| Author | Alagiyawanna, A. M. N. |
| Call Number | AIT Thesis no. GT-93-16 |
| Subject(s) | Shields (Geology)
|
| Note | A thesis study submitted in partial fulfillment of the requirements for the degree
of Masters of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Asian Institute of Technology. Thesis ; no. GT-93-16 |
| Abstract | In this study, a model which could well rep resent the shield behavior in
clayey ground was developed. In modelling the loads acting on the shield, it was
considered as a large load cell. More attention was paid to model the force on
cutter face and that on skin plate. Force due to the earth pressure on the skin
plate is obtained considering the relative displacement of ground around the skin
plate. At the cutter face, earth pressure acting on the circumference and pressure
on cutter face from the mud in the chamber were also considered in addition to
the earth pressure normal to the cutter face.
This model was used to estimate the clayey ground properties by reverse
analysis method. Ground properties were obtained by applying non- linear least
square method to the equilibrium conditions of forces and moments . Modified
Marquart method was used for reverse analysis and linear and non- linear
parameters were separated in the reverse analysis. The overall scheme of reverse
analysis was implemented in a computer program which was coded in FORTRAN 77.
Validity of the model was studied comparing the ground properties obtained from
the reverse analysis with some of the available values. Data used in the reverse
analysis was obtained from the single track railway tunnel project, which was
constructed at the seaside of Tokyo bay by mud shield driven method. Therefore,
ground properties obtained from this study can be used in Tokyo clay layer. |
| Year | 1993 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-93-16 |
| 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.;Noppadol Phein- wej; |
| Examination Committee(s) | Balasubramaniam, A.S.; |
| Scholarship Donor(s) | The Government of Korea; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology |