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Static and Dynamic Assessment of Tunnel Rock Supports in Weak Rock
Tunnel rock support design can be very intriguing as it involves a high-risk factor and any improper analysis may lead to severe financial loss. Conventional empirical methods along with the numerical analysis provide a better interpretation of the expected problems during the construction. In this study, an approach has been made to understand the effectiveness of various supports in weak rock conditions. The data from the literature is taken as input for modeling using the finite element software PHASE2 of RocScience for both static and dynamic loading. The performance of the supports has been evaluated in terms of stress distribution, plastic deformation to suggest an optimum support system for the available data. For the continuum model, a rock mass devoid of joints was considered and an equivalent Mohr–Coulomb failure criterion was assumed for it. Joints were introduced in the dis-continuum model by providing interface elements. Dynamic analysis has been performed with the pseudo-static and time response method. The results indicate that the combined use of rock bolts and shotcrete as support provides a reliable support system under various static and dynamic forces in tunnel supports.
Static and Dynamic Assessment of Tunnel Rock Supports in Weak Rock
Tunnel rock support design can be very intriguing as it involves a high-risk factor and any improper analysis may lead to severe financial loss. Conventional empirical methods along with the numerical analysis provide a better interpretation of the expected problems during the construction. In this study, an approach has been made to understand the effectiveness of various supports in weak rock conditions. The data from the literature is taken as input for modeling using the finite element software PHASE2 of RocScience for both static and dynamic loading. The performance of the supports has been evaluated in terms of stress distribution, plastic deformation to suggest an optimum support system for the available data. For the continuum model, a rock mass devoid of joints was considered and an equivalent Mohr–Coulomb failure criterion was assumed for it. Joints were introduced in the dis-continuum model by providing interface elements. Dynamic analysis has been performed with the pseudo-static and time response method. The results indicate that the combined use of rock bolts and shotcrete as support provides a reliable support system under various static and dynamic forces in tunnel supports.
Static and Dynamic Assessment of Tunnel Rock Supports in Weak Rock
Lecture Notes in Civil Engineering
Satyanarayana Reddy, C. N. V. (editor) / Muthukkumaran, K. (editor) / Vaidya, Ravikiran (editor) / Choudhury, Jishnu (author) / Gajamer, Vineet (author) / Deka, Dhritilekha (author) / Sreedeep, S. (author)
2021-11-24
13 pages
Article/Chapter (Book)
Electronic Resource
English
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