Numerical Simulation Study on Excavation and Lining Support of Partial-Pressured Highway Tunnels

• 责任者：Dong Shuqian (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Chengdu University of Technology ; Chengdu 610069 ; China) ; Wei Yunjie
• 刊名：Journal of Chengdu University of Technology
• 出版年：2010
• 卷期：37(2)
• 关键词：隧道 ; tunnels ; 支护 ; tunnel support
• 页码：p.201-205
• 图表：11 illus., 1 table, 6 refs.
• 分类号：1702
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

On the basis of tunnel geological conditions investigation, this study adopts the finite element to analyze stress, displacement and plastic zone distribution rules in the process of highway tunnel excavation and lining supports. Bolt and shotcrete support obviously controls rock vault and floor heave deformation. The vault vertical displacement significantly is reduced after finishing bolting and shotcrete support and stabilized before finishing the secondary lining. The results show that the most disadvantageous positions are in the dome, arch crown and bottom of the tunnel. So, people should increase the number of bolts in the design, strengthen the initial support and control the thickness of shotcrete to prevent excessive resilient deformation in the process of construction.