基于FLAC3D的某地铁隧道横断面开挖变形规律研究  

Research on Deformation Regularity of Cross Section Excavation of A Metro Tunnel Based on FLAC3D

作　　者：杨坦[1,2] 陈雅君[2] 仇亚伟 蒋亚龙[1,2] YANGT Tan;CHEN Yajun;QIU Yawei;JIANG Yalong(Key Laboratory of Building Structure of Anhui Higher Education Institutes,Anhui Xinhua University,Hefei, Anhui 230088,China;College of Civil and Environmental Engineering,Anhui Xinhua University,Hefei, Anhui 230088,China;Anhui Construction Engineering Group Third Construction Company,Hefei,Anhui 230011,China)

机构地区：[1]建筑结构安徽省普通高校重点实验室(安徽新华学院),安徽合肥230088 [2]安徽新华学院土木与环境工程学院,安徽合肥230088 [3]安徽建工集团第三建设公司,安徽合肥230011

出　　处：《中州大学学报》2020年第2期121-124,共4页Journal of Zhongzhou University

基　　金：建筑结构安徽省普通高校重点实验室(安徽新华学院)开放研究项目(KLBSZD201904)资助。

摘　　要：为了分析地铁隧道横断面开挖变形规律对地铁施工安全的影响,本文以合肥地铁某隧道开挖工程为案例,采用Flac3D软件对地铁隧道开挖过程进行模型构建,系统地研究了隧道开挖过程中产生的土体变形规律。模拟结果表明:与不采取支护相比,初期支护后拱顶变形减少了1.14cm,底部位移增加了1.23cm。这与地铁隧道横断面变形监测的数据情况基本吻合,说明数值模型正确,其计算结果具有参考价值。In order to analyze the influence of the excavation law of the cross section of the subway tunnel on the safety of subway construction,this paper takes a tunnel excavation project of Hefei subway as an example,and uses Flac3D software to build a model of the subway tunnel excavation process.Law of soil deformation during the process.The simulation results show that compared with the case without support,the deformation of the vault is reduced by 1.14cm and the displacement of the bottom is increased by 1.23cm.This is basically consistent with the data of the deformation monitoring of the subway tunnel cross section,which indicates that the numerical model is correct,and its calculation results are of reference value.

关 键 词：地铁隧道 数值模拟 变形规律 监测 

分 类 号：TU473.2[建筑科学—结构工程]