盾构隧道管片施工力学性能三维数值模拟研究

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Abstract Research purposes:The external load system and mechanical properties of segment during construction are big different from the normal use． A large number of engineering experiences have shown that the damaged probability of segment during construction is much higher than that during normal use． This paper researches the key elements of the grouting pressure，jacking force and assembling way during construction with the FEM three － dimensional model for the shield tunnel to provide the reference to the similar works．

Research conclusions: The analysis results show that the segment＇s mechanical properties along the vertical direction of the tunnel are big different，and the deformation features of each cirque are not the same and big different from that obtained by the conventional mean value continuous model due to the differences of the external load of the segment along the longitudinal direction of the tunnel and the non － continuity of the joint． The grouting pressure and jacking force have apparent effects on the mechanical properties of segment，and the mechanical properties of segment in staggered joint are quite different from the straight joint．Moreover，the staggered joint structure is better than straight joint in the overall stiffness．

Key words： shield tunnel segment construction stage numerical simulation

Received: 31 March 2012

PACS:

U451

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	ZHANG Peng

Cite this article:

ZHANG Peng. Research on Mechanical Property of Segment of Shield Tunnel During Construction with Three － dimensional Numerical Simulation[J]. 铁道工程学报, 2012, 29(10): 63-69.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2012/V29/I10/63

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