无根护壁桩支护三维有限元分析研究

传统的岩质基坑支护存在造价高、工期长、安全性低等缺点。无根护壁桩支护方法改善了上述缺点，并且已经成功应用于工程实践当中。通过详细介绍无根桩的结构和利用 ABAQUS 软件建立考虑支护结构与土体共同作用的无根护壁桩三维有限元模型，对基坑整体稳定性、各构件受力特征及变形特征进行了分析。分析得出，基坑满足整体稳定性要求，各支护构件均满足强度要求，基坑变形也满足要求，所以推广无根桩支护在岩质深基坑中的应用将具有积极意义。

3 - D Finite Element Simulation of Rootless Pile

The traditional rock-excavations retaining has disadvantages of high costs ,long construction duration ,low se-curity ,et al .However the rootless pile retaining technology instead was successfully applied to the practice .By introduc-ing the structures of the rootless pile in detail and building the 3 - D finite element models considering the combined ef-fects of the soil – structure inaction ,the overall stability of the excavation ,the internal force of the retaining components and the excavation deformation for each analysis step were analyzed .The results indicated that the stability of the excava-tion ,the strength of each retaining components and pit deformation can meet all the requirements .It is significant to pro-mote rootless pile in rock-pit practice .