| Author | Rahman, Md. Zayedur |
| Call Number | AIT Thesis no. GE-95-06 |
| Subject(s) | Shields (Geology)
|
| Note | A thesis report submitted in partial fulfillment of the requirements for the degree of Master of
Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-95-06 |
| Abstract | Controlling of shield due to complicated geological structure is difficult and the
required capacity can not be predicted as a result of snake motion, which is occurred
especially on sharp curve.
To find out the required jack force and moments to drive the shield along any circular
path, a computer program is developed in FORTRAN 77 based on mathematical model for
closed type cylindrical shield which is applicable for both sandy and clayey ground.
The required number of discritized elements on cutter face and skin plate to
approximate the stress condition and the distance between two successive steps for reasonable
approximation of excavated area have been investigated. It is found from this research that
shield is controlled mainly by the position of jack and erector center. Influence of soil
parameter and alig1m1ent on jack force, moments and other index parameters are also
investigated. Jack ·moments increases with the increase of curvature of the path and negligible
moments are required along straight path for this dimension of shield |
| Year | 1996 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-95-06 |
| 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) | Noppadol Phien-Wej ;Bergado, Dennes T. |
| Scholarship Donor(s) | DAAD; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1996 |