地铁盾构区间隧道连续穿越既有铁路桥影响研究  

Study on the influence of metro shield tunnel continuously undercrossing existing railway viaducts

作　　者：黄松 Huang Song

机构地区：[1]贵阳市公共交通投资运营集团有限公司,贵州贵阳550081

出　　处：《现代城市轨道交通》2023年第2期60-65,共6页Modern Urban Transit

摘　　要：随着城市化进程的发展,在地铁建设中盾构隧道不可避免地会从既有桩基的周围穿过,而盾构隧道开挖时造成的地层损失导致桩基变形,对上部结构的稳定和运营安全造成一定的影响。因此,对盾构隧道掘进施工引起临近桩基变形的影响进行研究十分必要。文章对地铁盾构施工连续下穿既有铁路桥动态施工过程进行模拟,分析不同净距下桩基沉降及相邻桩差异沉降变化,预测盾构施工对既有铁路桥的影响,为盾构施工控制提供技术支撑,也为其他类似工程提供借鉴。With the development of urbanization,metro construction will inevitably pass by pre-existing pile foundations and the stratum loss caused by shield tunnel excavation will lead to the deformation of some pile foundations,affecting the superstructure’s stability and operational safety.Therefore,it is important to study how the process of shield tunneling construction affects the adjacent pile foundations.This paper simulates the dynamic construction process of shield tunneling under high-speed railway viaducts,analyzes the pile foundation settlement and the differential settlement of adjacent piles under different clear distances,predicts the impact of shield tunneling on railway viaducts,provides technical support for shield construction control,and also provides references for similar projects in the future.

关 键 词：地铁 盾构隧道 穿越 铁路桥 沉降 

分 类 号：TU443[建筑科学—岩土工程]