摘要
利用三维非线性有限元方法模拟土压平衡式盾构推进过程中引起的地面沉降,研究了盾构覆土厚度、盾构外径、土压仓压力、盾尾空隙等因素变化对地面沉降的影响,并在此基础上提出了能够综合反映上述因素影响的盾构隧道地面沉降计算公式。通过与上海地铁4号线浦东南路站～南浦大桥站区间隧道盾构开挖的实际地面沉降数据的比较,验证了计算公式的合理性。
The ground surface settlements due to earth-pressure-balance shield tunneling was simulated using 3-D nonlinear finite element program. Those influence factors such as overlay soil depth, outside diameter of the tunnel, cabin earth pressure, and the tail voids were studied. A calculation formula was proposed base on the upper analysis, the comparison between the calculated and measured surface settlements in Pearl Line of Shanghai Metro from South Pudong station to Nanpu Bridge station proved the reasonability and credibility of the proposed.
出处
《铁道建筑技术》
2005年第1期32-35,共4页
Railway Construction Technology
