Dissertation > Excellent graduate degree dissertation topics show

Model Test of Deformation of High-Speed Railway Embankment Overlying Mined-Out Area

Author: ZhangShiLiang
Tutor: ChengQianGong
School: Southwest Jiaotong University
Course: Geological Engineering
Keywords: Roadbed Above Mined-out Area Pile-Plank Structure Model Test Deformation
CLC: U213.15
Type: Master's thesis
Year: 2013
Downloads: 10
Quote: 0
Read: Download Dissertation


The mined-out area is commonly avoided in most of the high-speed railway in China at present, and some small mined-out area is controlled considering the straight and smooth of the railway track.There is alreadly some researches about pile-plank structure in soft soil foundation, but the corresponding research of this structure used in mind-out area is rare. In this dissertation, based on the regulation project for mined-out area below the WuFuShan station roadbed of Hefei-Fuzhou high-speed railway, the working mechanism and the settlement of the pile-plank structure were studied by model test. The main achievements of the research are showed as follows:①The axial force gradually decreases with the increment of the pile depth, the maximum axial force appears at the top of the pile, the axial force is constant in the mined-out area; the end bearing capacity gradually decreases with the increment of the pile length.②The skin friction of piles decreases with the increment of the pile depth, it is bigger on the upper section of the pile and is zero in the mined-out area; the load shared by the skin friction increases with the growth of the pile length.③The change regulation of the pile-soil stress ratio is similar to the sharing stress ratio of piles, they both increase with the increment of loads, The pile-soil stress ratio is127and the sharing stress ratio of piles is55.8%at the ultimate load.④The settlement gradually increas with the increment of the load; the settlement in different locations are diverse, but the difference is very small; it turns out to be that the plank is rigid under loads, it is affected by forces and appears to sink as a whole; as the load increases, the settlement curves are steep initially and become gentle later, and remain a stabilized increasing trend finally.⑤The treatment effect of pile-plank structure used for mined-out area is essentially obvious. The overall settlement of the plank is relatively small, and the axial force of the pile is small around the mined-out area and the settlement on the roof of the mined-out area is barely zero value.

Related Dissertations

  1. With shape memory alloy (SMA) fiber composite box driven nonlinear deformation of thin-walled beams,TB33
  2. Usage of Balance Supporting Technology for Weak and Fractured Surrounding Rocks of Roadways in Deep Shaft in Yangchen Colliery of Jining Mining Groupcompany,TD353
  3. Research on the Stability of Roadway Group in Deep Coal Mine,TD353
  4. Wavelet Transform with Applications in Data Processing of Bridge’s Deformation Observation,TP274
  5. The Analysis of Bridge Deformation Prediction Based on Chaotic Time Series,U441
  6. Study on Building Damage Rules and Application of Two-Slab Foundation,TD325
  7. The Research of Buildings Damaged Evaluation Model for Surface Movement,TU746.1
  8. Analysis of Shovel Welding Residual Stress Based on Finite Element Method,TG404
  9. Study on the Algorithm of Cranio-facial Reconstruction,TP391.41
  10. The Research of Low-speed WEDM’s Thermal Error Compensation Method,TG48
  11. Research on Influence and Countermeasures to Highway above Subsidence-affected Zone of Coal,TD325
  12. Research on Rock Burst Forecasting about Charge Induction Signal of Coal-rock Mass,O347.2
  13. Slop Deformation Analysis of Subway Excavation Under Rainfall Infiltration,TU43
  14. Study on the Effect of Unsaturated Soils on Excavation and Slope,TU43
  15. Study on the Buildings Deformation Around Expansive Soil Foundation Pit,TU443
  16. Study on Deformation of Pile-Brace Foundation Pit in Asymmetric Excavation,TU433
  17. Numerical Analysis of Resistance Spot Welding Process of High Strength DP600 Steel,TG453.9
  18. Software Development of Tunnel Deformation Monitoring Based on Digital Image Processing,TP391.41
  19. Research on the Model Test and Evaluation of Foundation Grouting Effect in the Immersed Tube Tunnel,U451.5
  20. An Experimental Study on Characteristics of Overtopping Flow Against Sea Dikes in Regular Waves,TV139.223
  21. Research on the Same Scale Model Test and Evaluation of Foundation Grouting Effect in the Immersed Tube Tunnel,U459.5

CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > Subgrade > Subgrade reinforcement and protection
© 2012 www.DissertationTopic.Net  Mobile