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中文摘要：
为了研究循环荷载作用下高速铁路花岗岩全风化物改良土路基的累积塑性变形特性，引入路基变形的弹塑性循环蠕变模型，进行了有限元分析并与现场试验实测值对比。研究结果表明：循环蠕变模型可以较好地模拟路基的累积塑性变形；在200万次的循环动载作用下，花岗岩全风化物改良土路基的累积塑性变形很小，所以，花岗岩全风化物经过改良以后可以用作高速铁路的路基填料，从而可以解决工程中常常遇到的弃方、借土、占地和生态、环保等方面的难题。
英文摘要：
In order to study the characteristics of accumulative plastic deformation of roadbed filled with completely weathered granite improved soil under cyclic loads, the elastic - plastic cyclic creep model of roadbed deformation was introduced, the results with the data of field test were analyzed and compared. The results show that the cyclic creep model can be used to simulate the accumulative plastic deformation of roadbed. The plastic deformation of roadbed filled with improved soil under 2 million times of the cyclic loads is small and completely weathered granite improved soil can be served as the filling of high - speed, railway roadbed.
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