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Abstract: Cut and cover construction method is frequently used for underground structures in densely built-up urban areas for creating underground space for a new transport corridor, as in this case, or expanding urban infrastructure. Paseo del Bajo is a vehicle urban artery locates at Puerto Madero´s heart in the Buenos Aires City, Argentina. Its main corridor is limited to heavy duty vehicles (even...
Abstract: This project involves renovating Minami-sunamachi station on the Tokyo Metro Tozai Line, by converting a single island platform with two tracks into two island platforms with three tracks to eliminate train delays and alleviate congestion during rush hours. Moreover, station facilities, escalator and elevator devices are also relocated to improve passenger flow. This Station was constructed by...
Abstract: Sydney is a fast-growing city with a population of over 5 million. By 2066 this is expected to increase to 10 million people. Road congestion is a growing problem, particularly if measured by the ever-increasing travel times experienced by private and commercial vehicles. Given these concerns it is imperative that Sydney's rail network be expanded to both improve the rail network and enhance...
Abstract: Tunnel Boring Machine (TBM) tunnelling projects in hard and abrasive rock pose different challenges compared with those in soft ground. One of the challenges is the determination of penetration rate of tunnelling and the design of TBM cutter with respect to anticipated ground condition. There is little published information on slurry TBM performance in granitic rock. Two 7.45m dia. slurry TBMs...
Abstract: Methods for analysis and design of segmental tunnel linings are presented inconformance with standards and guidelines from Austria (ÖVBB), France (AFTES), Germany(DAUB), Japan (JSCE), Netherland, United States (FHWA) and International Tunneling Association(ITA). Effect of embedment loads on segments is analyzed using elastic equations, a beam-springmodel, and Finite Element or Finite Difference...
Abstract: The Devil’s Slide tunnel is located along the California coast between Pacifica and Montara, west of the San Francisco Bay in the USA in a region with steep and unstable geological formation. The twin tubes were constructed beneath San Pedro Mountain using the New Austrian Tunneling Method (NATM). Each tube is 9m wide x 6.8m high and 1300m long making it the longest highway tunnel in...
Abstract: FIDIC red book contractual framework is widely used in civil works contracts worldwide. Nonetheless some clauses deserve to be revised to allow their correct application to underground works. In particular the geologic risk sharing principles are not integrated in FIDIC standard contract. On the other hand, about risks other than geology related ones, the FIDIC framework affects some of them...
Abstract: Brittle behavior in the form of spalling, wall buckling and sudden shear release can occur with audibly dramatic results but often no immediate impact on safety or tunnel operations. In heterogeneous geomechanical domains, however, the potential for damaging energy release is possible. Brittle spalling can be easily predicted with conventional and advanced rock mechanics tools. The prediction...