Dissertation > Excellent graduate degree dissertation topics show

Settlement Prediction and Calculation of Embankment on Soft Ground

Author: WangZhiLiang
Tutor: YinZongZe
School: Hohai University
Course: Geotechnical Engineering
Keywords: Embankment on Soft Ground Settlement Empirical formula model Biot's consolidation Finite element method Duncan - Chang model Sensitivity Analysis Parameter correction Settlement correction factor No element method
CLC: U416.1
Type: PhD thesis
Year: 2004
Downloads: 1582
Quote: 50
Read: Download Dissertation


Highway settlement has not been rigorously calculation and control, occurs shortly after the completion of pavement cracking, the bridgehead wrong Taiwan and other phenomena, this is not only a threat to the security of transportation, but also resulted in the waste of manpower and material resources. This paper focuses on the Embankment on Soft Ground Settlement Prediction and calculation of the core issues launched following research: (1) embankment settlement prediction model, Forecasting Method. Error Analysis and comparison, the growth curve model is introduced into the embankment settlement under the multi-level load forecasts. Secondly, taking into account the effect of the presence of soft soil rheology, included in the soft soil of secondary compression empirical formula; (2) finite element method for settlement calculation of practical research. Not triaxial test for general road works subject to settlement finite element method, according to the routine testing of soil tangent modulus of the method for determining the correction factor, but also made of sandy soil and viscous soil are applicable to the tangent Poisson's ratio approximate alternative formula; (3) based on improved BP network Duncan-Chang model parameters Correction. Nonlinear finite element program, 8 Duncan - Chang model parameters embankment settlement relationship analyzed in detail to find the main parameters of the impact of settlement; Next, the traditional three-layer BP network has a slow rate of convergence, easy to fall into lack of local minimum, be amended, proposed an improved BP neural network model; Finally, according to the results of the sensitivity analysis, based on improved BP network model for strong nonlinear mapping ability and the early settlement of the measured data, natural subgrade soil nonlinear model parameters back analysis correction; (4) settlement calculation of one-dimensional method considering stress history, lateral deformation studies. Next, for a v , e ~ p method proposed the correction coefficient M consider the soil stress history formula; e-lgp law or stress history revised a v , e ~ p, by a large number of non-linear finite element calculation are given homogeneous embankment and consideration of the non-homogeneous embankment soil lateral deformation of settlement the correction coefficient M 2 formula. Integrated these two aspects, one-way hierarchical synthesis method of calculation results tend to be more accurate, not only considering the stress history, but also included in the soil side even to the deformation properties of nonlinear soil; (5) settlement calculation of embankment element method applied research. This paper discusses the unequal order polynomial basis radial point interpolation element method shape function interpolation scheme, given the Biot's consolidation problem solving plane strain equation, the preparation of the corresponding computer program, and the soft ground The embankment settlement of a non-linear calculations, and achieved satisfactory results.

Related Dissertations

  1. The Effect of Composite Additive on the SNCR,X701
  2. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  3. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  4. A Study on Several Management Questions of BEIEC’s Restructuring,F426.92
  5. Stability Analysis of Roller Compacted Concrete Gravity Dam Based on Time-history Method,TV642.2
  6. Research on Intelligent Aerial Bomb for Forest Fire Fighting,S762
  7. Positioned in the emerging city museum Thinking,G261
  8. Coal miners and practice unsafe behavior measurement,X936
  9. On diversified civil disputes settlement mechanism,D926
  10. A Study of the Legislative Improvement of Multiplex Dispute Settlement Mechanism,D926
  11. On of the WTO dispute settlement mechanism,D996.1
  12. Response of the Capsule Production and Spore Germination of Sphagnum Species in Hani Peatland to Environmental Changes,Q945
  13. Study of Static and Dynamic Collaborative Optimization on Container Ship Structure,U674.131
  14. About the Judicial Reform of Labor Dispute Settlement System,D922.5
  15. On the Settlement Mechanism of Right Conflicts in Title Retention Extension,D923
  16. The Design and Implementation of the settlement center accounting system based on C / S mode,TP311.52
  17. The Band Structure in 2D Resonant Phononic Crystal,O735
  18. Study on the Buildings Deformation Around Expansive Soil Foundation Pit,TU443
  19. Research on Sensing with High Birefringent Photonic Crystal Fiber,TP212
  20. Prediction on Ground Settlements Due to Metro Tunnels Construction,U456.31
  21. Numerical and Experimental Studies for Multi-Cracks of Asphalt Pavement with Semi-Rigid Basement Asphalt,U416.217

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