Modelling of Response of Tunnels Excavated in Squeezing Ground Condition

AbstractResearch about vection (illusory self-motion) has investigated a wide range of sensory cues and employed various methods and equipment, including use of virtual reality (VR). However, there is currently no research in the field of vection on the impact of floating in water while experiencing VR. Aquatic immersion presents a new and interesting method to potentially enhance vection by reducing conflicting sensory information that is usually experienced when standing or sitting on a stable surface. This study compares vection, visually induced motion sickness, and presence among participants experiencing VR while standing on the ground or floating in water. Results show that vection was significantly enhanced for the participants in the Water condition, whose judgments of self-displacement were larger than those of participants in the Ground condition. No differences in visually induced motion sickness or presence were found between conditions. We discuss the implication of this new type of VR experience for the fields of VR and vection while also discussing future research questions that emerge from our findings.

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Investigation into loosened zones and deformation behaviors of a tunnel in a squeezing ground by means of the multiple-layer supporting method

Tunnelling and Underground Space Technology ◽

10.1016/j.tust.2004.02.029 ◽

2004 ◽

Vol 19 (4-5) ◽

pp. 408-409

Keyword(s):

Squeezing Ground ◽

Multiple Layer ◽

Deformation Behaviors

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Research on the Turbocharger Technology of Piston Aircraft Engine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.457-458.531 ◽

2013 ◽

Vol 457-458 ◽

pp. 531-535

Author(s):

Zhong Jian Pan ◽

Qing Hua He ◽

Yong Guo ◽

Yu Ming Zhao ◽

Jing Yang

Keyword(s):

Simulation Model ◽

High Altitude ◽

Gas Flow ◽

State Power ◽

Aircraft Engine ◽

Cylinder Pressure ◽

Piston Engine ◽

Ground Condition

The supercharger technology of piston aviation engine determines its flight capabilities, and then establishes a turbocharger simulation model of an aviation piston engine. After simulating the engine ground features and 5000-meter altitude characteristics, and comparing the efficiency of compressor and turbocharger in different environments, after the installation of mechanical supercharger, gas flow has been improved, the cylinder pressure decreased about 10% compared with ground condition and engine altitude state power is restored, even 20,000 feet Power restored to 80%, which can meet the needs of high-altitude flight.

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Interpretation of Core Extrusion Measurements When Tunnelling Through Squeezing Ground

Rock Mechanics and Rock Engineering ◽

10.1007/s00603-011-0170-5 ◽

2011 ◽

Vol 44 (6) ◽

pp. 641-670 ◽

Cited By ~ 11

Author(s):

L. Cantieni ◽

G. Anagnostou ◽

R. Hug

Keyword(s):

Squeezing Ground

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Ground Condition Monitoring of a Landslide using Distributed Rayleigh Sensing

10.3997/2214-4609.202131013 ◽

2021 ◽

Author(s):

P. Clarkson ◽

R. Crickmore ◽

A. Godfrey ◽

C. Minto ◽

B. Purnell ◽

...

Keyword(s):

Condition Monitoring ◽

Ground Condition

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Seismic Damage Assessment of Urban Water Supply Pipeline

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.316-317.723 ◽

2013 ◽

Vol 316-317 ◽

pp. 723-726

Author(s):

Jian Qun Jiang ◽

Xiao Wen Yao ◽

Yi Ting Lu

Keyword(s):

Water Supply ◽

Damage Assessment ◽

Longitudinal Direction ◽

Underground Water ◽

Seismic Damage ◽

Pipeline System ◽

Seismic Damage Assessment ◽

Water Pipeline ◽

Ground Condition ◽

Water Supply Pipeline

Water supply pipeline system is a key issue in urban lifeline engineering, and the seismic assessment for the system damage is of significant importance. In this study, method of seismic damage assessment on underground water supply pipeline is introduced. With emphasis on the uncertainties of earthquake level, ground condition, soil-pipe interaction and capacity to resist pipe deformation in longitudinal direction, the check point method is applied to the reliability study of water pipeline, and a case study is presented to show the implementation of the proposed model.

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