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Title: Effect of Fully Grouted Passive Bolts on Joint Shear Strength Parameters in a Blocky Mass
Authors: Srivastava L.P.
Singh, Mahendra
Published in: Rock Mechanics and Rock Engineering
Abstract: The present paper discusses an experimental study on shear strength response of unreinforced and reinforced block masses to find out the effect of fully grouted passive bolts on the shear strength parameters of joints in a mass. Direct shear tests were conducted on specimens of large-sized blocky masses, each with a dimension of 750 × 750 × 900 mm. Each blocky mass was assembled by piling elemental blocks of size 150 × 150 × 150 mm. For the reinforced condition, the mass was reinforced with three, five, and nine bolts perpendicular to the shear plane. The tests were conducted at different normal stress levels ranging from 0 to 2 MPa, which are common in rock slopes. Results from the tests show that passive bolts enhance the joint shear strength parameters. The strength enhancement is mainly due to improved interlocking and therefore, enhanced cohesion. The value of enhanced cohesion depends on the bolt area, the ratio of bolt spacing to block size and the strength of the intact material for a given set of steel and grout. A correlation has been established to find out enhanced cohesion for the given joints in the mass. © 2014, Springer-Verlag Wien.
Citation: Rock Mechanics and Rock Engineering, 48(3): 1197-1206
Issue Date: 2015
Publisher: Springer-Verlag Wien
Keywords: Direct shear test
Jointed blocky mass
Passive bolt
Strength parameters
ISSN: 7232632
Author Scopus IDs: 55983116400
Author Affiliations: Srivastava, L.P., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Singh, M., Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Funding Details: A part of this research was carried from financial assistance obtained from NRDMS Division, Department of Science and Technology, New Delhi. The large-size direct shear test apparatus used in this study was procured through financial assistance provided by the SERC Division of Department of Science and Technology, New Delhi under the FIST Programme. The support received from the divisions of the Department of Science and Technology, New Delhi in completion of this research and cooperation received from Dr. Bhoop Singh and Dr. A Mukhopadhyay is highly acknowledged. Department of Science and Technology, Ministry of Science and Technology, India, डीएसटी
Corresponding Author: Srivastava, L.P.; Department of Civil Engineering, India
Appears in Collections:Journal Publications [CE]

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