Dissertation > Excellent graduate degree dissertation topics show

The Study of Effects for Additional Stress Field under Urban Environment of Kunming

Author: LiuHaiMing
Tutor: CaoJing
School: Kunming University of Science and Technology
Course: Geotechnical Engineering
Keywords: Kunming Additional Stress Field Urban Environmental Effects FLAC-3D Land Deformation Foundation Pit Engineering
CLC: TU195
Type: Master's thesis
Year: 2008
Downloads: 14
Quote: 0
Read: Download Dissertation

Abstract


The rise and development of environmental geotechnical engineering were reviewed. The research objects and contents are discussed. On this basis, the research method for environmental geotechnical engineering also is studied. This paper holds that combining qualitative and quantitative of comprehensive integrated method is a scientific method at present. Recent research advances on urban environmental effects both at home and abroad were presented. Research content, theory and practice meaning of this paper have been described.Kunming, which is political, commercial and trade center of southwest China, is located Yunnan-guizhou plateau. With the acceleration of urbanization, production, life and a great number of construction activities have caused many environmental geotechnical engineering such as slope failure, land subsidence and foundation pit failure etc. These problems have been increasingly obvious.The definition of additional stress field by the domestic scholars is modified. The internal and external factors of additional stress field have been described on this basis. The external factors can be concluded to load field, hydrochemistry field, temperature field, electromagnetic field and so on from the field angle. The stress in soil-body is called additional stress field due to change of external environment.According to the observation data during the year of 1979-1998, increasingly severe land subsidence has been happened in Kunming city. The hydrogeology condition and engineering geological condition in Kunming area is firstly introduced. A great deal of additional stress field’s problems may be produced due to the fluctuation of groundwater level. The mechanism of land subsidence owing to groundwater over-exploitation is revealed. For one, there is a compressive effect for soil. For another, there is an action of consolidation settlement for soil. There is large thickness of high compressibility soil layer, which is the basic reason for large land subsidence in Kunming city. Then the countermeasure is proposed for land subsidence controlling in Kunming city.The additional stress field will be produced in soil due to city construction. It has unneglectable contribution for regional land subsidence. The deformation influence depth of building complex is discussed. The influence depth is bigger than single building load, but is smaller than the one calculated by routine methods through analysis. The effects of ground settlement under different construction process and construction mode are simulated by FLAC-3D. The results show that the settlement of equivalent load is the biggest, and the settlement of one-by-one constructing mode is little larger than concentration constructing mode’s.Foundation pit engineering has the character of complexity, systemization, uncertainty, etc. It involves strength, stability, deformation and the interaction problems between soil and foundation pit retaining support. Foundation pit engineering may induce many additional stress field’s problems. Land deformation as one of problem has the character of universal and catastrophic. An engineering example is analysised by FLAC-3D and compared with monitoring date and Peck method. The results show that the value of numerical simulation is basically identical with monitoring data.

Related Dissertations

  1. Kunming Transient Population Community Present Situation, Question and Countermeasure Preliminary Study,C924.25
  2. Design and Research of Urban Toilet and Its Landscape,TU993
  3. Secondary vocational schools in Kunming Bai, Yi , Han students physical and comparative analysis of nutritional status,G804.49
  4. Study on the Han Traditional Costumes in Areas of Kunming,J523.5
  5. Kunming GP retraining status and effectiveness of,R197.1
  6. Kunming International Inland Port Development Strategic Planning,F259.27
  7. Sustainable Land Use Based on Circular Economy,F301
  8. On the horizontal layering waste rock fill method in the eastern mountains of iron ore in the thick sloping Application,TD861.1
  9. The Research of Kunming Residential Differentiation,TU984.12
  10. Key Seismic Absorption and Isolation Technique of the Kun Ming New Airport Station-Research on the Structural Design of Compound Isolation,TU352.12
  11. Key Seismic Absorption and Isolation Technique of the Kun Ming New Airport Station-Isolation Effectiveness Research on the Upper Flexible and under Rigid Structure,TU352.12
  12. Planning Researches for Update Mechanisms of Urban Village in KunMing City,TU984.114
  13. Kunming street plant landscape design,TU986
  14. The Impact of Kunming’s Urban Enclosed Village Reconstruction on the Bearing Capacity of Resources and Infrastructure,TU984.114
  15. Research on the Earthquake Response Analyses of the Kun Ming New Airport Station under Multi-support Excitations,TU311.3
  16. The Characteristics of the Forms of Neoteric City and the Factors of the City Forms Evolution,TU984.2
  17. The Kunming Villa class residential building design and analysis,TU241.1
  18. Study on BRT Site Facilities’s Systemtically Design of Kunming,U491.17
  19. Recycling metal crushing test equipment and crushing mechanism,TH87
  20. Studies on the Routes Transmission of Mice Infection with Porcine Circovirus Type 2(PCV-2),S858.28

CLC: > Industrial Technology > Building Science > Building surveying > Exploration technology
© 2012 www.DissertationTopic.Net  Mobile