jgg     2008 28 (6):  112-116    ISSN: 0412-1961  CN: 21-1139/TG RINGS PREDICTION MODEL INCONSTRUCTION OF LONG-DISTANCE TUNNEL SHIELD AND ITS COMPUTER SYSTEM REALIZATION Liu Chun 1,2) ;Jing Yi 1,2) ;Wang Jiexian 1,2) ; and Yao Lianbi 1,2) 1)Department of Surveying and Geo-Infomatics, Tongji University, Shanghai 2000922)Key Laboratory of Advanced Engineering Survey, SBSM, Shanghai 200092 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null