明挖隧道对高铁桥梁安全影响性分析

Analysis of Influence of Cut-and-Cover Tunnel on Settlement and Deformation of High-speed Railway Bridge

随着基础设施建设加速,明挖隧道穿越各建筑物不可避免。本文采用数值模拟方法,基于福厦铁路明挖隧道近距离侧穿铁路桥梁,研究明挖隧道穿越桥桩时,地表和桥梁的变形、内力变化规律,并分析了加固措施的合理性,结果表明:采取的加固措施后,地层和桥桩变形均满足要求,桥桩的附加弯矩较小,结构强度满足要求,验证了加固措施的有效性。

With the acceleration of infrastructure construction,it is unavoidable that cut-and-cover tunnels pass through various buildings.In this paper,the numerical simulation method is used to study the change law of the surface and bridge deformation and internal force when the open-cut tunnel of Fuzhou-Xiamen Railway passes through the bridge pile at a short distance,and the rationality of the reinforcement measures is analyzed.The results show that:After the reinforcement measures are taken,the deformation of the stratum and the bridge piles meet the requirements,the additional bending moment of the bridge piles is small,and the structural strength meets the requirements,which verifies the effectiveness of the reinforcement measures.