It can get good effect through the measures of advancing the aggregate grading and increasing sand ratio and provide reference for similar engineering.
通过改善集料级配，适当增加砂率等措施来解决流沙问题能取得良好的效果，可为类似工程提供参考。
2
The paper briefly describes the problems which should be noticed in gradingsand-gravel cushion and cement stabilized sand-gravel base constructions, and the treatments for them.
简述了级配砂砾垫层与水泥稳定砂砾基层在公路施工中应注意的问题及处理方法。
3
The feasibility of using attle in ordinary concrete is studied. 50% sand replaced with attle, a dense-grading system is obtained with fly ash, sand, attle and stone.