By Steve Redmond, Victor Romero
Each years, specialists and practitioners from worldwide assemble on the prestigious quick Excavation and Tunneling convention (RETC) to profit in regards to the most up-to-date advancements in tunneling expertise, and the signature tasks that aid society meet its turning out to be infrastructure wishes. within this authoritative 1608-page ebook, you will discover the a hundred and fifteen influential papers that have been provided delivering worthwhile insights from tasks all over the world. you are going to achieve from the teachings learned--often the challenging way--from huge and critical tasks in tough flooring conditions.
This publication will take you underground for a pragmatic, up-close investigate headline-making initiatives from world wide. nearly each point of tunneling is tested. it really is an necessary source for layout and building engineers and contractors within the large-scale civil tunnel who are looking to remain at the innovative in their occupation
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Extra info for 2011 Rapid Excavation and Tunneling Conference Proceedings
This standard can be applied to various types of caverns that linearly change in proportion to the horizontal width of the cavern spring line. A defined linear relationship along the cavern centerline between the vertical distance of the cavern spring line to the top of rail, was established. This allowed for an optimization of the internal cavern crosssection by maintaining the train dynamic clearance envelope, while further improving the ventilation and reducing excavation volume. The optimal profile resulted in reductions to the flexural bending; improving the structural design, while requiring less concrete and reinforcement.
Electronic edition published 2011. East Side Access Manhattan 19 Figure 2. Original GCT3 and GCT5 excavation sequence. Drill-and-blast expansion from TBM tunnel. © 2011 by the Society for Mining, Metallurgy, and Exploration. All rights reserved. Electronic edition published 2011. Contracting Practices and Costs Figure 3. Original GCT3 and GCT5 cross-section 20 © 2011 by the Society for Mining, Metallurgy, and Exploration. All rights reserved. Electronic edition published 2011. East Side Access Manhattan 21 This established the revised plan for the interlocking caverns.
Figure 20. Close up of “knife edge” Figure 21. Demolition of plug remnants Figure 22. “Knife edge” after plug removal © 2011 by the Society for Mining, Metallurgy, and Exploration. All rights reserved. Electronic edition published 2011. DESIGN-BUILD ESTIMATING FROM THE BOTTOM UP Paul W. Dutton ■ Jacobs Associates John M. Stolz ■ Jacobs Associates James J. Brady ■ Lachel & Associates Carlton M. Ray ■ District of Columbia Water and Sewer Authority ABSTRACT The design-build project delivery method presents unique challenges to the preparation of an engineer’s estimate and schedule, which are not encountered with traditional design-bid-build projects.