穿堤管道工程可能出现抗浮破坏和堤防沉降变形, 如何确立其抗浮埋深与极限沉降是设计中必须重视的关键 问题。以某穿堤管道工程为例, 综合考虑上覆土层强度、 河道行洪冲刷、 地震荷载等因素的影响, 提出基于有限元的 优化算法求得更加合乎工程实际情况的抗浮埋深, 并综合考虑地层损失和地表沉降等各种因素, 试算求得管道极限 收缩率来模拟地层损失, 最终得出结构所允许的垂直位移极限沉降值, 为工程设计、 后续沉降监控提供参考。

Submerged pipeline project may encounter anti 2uplift break and embankment settlement and deformation. How to de 2 termine the anti 2uplift buried depth and ultimate settlement in the design is a key problem to be solved to ensure project safety. In this paper, a cross2river submerged pipeline was taken as an example, an optimal algorithm based on finite element method was proposed to obtain a more practical and reasonable anti 2uplift buried depth in consideration of the overlying soil layer inten2 sity, flood passage and erosion, and earthquake load. In addition, ground loss was simulated based on the ultimate shrinkage of pipeline, and the vertical ultimate settlement and displacement were obtained eventually. The results can provide the basis for the project design and subsequent settlement monitoring.