02921nam a2200409 4500 20260819084602.0 th eng .b11533535 AIT Thesis no. GE-95-06 Rahman, Md. Zayedur Three dimensional controller of shield behavior Bangkok : Asian Institute of Technology, 1996 109 leaves Thesis ; no. GE-95-06 A thesis report submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering Thesis (M. Eng.) - Asian Institute of Technology, 1996 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 Shields (Geology) Sugimoto, M., Chairperson Noppadol Phien-Wej, Examination Committee Bergado, Dennes T., Examination Committee DAAD, Scholarship Donor Asian Institute of Technology. Thesis ; no. GE-95-06 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B15093 .b11533535 mnait v 240329 0 960910 m a v 0 mnait mnait mnarc 20 40 Barcode : 30050120718597 CREATED : 1995-04-13 RECORD # : i1183643x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120718563 CREATED : 1995-04-13 RECORD # : i11836441 LPATRON : 1013974 LCHKIN : 2001-01-26 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050160081815 CREATED : 2016-05-16 RECORD # : i12977986 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 120825 120825 0 0 0 0 MAIN MAIN mnait 2026-08-19 0 AIT Thesis no. GE-95-06 30050120718597 2026-08-19 08:46:02 1 2026-08-19 20 0 0 0 0 MAIN MAIN mnait 2026-08-19 0 AIT Thesis no. GE-95-06 30050120718563 2026-08-19 08:46:02 2 2026-08-19 20 0 0 0 0 MAIN MAIN mnarc 2026-08-19 0 AIT Thesis no. GE-95-06 30050160081815 2026-08-19 08:46:02 1 2026-08-19 40