Dissertation > Excellent graduate degree dissertation topics show

Study of Silt Subgrade Filling Technology in Taizhou Area

Author: XuanZhenHua
Tutor: XuYongFu；TangXueJun
School: Shanghai Jiaotong University
Course: Geotechnical Engineering
Keywords: silt compaction rolling compaction technique finite element rainfall infiltration
CLC: U416.1
Type: Master's thesis
Year: 2012
Downloads: 45
Quote: 0
Read: Download Dissertation

Abstract


Recently, along with the rapid development of Chinese economy, road construction in our country is also booming. However, highway distress, particularly in silt areas, keeps cropping up due to increasing traffic volume and car axle load as well as problems concerning road design and construction. It is widely proved that effective compaction of subgrade helps enlarge road service life. Therefore, effectively compacting subgrade plays a significant role in road construction.Taizhou city, located in the middle and lower reaches of the Yangtze River, abounds in low liquid limit silt. Silt is different from clay and sand and has its unique engineering properties. As silt is characteristic of poor gradation, cohesion and water-retention ability, ideal compaction is hard to achieve by employing conventional compacting technique. So it is significant to study roadbed filling using low liquid limit silt in Taizhou area while ensuring sufficient compactedness. For this purpose, this thesis, focusing on rolling compaction technique of low liquid limit silt, has carried out the following tasks.(1) Laboratory test has been conducted to get the physical properties of silt in Taizhou area like gradation, liquid plastic limit, optimum moisture content and optimum dry density, based on which various rolling compaction techniques are put forward and field compaction experiments are conducted. The best compaction technique is found after comparing the compactedness under different techniques.(2) Dynamic test scheme is designed and formulated on the basis of field rolling compaction experiments to test the acceleration of vibrating roller in the subgrade. Signal analysis is conducted on the acceleration to study the distribution of acceleration along the depth and attenuation law of dynamic energy.(3) Three-dimensional finite element model on roadbed rolling compaction is established on the basis of ABAQUS large scale finite element analysis tool. Numerical simulation results are contrasted with real test results to validate the model. By virtue of the established finite element model, influences of different rolling compaction techniques, loose laying depths and rolling compaction speeds on compactedness are studied.(4) With the help of ABAQUS finite element software, numerical simulation test is conducted on silt side-slope rainfall infiltration, in an effort to study the slope deformation after rainfall and the protective effect of vegetation against the slope rainfall infiltration.

Related Dissertations

  1. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  2. EDM Electrode Wear Mechanism and Control Research,TG661
  3. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  4. Finite Element Analysis and Structure Optimal Design for Combined Seal at Normal Temperature and Low Temperature,TH136
  5. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  6. Simplified Analysis of Semi-Rigid Steel Frames under Vertical Loading,TU391
  7. Based on Nonliner Finite Element Analysis of the Infilled Wall Frame Structure,TU323.5
  8. Stability Analysis of Roller Compacted Concrete Gravity Dam Based on Time-history Method,TV642.2
  9. Study on the Design and Biomechanical Behaviors of Individualized Artificial Knee Joint,R318.1
  10. Design of Testing Equipment for Electronic Products,TN06
  11. S-lay Installation Analysis for Deepwater Pipeline,TE973
  12. Research on Intelligent Aerial Bomb for Forest Fire Fighting,S762
  13. Multi-pin Internal Fixation of Calcaneal Fractures in Finite Element Analysis,R687.3
  14. The Analysis and Comparison of Adjacent Segment Degeneration of the Finite Element Caused by Three Posterior Lumbar Fusion Style,R687.3
  15. The Establishment and Preliminary Application of the Three-dimensional Finite Element Model of Ankle Joint,R687.3
  16. Different Bottom Structure of Dental Brackets Affect the Adhesiveness-Three Dimensional Finite-element Analysis,R783.5
  17. Airborne radar antenna pedestal rapid design systems research and development,TN959.73
  18. Sham hose drum drive means and hydraulic system of the structure,TE973
  19. The magnetorheological damper mechanical properties and Gun Recoil,TB535.1
  20. Nonlinear Structural Dynamics Analysis and Optimization Design on Naval Gun Driver,TJ391
  21. The Large Concrete Hydration Heat Temperature Effects Research of the Cable Stayed Bridge,U441.5

CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Subgrade
© 2012 www.DissertationTopic.Net  Mobile