摘   要：复合型土钉墙可应用于含水丰富的粉细砂、砂卵石地层，亦可应用于厚度小于4m、无临时自稳能力的淤泥等饱和软弱地层，并可兼作挡水结构。复合型土钉墙中的帷幕体除了起着挡水、载水作用外，另外一个重要作用是固化饱和软弱地层，在支护工作面形成一道“屏障”，保证支护工作面不出现流沙或淤泥流动等地层损失现象。结合某深基坑工程案例，介绍了土钉支护技术的具体应用情况。

Abstract: Composite soil-nailing wall can be applied in water-rich fine sand stratum、cobble and sand stratum, and can also be used in soft soil layer which is less than 4m thickness, non-provisional self-stability silt and other saturated soft soil layers, and it can also be applied to water-retaining structure. Curtains of composite soil-nailing wall not only have the role of water-retaining and water-loading, but also have the role of curing saturated soft soil layer, which can form a barrier in supporting working face to ensure not appearing layer lose phenomenon such as shifting sand or flowing silt. Combining with a deep foundation pit project, the specific application situations of soil-nailing supporting technique are introduced.