| Author | Parameswaran, Y. |
| Call Number | AIT Thesis no. GE-95-01 |
| Subject(s) | Shields (Geology)
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of
Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-95-01 |
| Abstract | This research study is confined with developing a three dimensional Simulator of a
cylindrical shield in multi-layered ground based on analytical formulation taking account of
self weight, buoyancy, jack force, ea1th pressure distribution on cutter face which is function
of velocity of shield and rotational speed of cutter face, and the earth pressure distribution on
skin plate which is function of displacement of soil. By considering the equilibrium conditions
of all these forces and moments, the displacement, rotation of shield and the mobilized
coefficient of friction is determined. The Modified Marquart method of optimization is used
for solving the non-linear equations.
To determine the actual stress distribution on cutter face and skin plate , it is divided
into a number of small elements. The required number of elements and the time interval
between two successive steps is investigated from the excavated area. At each steps, the layer
number corresponding to each calculation point is determined by position vector of each point.
From this research, it has been found that shield is behave as unsteady state when it is
in multi-layered ground and it becomes to steady state when the whole pait of shield goes into
the single layer. To investigate the influence of various parameter, the sensitivity analysis is
carried out by fixing all input parameters except only one parameter as variable. The over all
scheme of analysis is done by developing a computer program coded in FORTRAN 77. |
| Year | 1996 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-95-01 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Sugimoto, M.; |
| Examination Committee(s) | Nopodol Phein-wej ;Bergado, Dennes T. |
| Scholarship Donor(s) | The Government of Norway ; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1996 |