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Development of Large Direct Shear Test Apparatus for Passive Bolt Reinforced Mass

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Abstract

Shear testing of large size rock mass in the laboratory is a tedious and challenging task. Difficulties further arise when testing is done with rock bolts. Complex interaction between intact blocks of mass, joint and bolts creates problems during shear testing. Hence, for testing of large rock mass with bolts, special technique and facilities are required. The present paper summarized the details of the development of a large sized direct shear testing facility for passive bolt—reinforced rock masses. A specially designed servo-controlled direct shear test apparatus having shear box of size 750 mm × 750 mm × 1000 mm has been fabricated in the Geotechnical engineering laboratory of IIT Roorkee. The normal loading capacity of the apparatus is 1500 kN while shear loading capacity is 2000 kN. To evaluate the performance of the apparatus, specimens of blocky mass were prepared and tested without and with bolts. The present paper discusses the details about the large direct shear apparatus and testing methodology.

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Acknowledgements

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. The authors acknowledge the help and grant received from Head of Civil Engineering Department, Indian Institute of Technology, Roorkee for providing the necessary facilities for laboratory work. The authors also thank to the staff of the Geotechnical Engineering Laboratory, IIT Roorkee, for the assistance given during the testing works.

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Authors and Affiliations

  1. CL Educate Limited, New Delhi, India

    Lok Priya Srivastava

  2. Department of Civil Engineering, Indian Institute of Technology, Roorkee, India

    Mahendra Singh

  3. Hydraulic and Engineering Instruments Company (HEICO), New Delhi, India

    Jattinder Singh

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  1. Lok Priya Srivastava
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  2. Mahendra Singh
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  3. Jattinder Singh
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Correspondence to Lok Priya Srivastava.

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Srivastava, L.P., Singh, M. & Singh, J. Development of Large Direct Shear Test Apparatus for Passive Bolt Reinforced Mass. Indian Geotech J 49, 124–131 (2019). https://doi.org/10.1007/s40098-018-0306-6

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  • DOI: https://doi.org/10.1007/s40098-018-0306-6

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