The concept of anchored stress-dike was clarified based on the stress distributing law of compound anchors, and the effective thickness formula of anchored stress-dike was proposed. The reinforcement design method of cable spacing and non-stressed zone was explored. 3. 根据群锚应力分布规律,阐明锚固应力外墙的概念,提出锚固应力外墙有效厚度的计算公式,探讨锚索间距及无应力十字锥区的加固设计方法。