Search

Snow removal is a critical security issue in airports, where heat-pipe technology can be an environmentally friendly and efficient alternative to traditional approaches for snow removal. This study investigated the long-term thermal regime of airfield-runways equipped with a heat-pipe system, using data collected over several recent years from two full-scale snow-melting systems, one located in Beijing, and the other in Harbin, China. The findings showed that the heat-pipe system automatically increases the airfield-runway surface temperatures by up to 17 °C utilizing geothermal energy in winter for preventing icing. Surface temperature levels up to 0 °C were observed to increase by over 25% when a shallow pipe embedded depth and a longer pipe evaporation section were selected. However, the surface temperature was less affected by the diameter of the heat-pipe. Field experiments indicated that, the heat-pipe technology threshold value for the airfield-runway snow-melting performance was an ambient air temperature exceeding −10 °C. Using the heat-pipe technology, the snow-melting rate on an airfield-runway was about 3–8 mm/h within the working range, and there was therefore a decrease in the snow-cover durations. Particularly, the heat-pipe airfield-runway was always free of snow when the average ambient air temperature exceeded −4 °C. The statistical results illustrated that the heat-pipe airfield-runway snow-melting system is applicable in more than 78% of the cities in China, indicating that this technology is feasible and practical in China and can be applied in other countries.

Porous asphalt is a commonly used material for permeable pavement. However, porous asphalt will inevitably result in void structure clogging and affect its drainage function in the road service period. Most studies focus on macroscopic permeability but ignore microscopic seepage behavior in void structure, which is unfavorable for the understanding of the change in the permeability of porous asphalt. In this study, we described the microscopic water migration of the porous asphalt with the seepage depth, seepage velocity, and seepage path, and clarified the void structure evolution and the water migration characteristics variation during the clogging. On this basis, we explored the impact of the size of clogging particles and the void content of porous asphalt on the variation of water migration. The data demonstrate that water migrates and branches along the void structure of porous asphalt under the action of inertia force. The deposition of clogging particles in the void hinder the migration of water and restrict the water distributary. However, the clogging process does not affect the dominant effect of inertia force on water migration. Water migration is more impeded by small particles due to their more significant water absorption effect. The increased void content of porous asphalt can reduce the effect of clogging on the void structure. This research can help us understand the evolution of water migration characteristics at a micro-level.

On the background of airfield engineering of Chengdu Tianfu International Airport, firstly, the paper introduces the construction method of vibrated stone column piles and explains its importance in foundation treatment. Secondly, it describes the basic concept of vibrated stone column piles and the digital monitoring system, and mainly describes the system function of the digital monitoring system. Thirdly, it shows that the system is fully installed and used in the construction of the airport. Finally, we analyzed the collected real data to testify our opinion that the system can optimize management level, ensure and improve the quality of the airport construction.

Application of gravel pile is a common foundation treatment method in civil engineering infrastructure constructions. The main purpose is to improve the foundation bearing capacity, reduce deformation and enhance the resistance to liquefaction. However, there are some problems in the traditional monitoring methods of gravel piles, such as irregular construction operation, unreliable process control, unscientific quality assessment and other issues. To meet the higher requirements of the construction quality monitoring for gravel piles, this paper researches and implements a construction quality monitoring system for gravel piles based on the Internet of Things technology, which is based on the analysis of control parameters for the construction quality of gravel piles. Field test results show that the system hardware has good earthquake resistance, data integrity, real-time performance and high reliability, with centimeter-level monitoring accuracy for pile point location and

Due to the characteristics of long period and complicated project, in order to display and manage the airport project in a comprehensive and visual way, it is imperative to establish an application system in 3D airport simulation in advance. This system is just based on this theory and developed by adopting 3DS MAX and Sketchup modeling tool and utilizing OpenGL 3D engine based on the development language Visual C++. The system realizes 3D informationized display and management of airport. The system is testified in necessity and intuitionism through practical examples. Keywords-3D; GIS; OpenGL; Airport; Engineering; Simulation