Dissertation > Excellent graduate degree dissertation topics show

Research on Liquefaction Evaluation Criteria for Silty Soil in Yellow River Delta

Author: ChengChao
Tutor: LiuHongJun
School: Ocean University of China
Course: Environmental Engineering
Keywords: Yellow River Delta Silty soil Liquefaction evaluation Numerical simulation Steady state strength
CLC: TU449
Type: Master's thesis
Year: 2007
Downloads: 111
Quote: 4
Read: Download Dissertation

Abstract


The silty soil in Yellow River Delta have unique liquefaction character , and there is not the uniform liquefaction evaluation. In this paper, dynamic triaxial tests have been carried out in order to establish liquefaction evaluation criteria for silty soil in the Yellow River Delta, for studying the changes of pore water pressure and dynamic shear strain, and then establish the initial liquefaction evaluation criteria, influence of clay content, initial stress ratio, and initial dry density on initial liquefaction evaluation criteria are studied. Then Numerical simulation has been done to validate the initial liquefaction evaluation criteria. At last, the consolidated and undrained triaxial tests have been carried out in order to establish the steady state strength line of silty soil in this delta. This paper drew some conclusions as follows:（1） If the pore water pressure of Yellow River delta can approach the effective confining pressure, then the pore water pressure ratio 1 is considered as the initial liquefaction evaluation criteria. If not, study changes of pore water pressure, the pore water pressure ratio when pore water pressure become steady is considered.（2） The pore water pressure is appropriate to be the initial liquefaction evaluation criteria when clay content is low, the pore water pressure ratio 0.8 and the strain 6% are considered when the clay content between 14% and 24%, and when the clay content is more than 24%, the strain 6% is considered. Initial stress ratio have no effect on liquefaction evaluation criteria of stain, but have effect on the criteria of pore water pressure, the failure pore water pressure ratio decrease when Initial stress ratio increase.（3） The result of liquefaction evaluation of Numerical simulation with the initial liquefaction evaluation criteria is similar to the standard penetration test and static cone penetration test.（4） The steady state line of silty soil in Yellow River delta is shown as e=m(Cclay)+n(Cclay)lgτ, in which: and eontent.

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: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Various types of soil and foundation > Other
© 2012 www.DissertationTopic.Net  Mobile