Physical Modeling of Compressive Behaviors of Anchored Rock Masses

Fu, Hongxun; Jiang, Zhongming; Li, Huai-Yu

doi:10.1061/(asce)gm.1943-5622.0000101

Cited by 15 publications

(2 citation statements)

References 6 publications

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“…Bolts are widely used in major projects such as steep slopes and tunnels as an important means of reinforcing the fractured rock masses [15][16][17][18]. Many scholars have conducted extensive research on the anchoring mechanism of bolts in rock masses and achieved many meaningful results [19][20][21][22][23][24][25][26][27]. Ge and Liu [28] studied the effects of different bolt angles, material properties, and friction angles on the shear strength of the joint and proposed a formula for estimating the shear strength of the bolted joint and the optimal anchor installation angle.…”

Section: Introductionmentioning

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: Introductionmentioning

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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show abstract

“…Numerous field and experimental tests [4], theoretical analyses, and numerical simulations [5] have been conducted to analyse ground deformation and bolt fracture failures [6]. In addition, numerous studies have investigated the mechanical behaviors of rock-grout and grout-bolt interfaces [7]. Elastic wave analysis is a traditional nondestructive testing method used to investigate the mechanical behaviors of bolt interfaces.…”

Section: Introductionmentioning

confidence: 99%

Predicting the Ultimate Bearing Capacity of Bolts with an Optimized Function Model

Zheng

Zhang

Feng

et al. 2020

Advances in Civil Engineering

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Bolts are widely employed as an effective ground reinforcement element to secure the underground workplaces. Due to their inherent accessibility, low cost, and easy implementation, rebar bolts are the most popular and commonly used reinforcement in ground support systems. However, it is expensive to obtain failure stage data from in situ pullout tests to study the ultimate bearing capacity of rebar bolts. In this paper, several function models that are commonly used for predicting the ultimate bearing capacity of bolts are presented. Based on these models, a general function model is constructed to replicate the relationship between the load and displacement of a rebar bolt in a pullout test. In addition, the value ranges of relevant parameters in the function model are also assessed. By analysing the general function model, an improved exponential and power function model, which is essential to bolt design, is presented to simulate the load-displacement curve and predict the ultimate bearing capacities of bolts. Comparisons between the improved exponential and power function model and other regular models show that the former has a higher calculation accuracy and good stability. Moreover, a comparison of the predicted ultimate bearing capacity and the test results indicates the reliability of the improved exponential and power function model. The improved exponential and power function model can provide theoretical guidance for the design of rebar bolts applied in reinforcement engineering.

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Experimental Investigation on Rockbolt Performance Under the Tension Load

Chen

Shen

et al. 2019

Rock Mech Rock Eng

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Physical Modeling of Compressive Behaviors of Anchored Rock Masses

Cited by 15 publications

References 6 publications

Anchor Stress and Deformation of the Bolted Joint under Shearing

Anchor Stress and Deformation of the Bolted Joint under Shearing

Predicting the Ultimate Bearing Capacity of Bolts with an Optimized Function Model

Experimental Investigation on Rockbolt Performance Under the Tension Load

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