ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2014, Vol. 34 ›› Issue (2): 101-106.DOI: 10.3973/j.issn.1672-741X.2014.02.002
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ZHANG Yinping
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Abstract:
Modified routine method is widely used in the calculation of the internal force of shieldbored tunnels, and the calculation parameters are generally selected according to the experience. In the paper, the key calculation parameters of ground penetrating shieldbored tunnel in the modified routine method, i.e., the stiffness reduction ratio (η) and the moment release ratio (ξ), are analyzed on basis of shellspring model, considering the nonlinear relationship between the bending stiffness and axial bending moment of the segment joints. Conclusions drawn are as follows: 1) For shieldbored tunnel with supershallow overburden, the minimum value in the specified range of specifications should be adopted for stiffness reduction ratio (η) and the maximum value should be adopted for the moment release ratio (ξ); 2) When the top of the tunnel is above the ground surface, value 1 should be adopted conservatively.
Key words: ground penetrating shieldbored tunnel, modified routine method, stiffness reduction ratio, moment release ratio
ZHANG Yinping. Study on Ground Penetrating Shieldbored Tunnel Calculation Parameters in Modified Routine Method[J]. Tunnel Construction, 2014, 34(2): 101-106.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.1672-741X.2014.02.002
http://www.suidaojs.com/EN/Y2014/V34/I2/101