节点高度的增加而增大;当节点高度相同时,双侧节点布置方式下的最大拉拔力和剪切带大于单侧节点布置下的;不同网孔形状下格栅最大拉拔力从大到小依次为四向、三向和双向土工格栅,但剪切带范围与之相反.该研究为3D打印土工格栅的结构优化提供了一定的理论依据.
Compared with traditional geogrids, 3D-printed geogrid technology can be printed using biointerpretive plastics to achieve waste utilization, which is environmentally friendly and can also be personalized. Through indoor pullout tests and image analysis technology, the influence of different mesh shapes, reinforcement node heights, and node arrangements on the pullout performance of 3D-printed geogrids was studied, and the shear zones of different geogrid-soil interfaces and interfacial soil particle transport laws were analyzed. The results show that the maximum pullout force and range of the shear zone of ageogrid-soil interface increased with the node height. When the node heights were the same, the maximum pullout force and shear zone under the bilateral node arrangement were greater than those under the unilateral node arrangement. The maximum pullout forces of geogrids with different mesh shapes were in descending order: quadaxial, triaxial, and biaxial geogrids. However, the order for the shear zones was the opposite. This study provides a theoretical basis for the structural optimization of 3D-printed geogrids.
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