通过对粉煤灰的物理化学及土力学特性进行研究，发现粉煤灰的高液限及毛细吸水现象对地下地上水丰富的铁路路基可能产生病害，本文采取上下封闭、两侧包边的隔水断面填筑结构形式，将粉煤灰毛细吸水现象对路基质量的不利影响消除；同时介绍了严寒、液化地基上粉煤灰铁路路堤填筑方法、施工工艺以及控制要点，对同类工程有借鉴意义。%Through studying the physicochemical characteristic and soil mechanics characteristic of coal ash, it is founded that the high liquid limit and capillary water absorption of coal ash may cause disease to the railway foundation with rich ground or underground water. This paper adopts water exclusion section structure to remove the adverse effect of the capillary water absorption of coal ash on foundation quality. It also introduces the coal ash railway foundation filling method in severe cold area and liquefied foundation and the construction technology and control points, which can provide reference for similar projects.
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