A simplified model to study the behavior of pre-tensioned fully grouted bolts around tunnels and to analyze the more important influencing parameters
作者： M. Ranjbarnia , A. Fahimifar , P. Oreste
DOI: 10.1134/S1062739114030156
关键词:
摘要: This paper develops an analytical method to obtain distribution of the axial force in pretensioned fully grouted rockbolts around a circular tunnel. For his purpose, along bolt is calculated by assumption rigid connection between and rock mass. To include effect relative shear displacement, condition end boundaries focused on i.e. reduction head through modeling flexibilities its component (washer, plate …) tunnel surface. Then, this simulated applying fictitious compressive head. The obtained subtract from that connection. According case study, theoretical prediction passive cases comparable in-situ measured data. magnitude pre-tensioning force, delay installing bolts, stiffness head, rockbolt density are considered as parameters perform sensitive analysis.
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