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通过对比分析碎石土加筋前后高压大三轴饱和固结排水试验结果 ,研究碎石土加筋的抗剪强度特性。结果表明 :加筋碎石土复合体的应力 -应变 -体变关系仍然表现出不加筋碎石土的基本特性 ,加筋后的应力 -应变 -体变曲线比不加筋前显著提高 ,其本构关系可用邓肯 -张双曲线模型来描述。不论加筋与否 ,碎石土的加卸荷循环曲线基本都呈相互平行的直线。加筋增强了碎石土抵抗变形和破坏的能力 ,碎石土加筋的效果可以显著提高凝聚力 ,但对其内摩擦角影响很小。颗粒越粗硬 ,对提高强度、减小变形越有利。
By comparing the results of high-pressure triaxial saturated consolidation drainage tests before and after gravel soil reinforcement, the shear strength characteristics of gravel soil reinforcement were studied. The results show that the stress-strain-volume relationship of the reinforced gravel-soil composite still shows the basic characteristics of the non-reinforced gravel soil, and the stress-strain- Its constitutive relation can be described by Duncan-Chang hyperbola model. Irrespective of the reinforcement or not, the loading-unloading cycle curves of gravelly soil are almost parallel to each other. Reinforcing enhances the ability of crushed stone to resist deformation and damage. The reinforced effect of crushed stone can significantly improve the cohesion but has little effect on the internal friction angle. The harder the particles are, the better for increasing the strength and reducing the deformation.