Experimental Research on Mechanical Performance of Longitudinal Joint of Shield Tunnels with Quick Connectors

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Abstract The shield tunnel is composed of fabricated lining segments and connectors. Segment joint is the weak part of the mechanical performance of shield tunnel, and the form of joint has a great impact on the mechanical performance of the shield tunnel. At present, bolts are commonly used as connectors of shield tunnel in China, such as straight bolts and inclined bolts. There are few cases of fast connector research and application. This paper takes the longitudinal joint of shield tunnel with quick connector as the research object. Through the full-scale joint bending experiment, the bending stiffness and ultimate bearing capacity of the quick joint are studied, and the failure mode of the quick joint is found. The experimental results show that the quick joint has high bending stiffness and good mechanical performance.

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	Articles by authors
	XIAO Mingqing1
	2 XUE Guangqiao1
	2 ZHAO Mingying1
	2

Keywords： Shield tunnel Quick connector Longitudinal joint Bending stiffness Ultimate bearing capacity

Abstract： The shield tunnel is composed of fabricated lining segments and connectors. Segment joint is the weak part of the mechanical performance of shield tunnel, and the form of joint has a great impact on the mechanical performance of the shield tunnel. At present, bolts are commonly used as connectors of shield tunnel in China, such as straight bolts and inclined bolts. There are few cases of fast connector research and application. This paper takes the longitudinal joint of shield tunnel with quick connector as the research object. Through the full-scale joint bending experiment, the bending stiffness and ultimate bearing capacity of the quick joint are studied, and the failure mode of the quick joint is found. The experimental results show that the quick joint has high bending stiffness and good mechanical performance.

Keywords： Shield tunnel, Quick connector, Longitudinal joint, Bending stiffness, Ultimate bearing capacity

Cite this article:

XIAO Mingqing1, 2 XUE Guangqiao1, 2 ZHAO Mingying1 etc .Experimental Research on Mechanical Performance of Longitudinal Joint of Shield Tunnels with Quick Connectors[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(5): 154-162

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http://www.xdsdjs.com/EN/ 或 http://www.xdsdjs.com/EN/Y2022/V59/I5/154