胶新铁路施工期路堤水土流失特征

为探讨铁路路堤坡面水土流失特征，对施工期胶新铁路一段路堤进行了天然降雨现场观测，结果表明：路堤坡面的水土流失形式在特大暴雨时表现为浅沟侵蚀，但不影响路堤表面的稳定性；路堤坡面产生水土流失需要一定的雨量和雨强条件，雨强是引起坡面产流的关键因素；路堤通过改变沿线原来的径流途径引起二次水土流失，即通过路堤的渗流冲刷下游农田，及时修建导流排水沟可以预防二次水土流失。

Characteristics of Soil and Water Loss on Embankment Slope of Jiaozhou-Xinyi Railway

In order to know the characteristics of soil and water loss on the slope of railway embankment during construction, an investigation on Jiaozhou-Xinyi railway was conducted. The results indicate that the main type of soil and water loss on embankment slope in event of flood is ephemeral gully. Whereas, the ephemeral gullies do not influence the stability of embankment surface. Both great rainfall and rain intensity are conditions of soil and water loss, rain intensity is especially crucial. By changing the original runoff route, embankment can cause seepage which will scour cropland downstream. It is manifested that building drain in time can prevent seepage flow from directly scouring the land in the lower reach of the embankment.