摘要
文章基于某新建地铁隧道近距离平行下穿既有地铁施工工程,采用FLAC3D对平行下穿过程进行了数值模拟,分析了下穿施工中的既有隧道沉降、结构正应力、轴力和弯矩的变化规律。研究结果表明,平行下穿施工的新建隧道将导致既有隧道产生一定的沉降,在下穿施工中应注意对既有隧道衬砌的相关部位进行加固。研究结果能为平行下穿既有隧道的设计和施工提供一定的科学依据。
In this paper,FLAC3D is used to simulate the under passing construction of the existing tunnel based on the new tunnel passing under the existing tunnel in parallel.The existing subway tunnel settlement,structural normal stress,axial force and bending moment are also analyzed.The research result shows that the new tunnel passing under the existing one parallelly will cause a certain settlement of the existing tunnel.The relevant parts of the existing tunnel lining should be reinforced during the underpassing construction.The results can provide scientific basis for the design and construction of underpassing construction.
作者
夏国政
江军
Xia Guozheng;Jiang Jun(Yan-Wei Expressway Management Office,Yantai,Shandong 264003;School of Civil Engineering,Ludong University,Yantai,Shandong 264025)
出处
《工程技术研究》
2020年第22期22-24,共3页
Engineering and Technological Research
关键词
地铁隧道
隧道工程
平行下穿
数值模拟
施工机理
subway tunnel
tunnel engineering
passing under parallelly
numerical simulation
construction mechanism
