桩板结构下穿高速铁路工程的设计分析

Design Analysis of Pile-board Slab Structure Pass Through High Speed Railway

以茶坊路下穿金甬铁路新昌江特大桥工程为背景,阐述了为何选择桩板结构下穿,并对桩板结构进行建模分析,模拟其在施工过程和后期运营中对高速铁路桥梁墩身附加位移变形和桩基附加力变化的影响,得出桩板结构下穿对高速铁路桥梁影响可控的结论,并对施工过程中高速铁路桥梁的监测要求和相关改造内容进行了总结论述,可供类似工程参考借鉴。

Based on the project of Chafang Road underpass Xinchangjiang bridge of Jinyong railway, this paper expounds why the pile-board structure is selected for underpass, models and analyze the pile-board structure, simulates its influence on the additional displacement and deformation of the pier body and the change of the additional force of the pile foundation of the high-speed railway bridge during the construction process and later operation. The conclusion, that the influence of pile-board structure underpass high-speed railway bridge is controllable, is obtained. The monitoring requirements and related transformation contents of high-speed railway bridges in the construction process are summarized and discussed, which can be used as a reference for similar projects.