Inflatable rock bolt bond strength versus rock mass rating (RMR): A comparative analysis of pull-out testing data from underground mines in Nevada

Barnard, Chase K.; Kallu, Raj R.; Warren, S. N.; Thareja, Rahul

doi:10.1016/j.ijmst.2015.11.004

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…Zhuo Yang and Siu Chun Michael Ho et al [1,2] directly monitored the internal force of anchors through intelligent monitoring to describe the stress distribution of anchors. Chase Barnard and Cherdsak Suksiripattanapong et al [3,4] evaluated the mechanical properties of an anchor-soil interface in detail through on-site anchor pull-out testing. Aoxue Chen et al [5][6][7][8] explored the anchor support system of a deep foundation pit and obtained the force and deformation characteristics of the anchors in the foundation pit, pointing out that strengthening the shallow support of the foundation pit can effectively improve the safety reserve.…”

Section: Introductionmentioning

confidence: 99%

Anchor Shear Strength Damage under Varying Sand Content, Freeze-Thaw Cycles, and Axial Pressure Conditions

Dong,

Wang,

et al. 2024

Buildings

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Sandy soil in the north of Hebei region of China is widely distributed, the temperature difference between day and night is large, the phenomenon of freezing and thawing is obvious, and the soil body before and after the freezing and thawing cycle of sandy soil slopes is affected by the changes. This paper takes the stability of a sandy soil anchorage interface under a freeze-thaw cycle as the research background and, based on the self-developed anchor-soil interface shear device, analyses the influence of changing sand rate, confining pressure, and the number of freeze-thaw cycles on the shear characteristics of an anchor-soil interface in anchorage specimens. The research findings indicate that, at 50–60% sand contents, the shear strength increases with a higher sand content and is positively correlated with confining pressure within a higher range. A higher sand content stabilises the anchoring body, but an excessively high sand content can lead to failure. Increasing the sand content, confining pressure, and freeze-thaw cycle number all result in a reduction in the shear displacement at the peak strength. After 11 freeze-thaw cycles, the shear strength of the anchoring body stabilises, with a reduction in strength of approximately 32%, and a higher sand content effectively reduces the reduction in strength.

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