Effect of nearby piles and soil properties on thermal behaviour of a field-scale energy pile

The thermal response of an energy field scale pile that is part a pair piles spaced at centre-to-centre distance 3.5 m (i.e., 6D, where D the diameter), was examined experimentally and numerically. Three tests were conducted to assess axial radial responses pile: (i) heating alone, (ii) both simultaneously, (iii) other while considered not heated. Good agreement obtained between experimental numerical evaluations during tests. A parametric study validated model performed for each three understand effects varying soil conductivity, expansion coefficient, elastic modulus on pile. results confirmed stresses in insignificant compared stresses. impact more significant conductivity coefficient. significantly affected when heated even though ground temperature changes due interaction. Only minor non-thermal observed one different properties.