Studies of the Diaplacement Behavior Affecting by Joint Orientation, Ground Water, and Tunneling Method

• Main Authors: Alan Kung, 龔台慶
• Other Authors: Chee-Nan Chen
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/84064419920851919895

碩士 === 國立臺灣科技大學 === 營建工程系 === 90 === Studies of the Displacement Behavior Affecting by Joint Orientation, Ground Water, and Tunneling Method Thesis Advisor : Chee-Nan Chen Graduate Student .: Alan Kung ABSTRACT Tunneling is the work in civil engineering that surrounding geological condition plays the dominated role. The geological formation and ground water are considered to be two critical factors during tunneling. A sound geological investigation with the aid of proper numerical analysis is the key to a successful tunneling design and construction, and this methodology is also adopted by tunneling industry worldwide. By using a two dimensional UDEC analytical program, this thesis focuses on analyzing tunneling displacement mechanism by using the two dimensional numerical code UDEC. The first study is related to the tunneling displacement with various joint dip angles and no existence of ground water. The second study is added the ground water affection based from the first study. The third study the displacement variation by using five different tunnel construction methods. Some results are presented finally: (1) When the tunnel’s longitudinal direction is parallel the joint’s strike, the displacement of arch and invert are most affected by smaller joint dip angle no matter how the ground water exists or not. The sidewall displacement will be increase if the dip angle is increased. (2) The displacement of the tunnel significantly increases if ground water exists. (3) Applying the pilot construction method can prolong the displacement process. However, the final tunnel cross sectional displacement of five different tunneling methods will be the same if tunneling in the same geological condition and with two dimensional plane strain assumption.