Author(s): YAO Chao-fan, YAN Qi-xiang, HE Chuan, GENG Ping
Pages: 95-99
Year: 2013 Issue:  12
Journal: Railway Standard Design
Keyword:  shield tunnel; modified routine method; elastic supporting method; beam-spring-compression bar method;
Abstract: In this thesis, the calculation principles were described respectively in relation to the modified routine method, elastic supporting method and the beam-spring-compression bar method. Combined with a certain example of shield tunnel, the distribution characteristics and distribution laws of elastic resistance of shield tunnel as well as its influences on structure’s internal force were comparatively analyzed by using the three methods. Consequently, some conclusions were drawn as follows. The segment joint mainly has some influence on the lining’s bending moment, but it has little influence on the lining’s axial force. The radial elastic resistance would help to diminish the bending moment of segment lining, while it would increase the axial force of segment lining. The bending moment value calculated by modified routine method is the biggest, next is the value by elastic supporting method, and the value by beam-spring-compression bar method is the minimum. Moreover, there is little influence of different analysis methods on the axial force value. It is suggested that: using modified routine method for doing preliminary design of shield tunnel, using elastic supporting method for doing construction documents design, and using beam-spring-compression bar method for doing engineering research and analysis.