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土基回弹模量是路面结构设计中一个重要的参数,能否选用合乎实际的土基回弹模量直接关系到路面结构的安全性和经济性。由于野外承载板法费时、费力,且测点位置的选取以及测点多寡对回弹模量的影响,室内试验是一种不可缺少的方法。以弹性层状体系理论为基础,对室内承载板法测定土基回弹模量进行了理论修正,利用有限元程序求出修正系数,并通过实例工程进行验证,结果表明室内承载板测定土基回弹模量应乘以0.95这个修正系数,为室内合理测定土基回弹模量值提供参考依据。
The modulus of elasticity of soil foundation is an important parameter in the pavement structure design. Whether the resilience modulus of earth foundation is practical or not is directly related to the safety and economy of pavement structure. Due to the time-consuming and labor-intensive load-carrying method in the field, the indoor test is an indispensable method because of the location of measurement points and the influence of measuring points on the elastic modulus. Based on the theory of elastic layered system, the theoretical calculation of the modulus of elasticity of the soil bed by the method of indoor bearing plate is carried out. The correction coefficient is obtained by finite element program and verified by example engineering. The results show that the indoor bearing plate The modulus of elasticity should be multiplied by the correction coefficient of 0.95 to provide a reference for the reasonable determination of the modulus of resilience of the soil in the room.