一、前言加筋土系由填土和拉筋所组成的复合材料,其强度特性不同于无筋土。加筋土中较为理想的填料为砂性土。因它不仅可以提供较大的筋、土之间的表观摩擦系数,而且可以充分利用砂土良好的排水性能。但是,在实际工程中有时缺乏合适的砂性土,如果坚持使用砂性土作填料,势必造成工程费用的增加,并限制了加筋土的使用,使其优越 I. INTRODUCTION Reinforced soil consists of composite material filled with soil and stretching, whose strength characteristics are different from those without soil. Reinforced soil is the ideal filler for sandy soil. Because it can not only provide a larger tendon, the apparent coefficient of friction between the soil, and can make full use of sand good drainage performance. However, in practical projects, sometimes, there is a lack of proper sandy soil. Insisting on the use of sandy soil as filler will inevitably result in an increase in construction costs and will limit the use of reinforced soil to make it superior