输水隧洞近接沉箱桩施工的三维有限元分析

3-D FEM analysis of constructing tunnels adjacent to existing caisson pile

使用基于弹塑性增量理论的三维有限元方法,较细致地模拟了公路下输水隧洞近接沉箱桩施工的过程,并考虑了混凝土和注浆地层力学参数随龄期的变化,得出了一系列对设计和施工具有重要参考意义的结论。本文的研究对于类似接近桩基的暗涵工程,具有一定参考价值。

In this paper, the tunnels construction adjacent to existing pile foundation is studied. Two water diversion tunnels are embedded in soft soil under road.The construction process of tunnels adjacent to caisson piles is simulated with the 3 - D nonlinear finite element method in details, considering the materials properties change by time. The conclusions and suggestions are valuable for the engineering design,and worthful as references for the similar projects.