一种适应隧道大变形的限阻耗能型支护结构研发与应用

doi:10.13722/j.cnki.jrme.2018.0184

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Abstract In order to deal with the failure of primary lining in large deformation tunnel，a kind of lining element named support resistant limiting damper(SRLD) was developed through theoretical analysis and test verification. SRLD helps to limit the internal stress of lining and to release the strain energy stored in rockmass by using its post-peak performance. Through laboratory test and engineering practice，design parameters of SRLD were optimized，and design and construction schemes of energy-dissipating lining based on SRLD were formulated. From the engineering practice of SRLD，the following conclusions were obtained：(1) Traditional lining with large rigidity and small deformation ability is not suitable for large deformation tunnel. The primary lining should be designed to accommodate large deformation and to dissipate strain energy. (2) The traditional rigid support can be converted to the “rigid-flexible-rigid” support and possess large-deformation and energy-releasing capability by tangentially embedding SRLD into it. This type of energy-dissipating support has successfully prevented the cracking of primary lining of tunnels deep buried in old loess and of tunnels with high horizontal geo-stress，showing that SRLD is a feasible and effective supporting element. (3) The energy dissipating support based on SRLD guarantees the structural integrity and safety. SRLD is easy to be processed and installed in construction activities. SRLD enhances the construction safety and reduces cost.

Key words： tunnelling engineering large deformation energy release energy-dissipating support support resistant limiting damper(SRLD) post-peak performance

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	Articles by authors
	QIU Wenge1
	2
	3
	WANG Gang1
	2
	GONG Lun1
	2
	SHEN Zhijun4
	LI Chang1
	2
	DANG Jun1
	2

Cite this article:

QIU Wenge1,2,3, et al. Research and application of resistance-limiting and energy-dissipating support in large deformation tunnel[J]. , 2018, 37(8): 1785-1795.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0184 OR http://www.rockmech.org/EN/Y2018/V37/I8/1785

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