通过改变直剪试验中土的垂直压力的大小和级数,得到不同的粘聚力和内摩擦角试验值,通过计算得出符合实际情况的试验方法。研究表明:在挡土墙设计中,要按照填土的高度来设计合理的试验方案,否则会造成设计错误。 By changing the size and series of the vertical pressure of soil in the direct shear test, different experimental values ​​of cohesion and internal friction angle are obtained, and the test method that accords with the actual situation is calculated. The research shows that in the design of retaining wall, it is necessary to design a reasonable test plan according to the height of fill, otherwise it will cause design errors.