新型单层冻结井壁水平极限承载特性试验研究

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Abstract Aiming at the situation that the effective excavated section utilization reduced sharply in composite shaft lining，a new type monolayer shaft lining structure was put forward. To obtain horizontal bearing capacity of this kind of shaft lining，similar simulation tests were used to study horizontal ultimate bearing capacity and deformable character on three shafts. The results indicate that：vertical strain and circumferential strain as well as vertical displacement of shaft lining better consistent with vertical stress，no mechanical hysteresis appeared；vertical pressure loading on shaft wall can be considered as uniform；the concrete strength is independent of poisson ratio，but relate to the elasticity coefficient；vertical maximum positive displacement and maximum vertical load before confining pressure being loaded related positively；vertical maximum positive displacement is almost proportional to the ratio of horizontal displacement and most horizontal load positively；Ignoring vertical pressure，radial displacement is proportional to the level stress positively；the inside compression strain is much larger than the sidewall lateral when shaft lining is crushed，the total inside compression strain is between －2 000 and －2 500 ，sometimes reaches －3 000 ，even exceeding；ultimate bearing capacity of new monolayer freezing shaft lining is higher than common concrete. Researching results have great significance in perfecting design theories of the new type of monolayer shaft lining and guiding it constructing fast and scientifically.

Key words： mining engineering freezing shaft lining ultimate load characteristics experimental study

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	CHEN Xiaoxiang1
	YANG Weihao2

Cite this article:

CHEN Xiaoxiang1,YANG Weihao2. Experimental study oF Horizontal Ultimate loading Capacity of new type Monolayer Freezing Shaft Lining[J]. , 2013, 32(s2): 3740-3748.

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3740

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