摘要
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,从而为室内合理测定土基回弹模量值提供参考依据.
Subgrade Resilient modulus are important parameters of highway structure design. The actual subgrade resilient modulus is related with safety and economy of highway structure. Indoor tests are necessary because of disadvantages of outdoor tests. Based on elastic layer theory, theoretical modified coefficient of resilient modulus is put forward with FEM. After the results are verified with actual projects, it is shown that subgade resilient modulus by indoor bearing plate should be multiplied by coefficient 0.95, so as to provide references for testing subgrade resilient modulus indoor reasonably.
出处
《贵州科学》
2007年第B05期246-251,共6页
Guizhou Science
关键词
室内承载板法
土基
回弹模量
lab bearing plate test
soil base
resilient modulus
