山东省引黄济青工程输水河寒亭段有19.3km为粉砂土河段,大部分为高填方和半挖半填。工程自运行以来,堤坡水土大量流失,水毁严重,给工程管理造成了较大困难,不但影响了工程面貌,而且危及了工程的安全运行。因此,对粉砂土堤坡保土固坡显得尤为重要。1 工程存在的问题及原因 粉砂土在当地称海底砂,含盐碱量高,无粘性,水土不易保持,植被不易生长,地表长期裸露。雨季,粉砂土达到饱和后,随水流失,形成大量雨淋坑沟,有的雨淋坑深1m,宽达3m。特别是高填方段,外坡斜长达9m,冲刷严重。旱季,粉砂土不保水,土粒处于松散状态,遇大 19.3km in the Han Ting section of Shuihuaihe River in Yellow River Diversion Project of Shandong Province is mostly silt-soil section, most of which are high-fill and half-dug semi-fill. Since the project was put into operation, a large amount of soil and water loss and serious water damage occurred in the embankment, which caused great difficulties in project management. It not only affected the appearance of the project, but also endangered the safe operation of the project. Therefore, silt soil embankment slopes slope protection is particularly important. 1 project problems and causes of silt in the local said sand, saline-alkali content, non-sticky, difficult to maintain water and soil, vegetation is not easy to grow, long-term exposed surface. In the rainy season, silt reaches saturation, with the loss of water, the formation of a large number of rain ditch, and some rain pit depth 1m, width 3m. Especially high-fill section, the outer slope of up to 9m oblique, serious erosion. Dry season, silt is not water, soil particles in a loose state, in case of large