Dissertation > Excellent graduate degree dissertation topics show

The Research on Physical Model Experiment of the Load-Unload Response Ratio Pattern and Its Failure Mechanism of Debris Landslide Induced by Rainfall

Author: LiXinZhi
Tutor: HeKeQiang
School: Qingdao Technological University
Course: Geotechnical Engineering
Keywords: Three Gorges Reservoir Area Debris landslide Groundwater level Rainfall Model test LURR Failure mechanism Stability evaluation
CLC: P642.22
Type: Master's thesis
Year: 2008
Downloads: 126
Quote: 1
Read: Download Dissertation

Abstract


Debris landslide major geological disasters in the Three Gorges Reservoir Area Landslide accounted for 64%, and the vast majority are caused by rainfall or groundwater level changes, so figuring out rainfall-induced debris landslide failure mechanism and can be combined with the landslide prediction and forecasting theory debris landslide forecasting is important. Debris landslide in the Three Gorges Reservoir Area, combined with the National Natural Science Foundation funded project \by indoor model test on the basis of surveys and research to study the failure mechanism of rainfall-induced debris landslide, and analysis of rainfall-induced debris landslide LURR regularity and stability of the relationship, the following understanding: systematic investigation and study of the Three Gorges Reservoir accumulation landslide Form Factors and geological conditions of slope accumulation layer material constitute a characteristic accumulation layer segmentation study of the Three Gorges Reservoir, analysis of the debris landslide basic characteristics and dynamical characteristics. Discussed uninstall the feasibility of the dynamic parameters of the groundwater level change as a type of landslide, determine class landslide unloading parameters LURR the parameters and LURR, groundwater levels for loading and unloading means LURR than forecast model. Derived similar parameters of rainfall-induced debris landslide physical model tests to establish the physical model of the debris landslide, the use of a the indoor large landslide model test equipment, Accumulation Slope failure tests under different rainfall conditions, analysis of rainfall groundwater level changes and slope deformation characteristics induced accumulation layer slope failure. 4 stacked layers slope failure mechanism under rainfall, rainwater infiltration and groundwater discharge, developmental slope within the the seepage channel and the discharge passage, while changing the slope substance inside, so that the leading edge of the slope an increase in the fine particles is not conducive to the groundwater discharge. Displacement of the deformation, so that the slope cracks, exacerbated by the infiltration of rainwater and the rainfall intensity, the leading edge of the water table rose rapidly, too late excretion greatly reduce the stability of the slope, causing the slope leading edge First of destruction, causing the entire slope failure. With rainfall-induced accumulation layer slope failure mechanism, the means of loading and unloading and displacement response characteristics of the groundwater level is the correlation coefficient of the loading and unloading response ratio parameters and slope stability, draw groundwater level change side motivation of slope stability, displacement reflects the outward manifestation of the evolution of slope stability, combined the both established LURR than can be able to effectively reflect the state of the slope stability. 6. The stacked layers slope failure in the LURR is with the lower slope stability gradually increases, more unstable slope, its LURR the larger slope stability, LURR than about 1, when the slope instability and failure, the loading and unloading response than mutation, is much larger than 1.

Related Dissertations

  1. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  2. Research on Rainfall Erosivity in Jiangsu Province,S157.1
  3. Raindrop characteristics and signal transmission of the laser,P412.22
  4. Research on Operational Life Span and Applications of Coated Electrode Resistance Welding for Galvanized Steel,TG453.9
  5. Research on Mathematics Understanding of the 8~th Grade Students Based on the IRT,G633.6
  6. 1500 m water depth tension leg platform motion and mooring Numerical and Experimental Study,U661.7
  7. Box foundation on sand ground reaction force base Study,TU471.16
  8. Pull off pieces of structural damage to buried nonlinear analysis numerical simulation,V222
  9. The Design and Experiment Research of Electromechanical Servo,TJ765.3
  10. Lueyang characteristics and typical geological disasters Disaster Formation Mechanism,P694
  11. Dynamic model tests on tanks Platform,TE972
  12. Dynamic damage analysis of concrete gravity dam,TV642.3
  13. Stepped energy combined with auxiliary energy dissipator Experimental Research on Application,TV653
  14. Modern architecture bolted and welded steel welding stress and deformation of,TU391
  15. Shen pipe segment mooring ropes force state Study,U451
  16. Exploratory testing methods in the online game software testing application,TP311.53
  17. Study and Evaluate of Stability and Water Gushing of Surrounding Rockmass in Karst Area Tunnel in Leguang Freeway,U453.61
  18. Study on the Stability Control for the Rebuilding Roadside Slope and Its Retaining Measurements,U417.1
  19. On -line method based on the traffic impact of Guangdong Province, the small bridge converter rainfall load series,U442.3
  20. Littoral city road soft ground reinforcement measures and Evaluation Research,U416.1
  21. Research on Mechanical Behavior of Combined Sections Used in Steel-Reinfouced Concrete Pillar Base,U441

CLC: > Astronomy,Earth Sciences > Geology > Hydrogeology and Engineering Geology > Engineering Geology > The geological and engineering geological > Landslide
© 2012 www.DissertationTopic.Net  Mobile