Advanced Search Results For "TUNNEL design & construction"
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Gas Pipeline Response to Underlying Straight-Wall Arch Tunnel Construction.
Publication Type: Academic Journal
Source(s): Buildings (2075-5309). Oct2023, Vol. 13 Issue 10, p2661. 19p.
Abstract: Straight-wall arch cross-sections are usually designed at the entrance and exit tunnels of subway stations, and dense underground pipelines often cross these cross-sections at close range. Among these pipelines, gas pipelines have the highest risk leve...
Directional Core Drilling as an Approach to Reduce Uncertainty in Tunneling Construction.
Publication Type: Academic Journal
Source(s): Applied Sciences (2076-3417). Oct2023, Vol. 13 Issue 19, p10998. 17p.
Abstract: The definition of a rock mass's characteristics is crucial in underground construction to avoid delays and cost overruns. This study proposes a system to quantify the economic uncertainty related to a lack of knowledge of a rock mass in the tunnel cons...
Study on Large Deformation Characteristics and Secondary Lining Supporting Time of Tunnels in Carbonaceous Schist Stratum under High Geo-Stress.
Publication Type: Academic Journal
Source(s): Sustainability (2071-1050). Oct2023, Vol. 15 Issue 19, p14278. 21p.
Abstract: The deformation characteristics and the timing for secondary lining support in high geo-stress soft rock tunnels have drawn significant attention. In carbonaceous shale formations, tunnel construction deformations are very pronounced under construction...
Multiple Disturbances of Existing Tunnels Caused by Deep Excavation and New Shield Tunnel.
Publication Type: Academic Journal
Source(s): Advances in Civil Engineering. 11/24/2023, p1-15. 15p.
Abstract: With the continuous development of urban underground spaces, new underground engineering approaches are becoming more similar to existing operating tunnels. Existing research is typically concerned with the impact of a single project, such as a new tun...
Effect of Undercrossing Shield Tunnels Excavation on Existing Rectangular Pipe-Jacking Tunnels.
Publication Type: Academic Journal
Source(s): Applied Sciences (2076-3417). Nov2023, Vol. 13 Issue 22, p12235. 15p.
Abstract: Shield tunneling underneath existing rectangular pipe jacking can often lead to uneven settling. To solve the problem of excessive deformation of the existing underground pedestrian passages, excavated via the rectangular pipe-jacking method due to the...
Simulation Study on Gas Leakage Law and Early Warning in a Utility Tunnel.
Publication Type: Academic Journal
Source(s): Sustainability (2071-1050). Nov2023, Vol. 15 Issue 21, p15375. 25p.
Abstract: The large-scale construction of utility tunnels improves people's daily life, but also increases the probability of gas leakage events. Gas is a flammable and explosive substance, and once a leakage and explosion accident occurs it will seriously affec...
Photodissociation dynamics of m- and p-cresol in the S1 state: Interplay between the mode-randomization and H atom tunneling reaction.
Publication Type: Academic Journal
Source(s): Journal of Chemical Physics. 11/14/2023, Vol. 159 Issue 18, p1-10. 10p.
Abstract: The H atom tunneling dissociation dynamics of the S1 state of meta- or para-cresol has been investigated by using the picosecond time-resolved pump-probe spectroscopy in a state-specific manner. The S1 state lifetime (mainly due to the H atom tunneling...
Tunneling Current Variations in Small-Sized Devices Based on a Compact Threshold Voltage Model.
Publication Type: Academic Journal
Source(s): Applied Sciences (2076-3417). Oct2023, Vol. 13 Issue 20, p11387. 16p.
Abstract: Accurate modeling of threshold voltage is necessary in the integrated circuit design of strained silicon devices. Thoroughly researching the factors that affect threshold voltage and establishing a more precise threshold voltage model, can provide esse...
Deep level in the InAs/InAsSb superlattice revealed by forward-bias tunneling.
Publication Type: Academic Journal
Source(s): Journal of Applied Physics. 10/7/2023, Vol. 134 Issue 13, p1-8. 8p.
Abstract: The analysis of forward-bias tunneling data to determine the energy position of a deep level in the gallium-free InAs/InAsSb superlattice is reported. The level is found in p–n junction devices built for mid-wavelength infrared detection. The traps tha...
The Principles and Evaluation of Green Construction of Tunnels in Frigid Plateau Regions.
Publication Type: Academic Journal
Source(s): Sustainability (2071-1050). Oct2023, Vol. 15 Issue 20, p15153. 22p.
Abstract: Green construction is an advanced concept and development trend in engineering construction. It is cold and arid in frigid plateau regions in western China, where the ecological environment is vulnerable to engineering constructions and other human act...