Analytical analysis of pullout resistance of the hydraulic expansion rockbolts on a frictionally coupled model

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2016 > Vol13 No.12

	Analytical analysis of pullout resistance of the hydraulic expansion rockbolts on a frictionally coupled model
	Sejin KIM; Heejung YOUN; Kyoungchul KIM
刊名	Journal of Mountain Science
	2016-12
卷号	13 期号:12 页码:2249-2259
关键词	Expansion rockbolt Pullout resistance Pullout load Shear strength
ISSN号	1672-6316
通讯作者	Kyoungchul KIM
英文摘要	This paper proposes an empirical formula to estimate the shear strength of hydraulic expansion rockbolts. The field experimental results were obtained from eleven pullout tests to evaluate the results computed by the proposed formula.It was found that shear resistance of hydraulic expansion rockbolts significantly depends on the uniaxial compressive strength and elastic modulus of rock, with high correlation coefficients of 0.7651 and 0.8587, respectively. The developed formula enables estimation of the maximum pullout load in an analytical process without pullout tests in the field. Conversely, due to the poor interlocking at the initial pullout load, the measureddisplacements were higher than the estimated ones. To reduce the interlocking effects between bolt and rock, we recommendpreloading of 29.4kN. Preload allows reducing the distance between the measured and estimated displacement and making two load-displacement curves practically identical with marginal differences of 1.1 to 1.5mm at the maximum pullout load.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17835]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.12
推荐引用方式 GB/T 7714	Sejin KIM,Heejung YOUN,Kyoungchul KIM. Analytical analysis of pullout resistance of the hydraulic expansion rockbolts on a frictionally coupled model[J]. Journal of Mountain Science,2016,13(12):2249-2259.
APA	Sejin KIM,Heejung YOUN,&Kyoungchul KIM.(2016).Analytical analysis of pullout resistance of the hydraulic expansion rockbolts on a frictionally coupled model.Journal of Mountain Science,13(12),2249-2259.
MLA	Sejin KIM,et al."Analytical analysis of pullout resistance of the hydraulic expansion rockbolts on a frictionally coupled model".Journal of Mountain Science 13.12(2016):2249-2259.