The impact of environmental temperature change on the interior temperature of quasi-sandstone in cold region: Experiment and numerical simulation

Shen, Yanjun; Yang, Gang; Huang, Hongwei; Rong, Tenglong; Jia, Hailiang

doi:10.1016/j.enggeo.2018.03.033

Cited by 36 publications

(9 citation statements)

References 34 publications

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“…Using a similar material to simulate the joint, a direct shear test was performed and the entire shear stress-shear displacement curve was recorded under a certain normal load [9,[37][38][39][40][41][42][43]. e white Portland cement numbered 425 and Advances in Civil Engineering muddy river sand with a particle size of 0.5 to 1.0 mm are used for sampling and then casted according to the ratio (mass ratio) cement : sand : water � 1 : 0.53 : 0.45 with the size of 150 × 150 × 120 mm.…”

Section: Sample Preparation and Test Methodsmentioning

confidence: 99%

Anchor Stress and Deformation of the Bolted Joint under Shearing

Lin

Zhu

Yang

et al. 2020

Advances in Civil Engineering

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Bolts are widely used in rock mass engineering, wherein the bolt support improves the safety and stability of the rock mass. To reveal the mechanical behavior of the bolt and failure mechanism of the bolted joint in the shearing process, a direct shear test was conducted by changing the state of grouting, number of bolt, and inclination angle of the bolt. The change in the axial force of the anchor in the shearing process was evaluated by conducting a strain gauge test, and the mechanical behavior of the bolt under the external force was studied. The results showed that under the same normal stress, the yield displacement of the bolt decreased and the stiffness of the joint gradually increased with increased number of bolts. At the same number of bolts, their yield displacement increased with increased normal stress. Analysis further revealed that grouting on the joint improved the force condition of the bolt, increased the yield displacement of the bolt, and coordinated the deformation of the grouting body and bolt, thereby improving the shear strength of the joint. Lastly, when the anchor angles differed, the axial pulling resistance of the anchor changed, and the yield displacement of the anchor with 45° inclination was <90°. The yield displacement of the bolt showed that the supporting effect of the bolt with a 45° inclination was better than that of the bolt with a 90° inclination.

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Section: Sample Preparation and Test Methodsmentioning

confidence: 99%

Anchor Stress and Deformation of the Bolted Joint under Shearing

Lin

Zhu

Yang

et al. 2020

Advances in Civil Engineering

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“…It can be speculated that the densification of marble is the largest among the three kinds of rock. After performing basic physical and mechanical testing, the density of the marble, granite, and sandstone is 2.75, 2.55, and 2.35 g/cm 3 , respectively. The porosity of Three typical rocks of marble, granite, and sandstone were prepared to conduct the frost heaving force measurement testing.…”

Section: Methodsmentioning

confidence: 99%

“…In cold regions, the freeze-thaw (F-T) actions within the preexisting discontinuous (e.g., bedding planes, interbeds, cracks, foliation, flaw, and fault) would lead to the instability and damage of rock, such as avalanche, collapses, rock falling, and landslides [1][2][3][4][5][6]. Water from the thawing of snow or sleet penetrates those rock discontinuities, and freeze occurs when the temperature is below zero and the frost heaving force produces within the preexisting fractures or discontinuities.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Frost Heaving Force (FHF) Evolution in Preflawed Rocks Exposed to Cyclic Freeze-Thaw Conditions

et al. 2021

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This work is aimed at investigating the structural deterioration and the frost heaving force evolution characteristics of flawed rocks using a self-developed frost heaving force (FHF) measurement system. Three kinds of preflawed rocks with different flaw geometry parameters were used to conduct the FHF measurement tests. The testing results reveal five distinguished stages from the frost heaving force evolution curve; they are the inoculation stage, explosive stage, decline to steady stage, recovery stage, and sudden drop stage. In addition, a secondary frost heaving phenomenon is found, and the secondary peak value is lower than the initial peak value. Moreover, the FHF decreases with increasing the F-T cycle number, and its decreasing rate becomes faster at a high F-T cycle. The frost heaving force is affected not only by flaw geometry but also by the lithology. For low-pore hard rock, damage propagates quickly after the occurrence of freeze-thaw damage. It is suggested that the mesoscopic structure of rock affects the water migration and water-ice phase transformation, and rock can be fractured by FHF in the preexisting flaws.

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“…Rock joints widely exist in rock engineering [1][2][3][4]. e mechanical properties of rock joints are considered as the controlling factors of rock mass engineering stability [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Determination of Joint Surface Roughness Based on 3D Statistical Morphology Characteristic

Lin

Qin

Wang

et al. 2021

Advances in Civil Engineering

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Roughness significantly affects the shear behavior of rock joints, which are widely encountered in geotechnical engineering. Since the existing calculation methods on the joint roughness coefficient (JRC) fail to obtain a sufficiently accurate value of JRC, a new determination method was proposed in this study, where the 3D laser scanning technique and self-compiled Python code, as well as the statistical parameter methods, were applied. Then, the shear strength of jointed rock was evaluated via Barton's model, and therefore, a comprehensive comparison between the calculating results and experimental results was executed. Ultimately, the influencing factors of roughness profile extraction on the accuracy of JRC value, such as the measuring point interval, profile number, and measuring direction, were investigated. The results show that (1) equipped with the 3D laser scanning technique, the roughness profiles can be accurately extracted via the self-compiled Python code, (2) an excellent consistency of shear strength could be observed between the calculating value and experimental results, verifying the validity and accuracy of the proposed method, and (3) a smaller measuring point interval can produce a more accurate digital profile and more accurate JRC value. To a certain extent, the more the sample numbers of profiles, the smaller the value of JRC.

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The impact of environmental temperature change on the interior temperature of quasi-sandstone in cold region: Experiment and numerical simulation

Cited by 36 publications

References 34 publications

Anchor Stress and Deformation of the Bolted Joint under Shearing

Anchor Stress and Deformation of the Bolted Joint under Shearing

Experimental Investigation on Frost Heaving Force (FHF) Evolution in Preflawed Rocks Exposed to Cyclic Freeze-Thaw Conditions

Determination of Joint Surface Roughness Based on 3D Statistical Morphology Characteristic

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