Download PDF by Steve Redmond, Victor Romero: 2011 Rapid Excavation and Tunneling Conference Proceedings

By Steve Redmond, Victor Romero

ISBN-10: 0873353439

ISBN-13: 9780873353434

ISBN-10: 0873353447

ISBN-13: 9780873353441

Each years, specialists and practitioners from world wide assemble on the prestigious fast Excavation and Tunneling convention (RETC) to profit concerning the most up-to-date advancements in tunneling know-how, and the signature tasks that aid society meet its transforming into infrastructure wishes. within this authoritative 1608-page e-book, you can find the one hundred fifteen influential papers that have been offered delivering useful insights from tasks around the world. you are going to achieve from the teachings learned--often the tough way--from huge and important tasks in tough floor conditions.

This e-book will take you underground for a realistic, up-close look at headline-making tasks from all over the world. almost each element of tunneling is tested. it truly is an fundamental source for layout and development engineers and contractors within the large-scale civil tunnel who are looking to remain at the innovative in their career

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Additional info for 2011 Rapid Excavation and Tunneling Conference Proceedings

Example text

In these cases, the rock load was estimated using the empirical approximation by Terzaghi. However, the lining load increment due to the application of the GCT3 loads, was calculated directly from UDEC for all cases. Typically the lower bound solution is expected to yield loading results which are lower than the upper bound solution. The first random joint model analysis of this location however, showed a potential instability mechanism that can develop in between the upper and lower level structures, probably developed due to the limited separation of 15 ft.

Kinematic stability analyses were performed with the limit equilibrium software UNWEDGE by Rocscience Inc For numerical modeling and final design purposes the Universal Distinct Element Code (UDEC) by Itasca was used. For a few selected locations with cross connections between the lower level caverns, three dimensional analyses using the code 3DEC by Itasca, were performed to assess the adequacy of the design. Due to the excavation sequence, which has two 22 ft diameter TBMs boring the running tunnels through the future cavern locations, some initial rock reinforcement is installed from the TBMs.

Electronic edition published 2011. East Side Access Manhattan 29 GEOTECHNICAL ANALYSES General A comprehensive series of geotechnical studies were performed for the design of the lower level GCT4 crossover and wye caverns. Analyses consisted of kinematic stability calculations, to estimate maximum sizes of kinetically feasible wedges and preliminary rock reinforcement requirements, and numerical modeling to assess the redistribution of the stress regime, excavation induced displacements and loading conditions for design of the final lining of the lower level structures.

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2011 Rapid Excavation and Tunneling Conference Proceedings by Steve Redmond, Victor Romero

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