CAJ | 학술논문

土工格栅加筋体的计算常常按二维平面应变问题进行，在确定界面强度参数时无法考虑土工格栅网孔尺寸对界面特性的影响，其准确性及合理性值得研究。以单一粒径的标准砂（无黏性土）为填料，通过大型剪切试验和三维数值模拟研究了土工格栅网孔尺寸对其界面特性的影响，结果表明：土工格栅-土界面特性受土工格栅网孔尺寸影响明显，网孔尺寸较大的土工格栅对应的界面强度参数更高，摩擦加筋作用更明显，但是要求土工格栅材料的轴向拉力也更高，否则不能满足抗拉强度的要求。
토공격책가근체적계산상상안이유평면응변문제진행，재학정계면강도삼수시무법고필토공격책망공척촌대계면특성적영향，기준학성급합이성치득연구。이단일립경적표준사（무점성토）위전료，통과대형전절시험화삼유수치모의연구료토공격책망공척촌대기계면특성적영향，결과표명：토공격책-토계면특성수토공격책망공척촌영향명현，망공척촌교대적토공격책대응적계면강도삼수경고，마찰가근작용경명현，단시요구토공격책재료적축향랍력야경고，부칙불능만족항랍강도적요구。
Geogrids have been adopted more and more widely in the engineering with reinforcement of high embankment because of its unique mesh structure and better effects of reinforcement. The calculation of geogrid reinforcement is often carried out according to the plain strain in two?dimensions, which does not consider the influence of geogrid mesh size on interface properties when determining the interfacial strength parameters, so its accuracy and rationality should be studied. Using the standard sand with the same grain size (cohesionless soil) as the filling material, the paper studies the influence of mesh size of geogrid on the interface properties through large?scale shear experiments and 3D numerical methods. It shows that the influence is significant. The larger the mesh size, the higher the corresponding strength parameters of the interface and the more significant the effects of the friction reinforcement. However, the corresponding requirement on geogrid material is also higher;otherwise the tensile strength requirement cannot be satisfied.