Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 290 for “"tunnels"”.
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The horizontal pre-support in tunnels
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.
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On the Characteristics of Fires in Tunnels
Important phenomena related to tunnel fires are presented including both experimental and theoretical work. The main focus is on the large-scale fire tests performed in 2003, in the Runehamar tunnel in Norway. During these tests heat release rate (HRR), temperatures, gas concentrations (O2, CO2, …
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Analysis of Ground-Liner Interaction for Tunnels
Made available in DSpace on 2014-12-13T19:31:48Z (GMT). No. of bitstreams: 1 7913583.pdf: 13284645 bytes, checksum: 4a8402ece55a79351fe99c883ea57d51 (MD5) Previous issue date: 1978
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Response of rock tunnels to earthquake shaking.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Civil Engineering.
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Design of Support Systems for Tunnels in Rock
Made available in DSpace on 2014-12-08T23:57:26Z (GMT). No. of bitstreams: 1 7021020.pdf: 8746795 bytes, checksum: d389576e5e291e95219bc6b66221f7d6 (MD5) Previous issue date: 1970
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Time-dependent behavior of tunnels excavated in shale
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1992.
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Seismic Modeling and Imaging for Detection of Clandestine Tunnels
Covert subterranean tunnels have especially been used for drug smuggling and illegal trading across country boarders such as the United States – Mexico, Egypt – Israel and so on over the years. Conventional border security measures and intel activities of border security agencies remain …
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Underground agriculture: repurposing abandoned tunnels in coal-mining systems
The student, Qingyi Zhao, accepted the attached license on 2016-06-27 at 16:27.
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Long-term behaviour of twin tunnels in London clay
The assessment of ageing tunnels requires a deeper understanding of the long-term behaviour of twin tunnels, whilst lack of permeability data limits the accuracy of long-term predictions. This thesis therefore investigates long-term twin-tunnel behaviour through finite-element parametric analyses, …
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Modelling Transition Zones and Optimal Design Adjoining Tunnels and Bridges
Track transitions, such as bridge approaches, road crossings, and shifts from slab track to ballasted track, are known to be locations where track degradation accelerates due to dynamic and high impact forces. As a result, there is a higher differential settlement, which can cause an abrupt change …
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Accurate aeroacoustic measurements in closed-section hard-walled wind tunnels
… however aeroacoustic measurements in wind tunnels are still required. There is a growing interest in simultaneous aerodynamic and aeroacoustic measurements in hard-walled closed-section wind tunnels. The research hypothesis of this work is whether accurate aeroacoustic measurements are …
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The behavioural responses of stoats (Mustela erminea) to trapping tunnels
… control (Department of Conservation, 2000). Tunnels are used in almost all aspects of monitoring and control associated with stoats, yet few studies have investigated the influence of tunnel design on stoats' behavioural responses to them, or the effect on capture rate (Dilks et al.,1996; …
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Ground Movements Around Model Tunnels in Sand (Settlements, Shield, Photogrammetry)
… ground movements were observed. Single tunnels were tested in the O-, M- and L-series, while two parallel tunnels were excavated one after the other in the T-series tests to investigate interaction effect of the two tunnels on the ground movements.
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Field-Oriented Investigation of Conventional and Experimental Shotcrete for Tunnels
Made available in DSpace on 2014-12-13T19:31:29Z (GMT). No. of bitstreams: 1 7616177.pdf: 24064201 bytes, checksum: 49a7046d16e3da33bb7d8a50a347f017 (MD5) Previous issue date: 1976
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Vibration from underground railways: considering piled foundations and twin tunnels
… such as piled foundations and neighbouring tunnels. Through the formulation of computationally efficient mathematical models, this dissertation examines the dynamic behaviour of these two particular types of structures. The effect of the dynamic behaviour of these structures on the …
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Structural behaviour of concrete segmental lining tunnels: towards design optimisation
… term total deformations and internal forces; in tunnels excavated in grounds with Ko≈1, it becomes the major source of ring distortion. The main transverse actions are the sealing pressures, which are inversely related to the tail clearance, and the transverse load of oblique hydraulic jacks. …
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