Geo-Modelling and Geo-Informatics
doi:10.3850/978-981-07-0188-8_P178
Improvement of Current Average Temperature Equation of Double Row Pipes Frozen Soil Wall
Shi-Min Sun, Hehua Zhu and Xiao-Jun Li
Department of Geotechnical Engineering, Tongji University,
Shanghai 200092, China
ABSTRACT
The demand for Artificial Ground Freezing (AGF) has been increasing in the past few decades in underground space development. Average temperature (AT), which is a parameter of temperature field, plays an important part in design as well as practical construction. However, there is limited research on double row pipes freezing and AT equation currently being used is too complex to be conveniently applied in practical application. This paper presents general procedures involved in automatic computation of AT and soil wall thickness. Effects of various influencing factors are analyzed with the aid of ANSYS. The analyses results show that AT is linearly related to freezing pipe diameter-to-row spacing ratio, interval-to-row spacing ratio, temperature of outer surface and soil freezing point, but nonlinearly related to thickness-to-row spacing ratio. Based on computer simulation results, the paper compares an existing equation with a simplified equation proposed in this paper.
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