新建盾构隧道下穿对既有运营隧道的影响分析  

Impact of a New Shielded Tunnel Underpasses the Existing Operating Tunnel

作　　者：顾凯 张向向 陈必港 GU Kai;ZHANG Xiangxiang;CHEN Bigang(Zijin School of Geology and Mining,Fuzhou University,Fuzhou 350108;Research Center of Geological Engineering,Fuzhou University,Fuzhou 350108;Fujian Communications Research Institute Co.Ltd.,Fuzhou 350101)

机构地区：[1]福州大学紫金地质与矿业学院,福州350108 [2]福州大学地质工程研究中心,福州350108 [3]福建省交通科研院有限公司,福州350101

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

基　　金：福建省自然科学基金(2020J05133);国家自然科学基金(42202301)。

摘　　要：为获得新建盾构隧道下穿对既有运营隧道的影响规律,以厦门地铁4号线下穿既有运营公路隧道为例,利用数值模拟软件Midas GTS NX模拟盾构隧道左右线分别下穿既有运营隧道全过程,并探究下穿隧道角度等因素对运营隧道力学行为的影响,研究结果表明:随着盾构隧道不断开挖,既有隧道沉降量不断增大,但既有隧道沉降仅在盾构隧道开挖至运营隧道正下方时才会发生显著改变;既有隧道的最终沉降会随着下穿隧道角度的减小而增大。研究结果可为相似工程提供科学的参考依据。To obtain the influence pattern of a new shield tunnel underpass the existing operating tunnel,the construction case history of the Xiamen Metro Line No.4 underpasses an existing operating highway tunnel is presented in this paper.The com-mercial software Midas GTS NX to simulate the whole process of the shield tunnel under passing the existing operating tunnel in the left and right lines respectively,and to investigate the influence of the under passing tunnel angle and other factors on the mechanical behavior of the operating tunnel,the research results show that:as the shield tunnel continues to excavate,the re-sults show that the existing tunnel settlement increases as the shield tunnel is excavated,but the existing tunnel settlement only changes significantly when the shield tunnel is excavated directly below the operating tunnel;the final settlement of the existing tunnel increases as the angle of the underpass tunnel decreases.The results of the study can provide a scientific reference for similar projects.

关 键 词：盾构隧道 下穿 运营隧道 数值模拟 变形规律 

分 类 号：U456[建筑科学—桥梁与隧道工程]