中文摘要：

正交水平一竖向（H-V）加筋是一种新型的土工加筋技术，在H-V加筋土中除了有传统的水平筋条外，还在水平筋条上设置了竖向齿筋。结合己完成的加筋土三轴试验，采用基于离散元理论的颗粒流软件（PFC^2D）对试验进行了仿真模拟，较好地拟合了H-V加筋砂土三轴试验的应力一应变曲线，并通过观测颗粒的受力情况分析了H-V加筋砂土的受力机理。通过引入颗粒流理论，对H-V加筋砂土试样的剪切带形成进行了细观数值模拟，揭示了H-V加筋土中剪切带产生、扩展的渐进破坏规律。

英文摘要：

Soil reinforced with horizontal-vertical （H-V） inclusions.orthogonally is a new concept of reinforced soil. In the H-V reinforced soil, besides the conventional horizontal inclusions, vertical reinforced elements are also placed on the horizontal ones. A series of laboratory triaxial compression tests on sand specimens reinforced with H-V orthogonal inclusions were carried out. Particle flow code （PFC）, based on the discrete element method （DEM）, was introduced to simulate the triaxial tests The macro stress-strain relation of the sand specimens reinforced with H-V inclusions was reproduced and verified by PFC^2D model, and the fundamental mechanism was also analyzed. From the numerical simulation of PFC^2D, the occurrence and propagation of shear band were studied and some useful conclusions were drawn.