Principles and developments in shallow tunnel construction,Part 2 |
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| Institution: | 1. Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece;2. Department of Chemistry, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY 10027, USA;1. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;2. Department of Structural Engineering, Tongji University, Shanghai 200092, China;1. Leonhardt, Andrä und Partner Beratende Ingenieure VBI AG, Heilbronner Straße 362, Germany - 70469 Stuttgart;2. TU Wien, Karlsplatz 13, Austria - 1040 Vienna |
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| Abstract: | The work at hand illustrates the developments of numerical models for stimulating constructions of tunnels by means of finite elements. Today's models, such as the stiffness reduction method or the support load method, were developed step by step from Kovari's work. The development only arrived at its present level byperforming a great number of back analyses with measured values. The possibilities open to a modern numerical modes are demonstrated using the example of a side tunnel driven for a tunnel constructed according to the NATM. Application of the FEM to tunnel constuction very strongly depends on the possibilities to determine the essential soli parameters with the proper accurary. In this context back analysis will continue to play an important role. The influence of time-dependent deformations on the internal forces of the primary support is shown. |
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