Experimental Study on the Influence of Joint Fillers on the Crack Initiation Strength of Rock Masses

QU Zhihao; HUANG Feng; Zheng Aichen; GAO Xiaoye

doi:10.13204/j.gyjzG21062915

Volume 52 Issue 8

Aug. 2022

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QU Zhihao, HUANG Feng, Zheng Aichen, GAO Xiaoye. Experimental Study on the Influence of Joint Fillers on the Crack Initiation Strength of Rock Masses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(8): 175-179. doi: 10.13204/j.gyjzG21062915

Citation:

QU Zhihao, HUANG Feng, Zheng Aichen, GAO Xiaoye. Experimental Study on the Influence of Joint Fillers on the Crack Initiation Strength of Rock Masses[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(8): 175-179. doi: 10.13204/j.gyjzG21062915

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Experimental Study on the Influence of Joint Fillers on the Crack Initiation Strength of Rock Masses

doi: 10.13204/j.gyjzG21062915

State Key Laboratory of Mountain Bridge and Tunnel Engineering, School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China

Received Date: 2021-06-29
Available Online: 2022-12-01

Abstract

Abstract

Three kinds of materials—cement, mud and gypsum, were used as fillers to fill jointed rock specimens with single crack, and uniaxial compression tests were conducted on the specimens. The analytical expression about initiation strength of crack for closed crack under uniaxial compression was established and numerical simulations were performed to further study it. The results showed that under uniaxial compression, the initiation strength of crack for specimens simulated by the friction coefficient theory was basically consistent with the peak strength from indoor tests. The larger the friction coefficients of fillers were, the less easier the damage of jointed rock masses, and the initiation strength of crack for rock masses with fillers was greatly improved than that without fillers. The peak strength of cement-filled jointed specimens was highest and mud-filled jointed specimens was lowest. Shear failure was the main failure mode of specimens filled with mud, the failure form of specimens filled with cement and gypsum was complex. With the increase of filler strength, the failure mode of jointed rock mass would change from shear failure to tension failure.
- filler,
- closed crack,
- friction coefficient,
- indoor test,
- initiation strength of crack

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References(16)

References

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