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WATER LEAKAGE DIAGNOSIS IN METRO TUNNELS BY INTERGRATION OF LASER POINT CLOUD AND INFRARED THERMAL IMAGING
Tunnel Infrared Thermal Imaging Laser Scanning Intensity Data Water Leakage Diagnosis
2018/5/16
Diagnosis of water leakage in metro tunnels is of great significance to the metro tunnel construction and the safety of metro operation. A method that integrates laser scanning and infrared thermal im...
RECOGNITION OF DRAINAGE TUNNELS DURING GLACIER LAKE OUTBURST EVENTS FROM TERRESTRIAL IMAGE SEQUENCES
Time-lapse image sequences glacier lake outburst floods feature tracking glacier movement
2016/11/30
In recent years, many glaciers all over the world have been distinctly retreating and thinning. One of the consequences of this is the increase of so called glacier lake outburst flood events (GLOFs)....
THE ROLE OF ASTRO-GEODETIC IN PRECISE GUIDANCE OF LONG TUNNELS
Astro-geodetic TZK2-D Underground surveying vertical deflection
2016/1/15
One of prime aspects of surveying projects is guidance of paths of a long tunnel from different directions and finally ending all paths in a specific place. This kind of underground surveying, because...
PLANAR PROJECTION OF MOBILE LASER SCANNING DATA IN TUNNELS
Laser scanning point cloud automation adjustment rectification
2014/4/28
Laser scanning is now a common technology in the surveying and monitoring of large engineering infrastructures, such as tunnels, both in motorways and railways. Extended possibilities exist now with t...
Measurements and Correlations of MTBE and BETX in Traffic Tunnels
Characteristic ratio Tunnel Traffic BTEX MTBE
2016/3/28
In this study, the concentrations of five volatile organic compounds (VOCs), including BTEX and methyl tertiary-butyl
ether (MTBE), were investigated in five different traffic tunnels (including Lian...
Investigation and Analysis on Seismic Damages of Mountain Tunnels Subjected to Wenchuan Earthquake
Corresponding Measures Mountain Tunnels Seismic Hazards Wenchuan Earthquake
2011/12/16
Wenchuan earthquake of May 12 struck China with amazement in 2008, which inflicted the devastating destruction to the public transport infrastructures in Sichuan province. Generally speaking, undergro...
Load Calculation Method of Tunnels with Shallow Buried Depth and Unsymmetrical Pressure in Regions of Weak Fissured Surrounding Rock
Lining Load Numerical Calculation Tunnel with Unsymmetrical Pressure Weak Surrounding Rock
2011/12/21
The key problem of supporting structure design is the load calculation in tunnels with shallow buried depth and unsymmetrical pressure in the situation of weak surrounding rock. The results of simplif...
Research on Earthquake Resistant Materials in Mountain Tunnels Crossing Fault
Fault Lining Seismic Decrease Layer Stiffness
2011/12/21
Seismic damage, such as falling, fissure and dislocation of the lining may happen at location of fault movement. The model of enhancing stiffness and that of adding seismic decrease layer are built by...
Radiowave propagation studies in tunnels using ADI-PE technique
Applied sciences Alternating direction implicit Radiowave propagation Tunnels
2014/11/7
Due to the growth of mobile communication systems, there is an increasing demand for numerical techniques capable of predicting signal strength in subway, railway and underground road tunnels. In this...
Study on 3D Geological Model of Highway Tunnels Modeling Method
oriented structure semantic topology rule base 3D spatial data model
2013/3/5
Geology is the base for highways and tunnels construction. With the fast development of national highway construction, highway tunnel construction project are more and more complex. The completeness a...
Aeromagnetic mapping of deep-weathered fracture zones in the Oslo Region–a new tool for improved planning of tunnels
Aeromagnetic mapping deep-weathered fracture zones Oslo Region planning of tunnels
2009/12/2
A new method referred to as the Amager Method (AeroMAgnetic and GEomorphological Relations) has been developed to map the occurrence of deep clay alteration in the bedrock of the Oslo Region. Rock ins...
METHODOLOGY OF USING CFD-BASED RISK ASSESSMENT IN ROAD TUNNELS
tunnel ventilation benchmarking risk analysis
2009/10/14
The definition of the deterministic approach in the safety analyses comes from the need to understand the conditions that come out during the fire accident in a road tunnel. The key factor of the tunn...
The Improvement of the Growth,Fruit Quality and Yield of Watermelon by Revised Method of Low Tunnels
Watermelon Tunnels Managing Non-Perforated
2009/7/10
The effects of ventilation methods on the growth, fruit quality and yield of watermelon in non-perforated low tunnels were examined. The non-perforated low tunnels are usually ventilated by raising an...
Earthquakes and Seismic Faulting: Effects on Tunnels
earthquake elastic dislocation analysis faulting offset tunnel
2009/7/8
A study of tunnels in areas affected by strong earthquakes in the last 50-100 years revealed at least three cases of tunnels damaged by earthquake shaking or offset by seismic faulting, including the ...
Authenticated Wireless Roaming via Tunnels:Making Mobile Guests Feel at Home
Authentication end-to-end security key exchange
2009/6/9
In wireless roaming a mobile device obtains a service from some foreign network while
being registered for the similar service at its own home network. However, recent proposals try to
keep the serv...