摘要
针对砂土湿化变形计算中N obari法和单线法的不足,采用初应力增量有限元的分析方法,并编制相应的计算程序,对某高速公路路基砂土三轴试验得到的Duncan-Chuang模型参数进行计算分析。分析结果表明,该高速公路砂土路基在长期浸水和车辆荷载作用下,将发生一些附加沉降变形。虽然沉降变形不大,对柔性路面结构的影响较小,但仍然需要引起公路养护部门的重视。
Since there are some shortages in calculating the wetting deformation of sand with the Nobari method and the Single-Line method, the initial stress increment FEM is put forward in this paper and the corresponding program is developed. With the parameters of Duncan-Chang model samples obtained from the triaxial test of sand of an expressway, analyses are executed. The results show that if the sandy roadbed is saturated for long and has vehicles on it, it will evolve some additional wetting settlement. Although the settlement is not enormous and will not destroy the roadbed and the flexibility pavement, it is also a key factor for highway maintenance.
出处
《公路》
北大核心
2006年第1期58-62,共5页
Highway
基金
国家自然科学研究基金资助项目(编号:50378073)
关键词
砂土路基
湿化变形
初应力增量有限元
sandy roadbed
wetting deformation
initial stress increment FEM
