It is well known that the mechanical behaviour of pure sand is dependent on the internal soil structure, which can be affected by sample preparation methods. For fibre-reinforced sand (FRS), the sample preparation methods influence not only the internal structure of sand skeleton but also the distribution of fibre orientation and sand-fibre interaction. The effect of sample preparation methods on the mechanical behaviour of FRS has been investigated using comprehensive drained triaxial compression tests. The soil samples have been prepared by moist tamping (MT) and moist vibration (MV). There is a small difference in the stress-strain relationship of pure sand with different sample preparation methods. But the response of FRS is dramatically different. Under the same initial conditions of void ratio, confining pressure and fibre content, FRS prepared using the MV method shows 30–50% higher peak deviator stress and much less dilative response. A newly developed constitutive model is used to simulate the stress-strain relationship of FRS prepared using different methods.

众所周知，纯砂的机械性能取决于内部土壤结构，这可能会受到样品制备方法的影响。对于纤维增强砂（FRS），样品制备方法不仅影响砂骨架的内部结构，而且影响纤维取向的分布和砂纤维相互作用。使用全面的排水三轴压缩试验研究了样品制备方法对FRS力学性能的影响。土壤样品是通过湿夯（MT）和湿振动（MV）制备的。使用不同的样品制备方法，纯砂的应力-应变关系差异很小。但是FRS的响应截然不同。在相同的孔隙率，围压和纤维含量的初始条件下，使用MV方法制备的FRS显示出偏斜应力峰值高30％至50％，而扩张响应则低得多。使用新开发的本构模型来模拟使用不同方法制备的FRS的应力-应变关系。