Energy pile system was developed on the basis of the ground-source heat pump. It is a new pile foundation form that combined the pile and ground-source heat pump system. Field study has been conducted on the bearing capacity of energy pile with half buried pipes under cooling cycles. The changing rules of the soil temperature surrounding the pile

pile body temperature

axial force and pile side friction have been got. The largest influence range around the energy pile is 100 cm

which is decreased gradually with increased depth. The pile body temperature decreases first and then increases from up to down under cooling cycles. The axial force and side friction detection shows that the energy pile with half buried pipe can also shrink from two sides to middle and the central point is located at the half bottom of the pipe buried part.