Dissertation > Excellent graduate degree dissertation topics show

Nondestructive Testing and Safety Assessment for Supporting Structure of Highway Tunnel

Author: LiSong
Tutor: LiuXinRong
School: Chongqing University
Course: Civil Engineering
Keywords: Highway Tunnel Ground Penetrating Radar Supporting Structure Defect Numerical Simulation Safety Assessment
CLC: U455.7
Type: Master's thesis
Year: 2011
Downloads: 106
Quote: 1
Read: Download Dissertation

Abstract


At present, highway tunnel always use the new Austrian method to construction in our country. Supporting structure may appear quality problems. For example, cavity may exist behind the primary support, shotcrete may appear less thickness, the length and number of bolt may be inadequate, secondary lining may appear less dense or lack of thickness . This paper uses 11 tunnels in Xinzhou to Baode highway as the research background. On-site testing contents, numerical simulation analysis and theoretical analysis are used when cavity exsist behind the primary support and secondary lining appear thickness quality problems. The main research contents and results are as follows:①RAMAC ground-penetrating radar system is used for the quality of the tunnel support structure. On the basis of data collecton and processing, a typical initial support defects and secondary lining defect image are shown.②This paper summarize parts of on-site testing contents of 11 Short tunnel in Xinzhou to Baode highway,such as cavity behind the primary support and thickness quality problems in secondary lining. The regular pattern of position which is easy to cause emerge in primary support and secondary lining is given at last.③Finite element software ANSYS is used to the numerical simulation analysis when cavity exsist behind the primary support, This paper investigated different positions and different size cavity impacting on the displacement of surrounding rock and support structure, distribution of plastic zone of surrounding rock and internal force of primary support.④Finite element software ANSYS is used to the numerical simulation analysis when the secondary lining is as a whole less or the vault, arch back, side wall thickness of less. The safety factor is obtained in deep tunnel at IV-class, shallow tunnel at V-class and deep tunnel at V-class. In order to ensure the safety of the tunnel, the minimum safe thickness is given in all cases.

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study on Springback of High-Strength Steel Stamping,TG386
  3. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  4. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  5. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  6. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  7. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  8. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  9. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  10. Numerical Simulation of Biomass Direct Reburning,TK16
  11. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  12. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  13. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  14. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  15. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  16. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  17. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  18. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  19. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649
  20. Research on Feed Safety of Transgenic Rice in Broiler,S831.5
  21. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13

CLC: > Transportation > Road transport > Tunnel project > Tunnel construction > Tunneling,guided Lane and support
© 2012 www.DissertationTopic.Net  Mobile