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Information Journal Paper

Title

Analytical simulation of passive and pre-tensioned grouted rockbolts performances in bedding rock slopes

Pages

  1485-1498

Abstract

 Rockbolts are one the best systems to stabilize plane failure of rock slopes. The passive bolts are loaded and activated when rock block slides while pre-tensioned types are initially loaded prior to any rock sliding. The pre-tensioned rock bolts make the rock layers pressed together and the friction between them is activated before slipping, and probably no displacement between the layers is occured. If a slippage occurs after the installation of a pre-tensioned rock-bolt, an excessive load is applied. In this paper, the bolt contribution generated by the pre-tensioned and passive rock-bolt in discontinuity is analytically simulated, and the effect of roughness angle, inclination of the bolt to the joint plane, pre-tensioned force, and strength of the rock are evaluated. For modeling, it is assumed the sliding imposes a bending moment to the rockbolt, which leads two plastic hinges to be created. The part of bolt between two hinges (located in either sides of the joint) is considered a beam with two cantilever supports, which is loaded by a uniform distribution generated by surrounding grout/ rock. The results show the pre-tensioned rock-bolts are effective when the resistance of the rock or grout around the bolt is high.

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    APA: Copy

    Rashedi, MirMahdi, & RANJBARNIA, MASOUD. (2020). Analytical simulation of passive and pre-tensioned grouted rockbolts performances in bedding rock slopes. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), 52(6 ), 1485-1498. SID. https://sid.ir/paper/1036300/en

    Vancouver: Copy

    Rashedi MirMahdi, RANJBARNIA MASOUD. Analytical simulation of passive and pre-tensioned grouted rockbolts performances in bedding rock slopes. AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR)[Internet]. 2020;52(6 ):1485-1498. Available from: https://sid.ir/paper/1036300/en

    IEEE: Copy

    MirMahdi Rashedi, and MASOUD RANJBARNIA, “Analytical simulation of passive and pre-tensioned grouted rockbolts performances in bedding rock slopes,” AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR), vol. 52, no. 6 , pp. 1485–1498, 2020, [Online]. Available: https://sid.ir/paper/1036300/en

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