杨家山黄土连拱隧道数值模拟分析及施工建议  

Research on Numerical Simulation Analysis and Suggestion of Yangjiashan Loess Multiple-arch Tunnel

作　　者：赵栋 Zhao Dong(Shaanxi Provincial Transport Planning,Design And Research Institute Co.,Ltd.,Xi'an 710064,China)

机构地区：[1]陕西省交通规划设计研究院有限公司,西安市710064

出　　处：《北方交通》2023年第9期81-84,共4页Northern Communications

摘　　要：以杨家山黄土连拱隧道为背景,采用Midas GTS数值软件,考虑隧道地形、地质条件、施工阶段、围岩荷载、注浆加固等因素,模拟了黄土连拱隧道施工开挖的全过程,对中导洞及主洞沉降位移等进行了分析,结果表明该类地形地质条件采用连拱方案建设风险较大,应选择小净距或分离式方案。Taking the Yangjiashan loess multi-arch tunnel as the background,Midas GTS numerical software is used to simulate the entire construction and excavation process of the loess multi-arch tunnel by considering factors such as tunnel terrain,geological conditions,construction stage,surrounding rock load,grouting reinforcement and so on.The settlement and displacement of the middle pilot tunnel and main tunnel are analyzed.The results show that the use of the multi-arch scheme for this type of terrain and geological conditions has a high risk of construction,and a small clear distance or separated scheme should be chosen.

关 键 词：黄土连拱隧道 数值模拟 有限元模型 变形沉降 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]