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Norway is a country with nearly 900 road tunnels on national and county roads. With this number it is necessary to study accidents and other incidents in tunnels. The safety of our tunnels has also been debated in the media. The Norwegian Public Roads Administration therefore decided to do a...
At present in large urbanized areas, the use of underground space (e.g. for basements of buildings) has been increasing in relation to the use of high-rise buildings. However, very few underground structures are designed for staying in comfortably. One of the reasons why there are very few such...
Numerous tunnels have been built and new tunnels are planned in the Swiss Jura Mountains, and most of them intersect Opalinus Clayshale. This paper reviews several tunnel case histories which show that Opalinus Clayshale can be quite problematic by swelling during construction and also during...
Considerable rock construction and tunnelling activity takes place in Norway, annually exacavates approximately 100 km of tunnels. The paper describes two tunnelling milestones in sub-sea tunnelling that were achieved in 1998: 1) excavation of a large sub-sea chamber with only 15m to the sea...
The downward arched submerged floating tunnel (SFT) with no stays is the most economical alternative for free spans up to 1.5 km in deep Norwegian fjords, and in fjords with similar conditions. The SFT is reached through tunnels in the solid rock at both shores. When the clay bed method is used...
Thetract-The paper reviews the pre-tender estimates and actual performances of three Tunnel Boring Machines (TBMs) used to excavate the 45-km-long Transfer Tunnel for Phase 1A of the Lesotho Highlands Water Project. The pre-tender estimates were to a large extent based on the results of...
Management could be considered simply that process which is necessary to achieve the Owner's goals and objectives, such as function, performance, configuration, quality, cost, schedule, operability and maintainability. However, the management of major, complex, underground and tunneling projects...
Three computational fluid dynamics (CFD)-based numerical models—the average-diffused model, the random-stationary and the random-average model-are proposed and developed to simulate the distribution of temperature and carbon monoxide concentration in an underground car park. The...
Estimation of bid prices for hard rock TBM drives needs to incorporate the variability of project duration. The project duration depends mainly on the TBM advance rates, which are difficult to estimate. The advance rate may be estimated from the knowledge about the penetration rate and the TBM...
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