中文摘要：

运用FLAC3D软件对沈阳某深基坑开挖和支护过程进行数值分析与计算，重点分析开挖过程中桩顶位移、桩身位移和弯矩的变化，并将现场实测值与软件模拟的计算值进行对比分析，在此基础上改变锚杆倾角与桩入土深度等支护设计，探讨这些因素对基坑变形的影响．研究结果表明：模拟结果与实测值基本一致，数值模拟结果可信；桩身最大水平位移和最大弯矩均出现在桩身大约8m的位置，并不是在支护桩顶部；设计时桩的入土深度可取4～6m，锚杆倾角可取5°～30°．

英文摘要：

The simulation software of FLAC3D was applied to calculate and analyze the actual pile-anchor supporting structure of the deep foundation pit in Shenyang. This research mainly focused on the pile top displacement of piles, horizontal displacement of pile and internal forces in the excavation process. Furthermore, field-measured values and the calculation results by simulation software were compared and analyzed. And on this basis, change the dip angle of anchor and embedded depth of the supporting design and explore these factors on the influence of pit deformation. The results prove that the simulation value and the measured value is basically the same, and the numerical simulation result is reliable. The maximum value of horizontal displacement and bending moment of pile appear in the position of the pile body about 8m rather than the top in the range of the supporting pile; design of the embedded depth of the pile desirable 4-6 m, and the dip angle of anchor is appropriate when it ranges from 5°～30°.