Dissertation > Excellent graduate degree dissertation topics show

A Study on Application of Seismic Waves to Tunnel Advanced Geological Prediction

Author: JinZiLiang
Tutor: ZhouJianChun；LiuGuiQiang
School: South China University of Technology
Course: Architecture and Civil Engineering
Keywords: seismic wave geological prediction finite difference numerical simulation GPT
CLC: P631.4
Type: Master's thesis
Year: 2011
Downloads: 13
Quote: 0
Read: Download Dissertation

Abstract


The uncertainty of the surrounding rock is encountered in the process of tunnel excavation have a great influence on the safety of construction, in order to reduce the risk in the excavation process and decrease the destruction of adverse geological disaster to personnel and mechanical equipment, geological forecast technology is of great importance and practical value. The application of the seismic waves to geological forecast has some advantages like it has advanced detection distance and the detecting precision meet the needs of the project, and the interference to construction process is small, so it is widely used in practical engineering. However, because of the fact that seismic wave field in the tunnel is much more complex than elsewhere, it is difficult to identified and segregated effectively, it often has multi-solutions for the detection results of different seismic wave observation, it is necessary to make further research into forecast technology. The paper has studied the seismic waves in geological forecast during the excavation of tunnel, the main research work and achievements are as follows:(1) On the basis of summarizing the characteristic of geological forecast using the theory of seismic waves reflection, according to the feature of tunnel engineering, this paper studied and adopted a new technology GPT for geological forecast during tunnel construction. It adopted the scheme of 6 trigger points and 12 holes many times cover and array observation, so improved and perfected wire siting and the method of data acquisition. For the seismic waves and the method of field detecting work, I carried out forward modeling research, and verified the rationality and validity of the method in this paper.For the first order pushed speed-stress transverse isotropic elastic wave equation, the space of 10 order precision crisscross network difference scheme is derived and used. According to the characteristics of tunnel and the situation ahead of working face, the forward modeling seismic wave field condition of the tunnel in the conditions of free boundary, the artificial boundary and the elastic boundary, and the staggered grids difference computation format are system discussed. And compiled MATLAB calculation program, providing theoretical basis and practical computing tools for the forward modeling of seismic waves. Basing on this, the model of geological surrounding rock which is commonly seen in engineering is established, and got the corresponding results of the theory from its forward analysis and calculation, thus it provide theoretical basis for the forecast prediction technology GPT this paper adopted.(2)The paper studied the dynamics and kinematic characteristic of seismic waves in the array observation scheme this paper employed. Through using the algorithm such as f-k direction filter、wave velocity scanning and reflection seismic migration imaging etc. compiled MATLAB calculation program ,tested the correctness of corresponding algorithm, and provided basis of the rationality for improving and enhancing the results of geological forecast.(3) The engineering application research applying the method in this paper. Using the geological forecast technology GPT in this paper, we carried out field test in 3 tunnels, we got the migration imaging results through the analysis and processing of data, and verified the rationality and validity of the method in this paper through the contrast analysis with site conditions.

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. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13
  21. Numerical Simulation and Experimental Study of Air-Assisted Sprayer of Orchard,S491

CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
© 2012 www.DissertationTopic.Net  Mobile