Optimization of Pipe Roof Reinforcement Applied in Tunnel Construction under Complex Conditions


Haitao Wang

PhD, School of Civil and Safety Engineering, Dalian Jiaotong University,Dalian, China




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 roof reinforcement was put forward. A systematic parameter study was conducted to study the effects of important design parameters such as pipe diameter, pipe length, and overlap length on the mechanical behavior of pipe roof reinforcement. The study illustrates that there exists a critical value of each reinforcement parameter from which maximum reinforcing effect can be derived.
KEYWORDS: Tunnel; Pipe roof reinforcement; Pasternak elastic foundation beam; Optimization

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