锚碇在深圳机场轨道交通枢纽基坑工程中的应用

以深圳机场轨道交通枢纽基坑工程为依托，分析了锚碇台阶形填方的特殊工程条件，采用极限平衡法推导了锚碇的极限抗拔力，并采用有限元法分析了锚碇的受力、变形特征，在此基础上提出了锚碇设计方案。该方案的成功应用，证明了锚碇设计是安全的、合理的。最后，通过分析实测资料，得出锚碇前土体顶部位移大，下部位移小，影响深度达到10 m以下的变形规律。

Application of Anchorage in Excavation Engineering for Rail Transit Hub of Shenzhen Airport

Taking the excavation engineering for rail transit hub of Shenzhen Airport as the background, the paper analyzed the special engineering conditions for benched fill of anchorage, then deduced the ultimate pullout capacity of anchorage by limit equilibrium method and studied the force and deformation characteristics thereof by finite element method, and on this basis, put forward the anchorage design scheme. The successful application of this scheme demonstrated that the anchorage design is safe and reasonable. At last, by analysis of the survey data, the deformation law of anchorage, when the displacement of soil mass ahead is large on the top and small on the bottom with the depth of impact more than 10.0m, is concluded.