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填砂路基日益受到重视,但因其填料及顶封层、路堤边坡防护等细部构造的特殊性,在设计时需要谨慎考虑。结合国内既有高速公路填砂路基工程实例,阐述填砂路基填料的特殊性,对比填砂路基与粉煤灰路堤、沙漠风积沙路基、砂料堆积而成的堤坝、堆场等的差异,重点就砂料选择、路堤边坡稳定性设计、路堤边坡防护设计、顶封层设计与防排水设计等若干关键问题提出自己的看法。填砂路基是南方水网地区解决高速公路优质路堤填料匮乏的有效技术途径之一,需扬长避短,科学合理地开展填砂路基设计。
Filling sand embankment is paid more and more attention, but due to its packing and top seal, embankment slope protection and other details of the structure of the particular need to be carefully considered in the design. Combining with the existing engineering examples of filling sand-filled subgrade in expressway in our country, this paper expounds the particularity of filler in filled sand-filled roadbed and contrasts the difference between embankment filled with sand and sand, , Focusing on a number of key issues such as sand material selection, embankment slope stability design, embankment slope protection design, top seal design and drainage design, and put forward their own views. Filling sand embankment is one of the effective technical ways to solve the shortage of high-quality embankments in expressways in the southern water network area. It is necessary to avoid weaknesses and carry out the design of filled sand embankment in a scientific and reasonable way.