新建道路及河道开挖对盾构区间的安全风险研究  

Safety Impact of New Roadway and River Excavation Construction on a Rail Transit Tunnel

作　　者：田帅 魏棒 TIAN Shuai;WEI Bang(China Design Group Co.Ltd.,Nanjing 215000)

机构地区：[1]华设设计集团股份有限公司,南京215000

出　　处：《土工基础》2025年第1期13-16,共4页Soil Engineering and Foundation

摘　　要：以横跨苏州轨道交通4号线清树湾站~花港站盾构区间上方的新建道路及河道开挖为依托,基于道路及河道与盾构区间的相对位置关系和盾构区间结构特点,建立三维数值仿真模型,模拟分析新建道路及河道开挖对既有盾构区间结构的受力变形影响。研究结果表明:河道开挖卸载会引起下方盾构区间的隆起变形,需合理安排轨道交通工程上方的河道开挖顺序,尽量减少卸载暴露时间;道路施工及后续道路通车运营会引起下方盾构区间的沉降变形,施工堆载及重型机械应避开轨道控制保护区。研究成果可为近接轨道交通道路及河道施工设计提供借鉴和参考。Based on the construction of the new roadway and river excavation across the shielded tunnel section from Qingshu-wan Station to Huagang Station of Suzhou Rail Transit Line No.4,and based on the relative positional relationship among the roadway,the river and the shielded tunnel section,as well as the structural characteristics of the shield tunnel section,a three-dimensional numerical analysis model is established to simulate and analyze the impact of the new roadway and river excavation on the stress and deformation of the existing shielded tunnel section structure.The results show that the river excavation and the unloading can cause uplift and deformation of the shielded tunnel section below.It is necessary to reasonably arrange the ex-cavation sequence of the river above the rail transit project to minimize the unloading exposure time;Roadway construction and subsequent roadway traffic operations may cause settlement and deformation of the shielded tunnel section below.The con-struction surcharge load and the heavy machinery should be kept away from the track control protection zone.The research re-sults provide a reference for the construction design of adjacent rail transit roads and river courses.

关 键 词：新建道路 河道开挖 河道回填 数值仿真 盾构区间 安全风险 

分 类 号：U456[建筑科学—桥梁与隧道工程]