scholarly journals Finite Element Analysis for the Problem of Tunnel Excavation Successive Phases and Lining Mounting

10.5772/46168 ◽  
2012 ◽  
Author(s):  
Simona Roatesi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Tunnel Excavation

Incremental Variable Plastic Three-Dimensional Elastic-Plastic Finite Element Analysis in Soft Rock Tunnel Excavation

2014 ◽  
Vol 508 ◽  
pp. 243-248 ◽  
Author(s):  
Jun Peng Li ◽  
Xiao Li ◽  
Dong Qing Zhu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Soft Rock ◽  
Analysis Model ◽  
Element Analysis ◽  
Tunnel Excavation ◽  
Elastic Plastic ◽  
Stiffness Method ◽  
Rock Tunnel

The plane finite element analysis is mostly adopted in soft rock tunnel excavation instead of three-dimensional nonlinear finite element analysis at present, but almost every underground engineering is a spatial nonlinear problem which, in many cases, cannot be simplified into a plane problem. This paper presents a three-dimensional elastic-plastic finite element analysis of incremental variable plastic in soft rock tunnel excavation, through analyzing the tunnel excavation and support, and combining the incremental variable plastic stiffness method into three-dimensional elastic-plastic model in light of the advantage of increment variable stiffness method and the incremental additional load method. Simulation results show that, the three-dimensional elastic-plastic finite element analysis model presented in this paper changes little final deformation under different load release coefficients, together with small support stress.

Surrounding Rock Rupture Modeling of Tunnel Based on ANSYS

2014 ◽  
Vol 490-491 ◽  
pp. 863-866
Author(s):  
Bai Cheng Ren
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Rock Mass ◽  
Surrounding Rock ◽  
Analysis Software ◽  
Element Analysis ◽  
Tunnel Excavation ◽  
Real Condition ◽  
Supporting System ◽  
The Real

This article is based on the real condition of a tunnel. By using displacement and stress contours get from finite element analysis software ANSYS, the simulation of the tunnel excavation is modeled and the regulation of overlying rock’s displacement and stress is deducted during the evacuation of the tunnel. The analysis result to overlying rock mass’ rupture regularity can be helpful for the control of surrounding rock’s stability and the improvement of supporting system. The result shows finite element analysis software ANASYS can be used to guide tunnel constructions during the evacuation.

Finite Element Analysis of the Construction of the Subway Tunnel Test Section below through the Railway Bridges

2012 ◽  
Vol 170-173 ◽  
pp. 1648-1651
Author(s):  
Run Ke Huo ◽  
Pei Yuan Lun ◽  
Yong Zhen Yao ◽  
Jie Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structure Stability ◽  
Subway Tunnel ◽  
Element Analysis ◽  
Tunnel Excavation ◽  
Railway Bridges ◽  
Working Face ◽  
Harbin City ◽  
Primary Support

During the construction of city subway, it often needs to cross under the existing buildings, which will have some influence on these buildings. The article, taking the engineering of subway tunnel in Harbin city for example, uses finite element analysis software to simulate the dynamic excavation of the tunnel, and combines with the measured data of actual monitoring, analyzes the primary support structure stability in the process of tunnel excavation. Finally it draws the conclusion that the stress and displacement near the working face change greatly, the springback displacement of tunnel bottom is big, fracture surface near the entrance of the hole tends to be stable with the excavate of the working face.

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