Optimization Design of Pipe Umbrella Method Applied in Underground Ezcavation

摘要：

Considering the delay effect of initial lining and revising the Winkler elastic foundation model, an analytical approach based on Pasternak elastic foundation beam theory for pipe umbrella reinforcement was put forward. This model was then reviewed with an actual case study of the Qiaozhuang tunnel. The results prove that reinforcing pipes act as a lever, which increases longitudinal load transfer to an unexcavated area, and consequently decrease deformation and increases face stability. Finally, a systematic parameter study was conducted to study the effects of important design parameters such as pipe diameter and pipe length on the mechanical behavior of pipe umbrella reinforcement. The study illustrates that there exists a critical value of each reinforcement parameter from which maximum reinforcing effect can be derived.

关键词： Tunnel Pipe umbrella reinforcement Pasternak elastic foundation beam Optimization design

作者: Haitao Wang Jinqing Jia

作者单位: State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, 116024, P.R. China

会议类型: 国际会议

会议名称: The First World Congress on Global Optimization in Engineering & Science(第一届工程与科学全局优化国际会议 WCGO2009)

会议地点: 长沙

会议语种:英文

页码: 694-699

在线出版日期: 2009-06-01（万方平台首次上网日期，不代表论文的发表时间）