中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2011, Vol. 30 ›› Issue (4): 751-754.DOI: 10.3969/j.issn.1674-0696.2011.04.011

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大断面扩建隧道施工初期支护受力分析

晋学辉1,程崇国2   

  1. 1. 重庆交通大学土木建筑学院,重庆400074; 2. 招商局重庆交通科研设计院有限公司,重庆400067
  • 收稿日期:2011-04-07 修回日期:2011-04-17 出版日期:2011-08-15 发布日期:2015-01-22
  • 作者简介:晋学辉(1986—),男,河南固始人,硕士研究生,研究方向为隧道围岩稳定与监控。E-mail:jinxuehui@yahoo.com.cn。

Support Mechanics Analysis of Enlarging Tunnel with Large Cross-section at Initial Construction Stage

JIN Xue-hui1,CHENG Chong-guo2   

  1. 1. College of Civil & Architecture,Chongqing Jiaotong University,Chongqing 400074,China; 2. China Merchants Chongqing Communication Research & Design Institute,Chongqing 400067,China
  • Received:2011-04-07 Revised:2011-04-17 Online:2011-08-15 Published:2015-01-22

摘要: 运用ANSYS 有限元软件对重庆渝州隧道原位扩建施工进行数值模拟,计算得到隧道地表沉降、扩建隧道初 期支护弯矩及锚杆轴力; 对比分析了计算结果与监控量测数据,得出原位扩建浅埋隧道的地表沉降影响范围,发现 隧道扩挖后围岩内力的重分布对扩挖方向初期支护弯矩和系统锚杆轴力影响较大; 指出在设计和施工时应该加强 扩挖方向围岩及结构的支护和监测。

关键词: 扩建隧道, 初期支护, 施工力学, 数值模拟, 监控量测

Abstract: The value of surface settlement and the value of the flexion and bolt axial force at the initial stage of tunnel lining were worked out by using the ANSYS FEM software to simulate the construction of the onsite expansion of Yuzhou Tunnel in Chongqing. The affected region of subsidence in expansion construction of shallow tunnels was worked out after comparing and analyzing the results of numerical simulation and the monitoring values. The result reflects that the redistribution of rock internal force has comparatively large effect at the initial construction stage of flexion and the bolt axial force in extension regi

Key words: enlarge tunnel, initial support, construction mechanics, numerical simulation, monitoring measurement

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