盾构施工对邻近群桩基础影响的数值模拟研究

Numerical Investigation on the Behaviors of Adjacent Piles Foundation under Shield Tunneling Construction

邻近群桩基础的盾构施工是一种常见的工程问题。通过三维有限元模型分析并对比现场监测数据对盾构施工过程中距盾构机1/2D处群桩的沉降规律进行了研究,进一步结合有限元结果对弯矩和轴力规律进行探讨。结果表明:盾构施工过程中盾构外压力对邻近桩的影响较为明显。

Shield tunnel pass through adjacent piles foundation is a commonly encountered engineering problem. In this paper,finite element（ FE） models in three dimensions,validated through the comparison with field monitoring results were launched to address the settlement of the pile group which is1/2D distance to the shield machine during the construction process; furthermore,the bending moment and axial force were discussed based on the finite element results. The results indicate that the external pressure in the process of shied has a great influence on the adjacent piles foundation.