土基回弹模量是路面设计的重要参数,实验室内测定土基回弹模量的方法为重复荷载三轴试验,野外测试的方法有承载板、动态锥等方法,上述方法操作起来都比较复杂。利用FWD(落锤式弯沉仪)测试土基计算弹性模量,再用国内常用的野外承载板试验测定土基回弹模量,分析FWD弹性模量和回弹模量之间的相关性,研究FWD直接预测土基回弹模量的可行性。结果表明该方法具有一定的可行性。 The modulus of elasticity of soil foundation is an important parameter of pavement design. The method of testing the modulus of elasticity of soil foundation in laboratory is the repeated load triaxial test. The methods of field test include loading plate and dynamic cone method. quite complicated. The elastic modulus of soils was measured by FWD (drop-weight deflection), and then the modulus of elasticity of soil-subgrade was measured by the commonly used test of field carrying board in China. The correlation between the modulus of elasticity of FWD and the modulus of elasticity was analyzed , The feasibility of using FWD to directly predict the rebound modulus of soil foundation was studied. The results show that the method has some feasibility.