Appendix D TBM Tunnel Assumptions and Cost Estimating Output Discussion: The tunnel costs were estimated using TBM cost estimating software and cost database developed by Hatch Mott MacDonald. Appendix D contains output from the software for each TBM type and tunnel diameter. Please note the following ab out the output: 1.
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Tunnel Boring Machine CTBM) A self-contained and self-propelled structure equipped with a rotary boring head (usually equipped with a number of disk cutters) for the excavation of rock or soil. The excavated material is passed through the structure for delivery to means of transport from the tunnel.
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*costo repuesto: us$0.50- 1.25/m3 tunnel boring machine ventajas: rÁpido avance y continua paredes lisas y uniformes reduce sostenimiento avance hasta 1km/mes condiciones de seguridad poca disturbancia de rocas no existe perf.y voladura menor resist. paso del aire tunnel boring machine operation sistema de transferencia de material
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Slide 11 of 51 Tunnel Boring Machine (TBM) Advantages: Fast advance rates (if all goes well) Segments can be the final lining Economic (if all goes well) Disadvantages: High initial cost (Tailor made TBM for project) Problems with changing geological conditions Need a plant for production of segments Only circular cross-section possible 2012 ...
The Coca Codo Sinclair hydroelectric project uses the natural fall of the Coca River. The excavated cavern for the powerhouse of the Coca Codo hydroelectric plant. A view of the construction site of the Coca Codo Sinclair project. The second tunnel boring machine at the project site. Construction equipments being transported to the project site.
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The boring process can be executed on various machine tools, including (1) general-purpose or universal machines, such as lathes (/turning centers) or milling machines (/machining centers), and (2) machines designed to specialize in boring as a primary function, such as jig borers and boring machines or boring mills, ...
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Precast segments are traditionally used for the lining of tunnels excavated with a Tunnel Boring Machine (TBM), and the use of fiberglass reinforcement in tunnel segments allows several advantages, mainly related to the durability aspects (no corrosion).
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