盾构下穿既有铁路桥梁的加固与施工方案分析

Analysis of Reinforcement and Construction Schemes for Shield Underpassing Existing Railway Bridge

以盾构下穿早期设计的上海南何铁路西泗塘桥为例,利用数值分析方法探讨了如何在保证既有铁路的运营安全的前提下,实施对地基的加固,以及对旧桥的改造。在此基础上分析了地基加固、桥梁改造、盾构下穿对早期建造铁路运营安全的影响。通过上述工作,为今后管网以盾构形式下穿早期建造的既有铁路设计提供一定的借鉴。

Taking the shield underpassing the early designed Xisitang Bridge of Shanghai Nanhe Railway as an example,numerical analysis method is used to discuss how to implement foundation reinforcement and old bridge modifications under the premise of ensuring the safety of existing railway operation.On this basis,the influence of foundation reinforcement,bridge modification and shield underpassing on the safety of early construction of railway operation is analyzed.Through the above work,some reference is provided for the future design of the pipe network underpassing the existing railways using shield.