叠合式套拱加固带裂损衬砌的破坏机制研究

doi:10.13722/j.cnki.jrme.2015.1001

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Abstract Based on laboratory model test with 1∶10 geometric similarity factor，stacked inner lining has been taken to reinforce the structure with axial cracks on the top lining. With test data，we conclude the failure mechanism of reinforced lining under loose pressure，by analyzing its lateral deformation，development of main cracks，short-term stiffness of lining apex and final failure mode. In addition，we also quantitively study the influence of crack depth on the ultimate bearing capacity. It is important to note that the cracked tunnel works under loose load and the rock resistance coefficient is 10 MPa/m. The results show as follows：(1) the process of failure can be divided into three stages，namely，specimen crack stage，“arch crack-penetrated arch crack”，penetrated arch crack-specimen fail. (2) The main cracks in on the vault and haunch，the overall failure mode is brittle failure. (3) There exist linear relationship between existed crack depth and crack moment，short term stiffness，ultimate load.

Key words： tunnelling engineering tunnel lining crack inner concrete reinforced lining stacked lining failure mechanism model test

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	Articles by authors
	LIU Xuezeng1
	LIU Wenyi2
	SANG Yunlong3
	KONG Fanlin4

Cite this article:

LIU Xuezeng1,LIU Wenyi2,SANG Yunlong3, et al. RESEARCH ON FAILURE MECHANISM OF CRACKED LINING REINFORCED WITH STACKED INNER LINING[J]. , 2015, 34(S2): 4244-4251.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1001 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/IS2/4244

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